CN107304754B

CN107304754B - Deformation type Rankine cycle low-temperature difference energy development system for energy collection by utilizing buoyancy

Info

Publication number: CN107304754B
Application number: CN201710181791.6A
Authority: CN
Inventors: 吕书龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-04-24
Filing date: 2017-03-17
Publication date: 2022-09-20
Anticipated expiration: 2037-03-17
Also published as: CN107304754A

Abstract

Deformation type rankine cycle low temperature difference energy development system of energy is adopted to utilize buoyancy, it should belong to low temperature difference energy development application, it utilizes the water of two kinds of different temperatures, cools off and heats a working medium of arranging in the device under water, this kind of device is called flexible chamber, its structural feature is: the upper cylinder barrel and the lower cylinder barrel are semi-closed, the middle part of the upper cylinder barrel and the lower cylinder barrel is provided with a telescopic body, a hot water inlet valve, a hot water outlet valve, a heater, a cold water inlet valve, a cold water outlet valve and a condenser, the unsealed surfaces of the two cylinder barrels are connected with the telescopic body, the heater is arranged on the lower cylinder barrel, and the condenser is arranged on the upper cylinder barrel. The volume of the energy-saving water-saving system is expanded by heating volume at the lower position, the hauling cable acts on the energy-saving water.

Description

Deformation type Rankine cycle low-temperature difference energy development system for energy collection by utilizing buoyancy

The technical field is as follows: the variable form Rankine cycle low temperature difference energy utilization and development system is a concept for energy collection by utilizing a buoyancy principle and belongs to the technical field of low temperature difference energy development and application.

Background art: the Rankine cycle system is a closed-loop energy conversion system which takes corresponding substances as working media (working media for short) and aims to convert temperature difference energy among the substances into ordered kinetic energy. FIG. 1 is a schematic diagram of a classical construction and process of a Rankine cycle (reference numbers refer to the drawing), wherein the direction of the arrows indicate the direction of flow of the working fluid, if the process is described in text; the method comprises the first step of pressurizing liquid working medium through a pressurizing pump (61) so as to enable the liquid working medium to be from low pressure to high pressure, the second step of heating the liquid working medium in a working medium heating chamber (62) after the liquid working medium flows out of the pressurizing pump (61) so as to enable the liquid working medium to form gas, and the third step of outputting the working medium which flows out of a heater and forms gas through a steam turbine (64) to push blades of the steam turbine to rotate, so that generated kinetic energy is output through a central shaft of the steam turbine to drive a generator (66) to generate electricity and output electric energy outwards. And fourthly, the gas working medium flowing out of the steam turbine enters a condensing chamber (65), the gas working medium is changed into liquid from gas due to being cooled, and the liquid working medium flowing out of the condensing chamber (65) enters a booster pump (61) and returns to the first step of the process, so that the working medium is repeatedly circulated in the system. To summarize, the working fluid must pass through the following four stages in the cycle: 1: liquid pressurization phase, 2: liquid heating and vaporizing stage, 3: gas work stage, 4: a gas cooling liquefaction stage.

The invention content is as follows:

the problems and purposes to be solved are as follows: the temperature difference between hot water and cold water of some low-temperature resources is required to have commercial development value.

The technical scheme is as follows: the system uses two kinds of resource water with different temperatures, uses hot water to heat the working medium of the system, vaporizes the working medium, uses cold water to cool the working medium of the system, and condenses and liquefies the working medium, and the development system mainly uses the temperature difference between the surface hot water (25-30 ℃) and the seabed cold water (10-15 ℃) of the ocean, or has two kinds of water meeting the temperature difference condition on the land. This development system is based on the rankine cycle and is consistent with the principles of the rankine cycle, but it works differently (see table below) so it is a variant. The system working medium adopts carbon dioxide and other organic substances with physical properties meeting the working conditions of the system as the working medium. The main components and structure of the system are as follows: the telescopic cavity (see later) is installed on a fixed track under water and reciprocates within a specified upper limit and lower limit range, and is connected with the hot water inlet and outlet valves when reaching the lower limit, so that the hot water passes through the heater in the telescopic cavity to heat and vaporize the liquid working medium in the telescopic cavity, and the telescopic cavity is connected with the cold water inlet and outlet valves when reaching the upper limit, so that the cold water passes through the cooler in the telescopic cavity to cool and liquefy the gaseous working medium in the telescopic cavity. Due to the existence of buoyancy, the telescopic cavity acts on the traction rope in the ascending process and acts on the traction rope in the descending process, and the difference of the consumed energy of the telescopic cavity and the traction rope is the energy output by the system. The lower table is the working modes of the Rankine cycle system and each working stage of the system;

the invention has the following effects: aiming at the defects that the gas turbine and the prior related equipment adopt energy for some gases which only have small expansion coefficient and can not realize stable pressure difference, the gas which only has the conditions is easy to obtain, such as: the system is characterized in that the system utilizes the temperature difference between sea surface water and sea bottom water in the sea, tail gas of a thermal power plant, natural water and other substances with low temperature difference, and the substances are used for heating and cooling corresponding gases, such as carbon dioxide and other substances, the gases are from higher temperature to lower temperature, from lower temperature to higher temperature, from higher pressure to lower pressure, from lower pressure to higher pressure, from gas to liquid and from liquid to gas, and in the change processes, the process that kinetic energy or potential energy stored by a large number of gas molecules is inevitably output ordered energy outwards is explored, a better receiving and converting mode for the energy is explored, and the system has very important significance and wide market prospect, and the system has the following three main advantages due to the utilization of buoyancy energy: 1: the thermal conversion efficiency is high because no matter how weak the contraction and expansion of the gas is, the gas can be expressed in the form of buoyancy, and the conversion efficiency can reach one hundred percent if the system detects that the resistance of water and the friction force of the system are not considered. 2: if the temperature difference between the high temperature source water and the low temperature source water is represented by a horizontal axis and the energy contained in each temperature difference point is represented by a vertical axis, an energy band curve is established, all energy levels of the system are theoretically utilized, whereas in the prior art, namely, in a traditional Rankine cycle, an evaporator is separated from a condenser, the pressure difference between the evaporator and the condenser is required to be fixed, so that only a narrow interval on the temperature difference energy levels of the hot water and the cold water can be utilized. 3: the condenser of the system heater always works under the pressure intensity basically equal to the pressure intensity inside and outside, so the wall of the condenser can be made very thin, which is very beneficial to heat conduction, thereby improving the heat exchange efficiency and greatly reducing the cost in this aspect. In view of the above points 3: so that the system has commercial development value, and the energy contained between the low-temperature difference water is possible to be applied by people.

Description of the drawings: like reference numbers refer to like elements or components throughout the several views and are in the same position in the system.

FIG. 1: the Rankine cycle system structure is a classical schematic diagram, and the symbols in the diagram represent: 61 is a working medium pressure pump, 62 is a working medium heating chamber, 63 is a heating pipe, 64 is a steam turbine, 65 is a condensing chamber, 67 is a condensing pipe, and 66 is a generator.

FIG. 2: the structural front view of the development system, marked numbers in the figure represent: the system comprises a telescopic cavity 9, a counterweight 10, collision valves 1, 4, 5 and 8, wherein the collision valves are identical in structure and different in specific positions in the system, the four

valves

2, 3, 6 and 7 are fixedly arranged on the telescopic cavity 9 and are component parts of a telescopic cavity device 9, guide pulleys of

traction ropes

22, 23, 24 and 25, an output wheel 26, a cold water suction pump 27, a hot water suction pump 28, a position encoder 29,

water surface buoys

19, 20 and 21, traction ropes 30 used for connecting the telescopic cavity and the counterweight, an output wheel electric brake 33, a hot water input pipe 34, a cold water input pipe 35 and a generator 36 (replaced by a three-phase asynchronous motor).

FIG. 3: front view of collision valve structure: 51 is a movable valve plate, 52 is a movable valve plate positioning track, 53 is a movable valve plate return spring, 54 is a movable valve plate impact rod, 55 is a static valve plate, and 56 is a valve body.

FIG. 4: front view of the telescopic cavity structure: the labels in the figures indicate: 2, 3, 6 and 7 are collision valves installed on the cavity, 81 is a condenser, 82 is a heater, 83 is an upper cylinder, 84 is a lower cylinder and 89 is a telescopic body.

FIG. 5: the front view of the heating plate and the cooling plate structure is provided with an A plate and a B plate. The direction of the arrows in the figure indicates the direction of the water flow.

FIG. 6: the longitudinal section three-dimensional structure effect diagram of the telescopic cavity and the longitudinal section three-dimensional structure effect diagram of the clash valve.

FIG. 7: the system constructs a three-dimensional effect diagram.

The specific implementation method comprises the following steps:

firstly, the method comprises the following steps: the main part structure of the system is as follows:

1: left view of clash valve fig. 3: when the two valves are driven to the independent state, the valves are in the closed state due to the action of the return spring 53. The right diagram of fig. 3 shows that when the two valves are displaced in opposite directions, the two valves are adhered together immediately, the edges of the two valves are in contact to form a closed surface, water cannot overflow or flow in through the contact surface, meanwhile, the middle of the two valves applies force to the collision rod 54, the collision rod applies force to the movable valve plate 51 again, so that the movable valve plate is far away from the static valve plate, the two valves are opened simultaneously, water can flow in and out along the arrow direction in the diagram, therefore, the two valves are both closed when the two valves are separated, and the two valves are both opened and in a mutual flow state when the two valves are in collision (see fig. 6, a cross-sectional view of a telescopic cavity and a collision valve three-dimensional structure).

2: the structure of the telescopic cavity is as follows: the front view of the structure of fig. 4 shows the components that make up the device: the upper cylinder 83 and the lower cylinder 84 are semi-closed, the middle telescopic body 89, the hot water inlet valve 6, the hot water outlet valve 7, the heater 82, the cold water inlet valve 2, the cold water outlet valve 3, the condenser 81, the unsealed surface of the two cylinders is connected with the telescopic body, the cylinders can be made of steel plates and other related materials, the telescopic body can be made of rubber and other soft materials, a metal ring is added at an inflection point for strengthening, the collision valves are respectively installed on the two sides of the upper cylinder and the lower cylinder, the cooler pipe and the heater inside are respectively connected with the collision valves, the heater is installed in the lower cylinder of the telescopic cavity, and the cooler is installed in the upper cylinder of the telescopic cavity (see a three-dimensional structure section effect diagram of the collision valves in figure 6). The heater is formed by winding a thin metal pipe into a plurality of annular pipes with different diameters, and the annular pipes are connected inside and outside to form a disc-shaped structure. Fig. 5 shows the appearance of the two types a and B of disc heaters, which are stacked when installed, connecting the a disc 2 to the B disc 3, i.e. the center point is connected, the a disc 1 is connected to the water inlet valve, the water flows from the a disc 2, from the a disc 3 to the B disc, and from the B disc 4 to the water outlet valve. The exchange area can also be enlarged by adopting a method of connecting a plurality of disks in parallel, but the quantity of the disks A and B is equal. The structure of the condenser is the same as that of the heater, the heat exchange is carried out with gas, so the exchange area is larger than that of the heater, the number of the parallel disks is larger, corresponding substances are selected as working media, on the premise that the telescopic cavity is arranged underwater at corresponding depth, the heater inside the telescopic cavity is completely immersed in the liquid working medium, when the maximum quantity is evaporated, at least the liquid working medium can still cover the whole heater, and the rest space inside the telescopic cavity is filled with the gas working medium. When the telescopic cavity is at a certain depth underwater, the existence of the telescopic body in the telescopic cavity leads to the fact that the internal and external pressures of the telescopic cavity are basically equal, the volume can be changed randomly within a certain range, if the proportion between the working medium gas state and the working medium liquid state in the telescopic cavity is unchanged, the temperature is unchanged, the volume is reduced when the pressure is increased, or the volume is increased when the pressure is reduced. If the proportion between the gas state and the liquid state of the working medium in the telescopic cavity is increased at the same depth underwater, the volume of the telescopic cavity is increased, otherwise, the volume of the telescopic cavity is reduced. And proper balance weights are added at two ends of the telescopic cavity to ensure that the telescopic cavity is not floated by water when the volume of the telescopic cavity is maximum. A heating process; the resource hot water exchanges heat energy to the liquid working medium through the heating pipe, the temperature of the liquid working medium is continuously increased, and the liquid working medium starts to evaporate under corresponding temperature and pressure, so that the volume of the telescopic cavity is increased. And (3) cooling: when the resource cold water passes through the condenser, the gaseous working medium around the condenser is cooled under the corresponding temperature and pressure, liquid begins to be formed on the condenser, the density of the liquid is higher than that of the gas, and the liquid immediately drops to the liquid space at the lower part of the telescopic cavity. In the system, the heater and the condenser work alternately, so that the heating process and the cooling process are not influenced by each other.

II, secondly: the system construction composition, the working process and the performance thereof are as follows:

1: fig. 2 is a two-dimensional front view of the system configuration, in which: 19. 20, 21 are 3 cylindrical buoys placed on the water surface, which support the weight of the whole system when the system is placed under water, wherein the devices above the buoys are all on the water surface, and the rest are all under water for a plurality of meters (see the upper limit depth and the lower limit depth of the telescopic cavity under water in the following text) according to the needs. The hot sea surface resource water is introduced to valve 5 through feed pipe 34 and the cold sea floor resource water is introduced to valve 1 through feed pipe 35. The telescopic cavity 9 and the counterweight 10 are connected through a traction rope 30,

guide pulleys

22 and 24, an output wheel 26 and

guide pulleys

25 and 23. The expansion cavity 9 reciprocates up and down in a three-dimensional space surrounded by the upper position collision valve 1, the lower position collision valve 5, the collision valve 8 and the fixed framework, is connected with the valve 1 and the valve 4 when reaching the upper position and is positioned by the upper position and the lower position, and cold water enters the expansion cavity condenser from the valve 1 to the valve 2 under the action of the water suction pump 27, exchanges cold energy with working media in the cavity, flows out from the valve 3 to the valve 4 and is discharged in place through the water suction pump 27. When the water pump is in the lower position, the water pump is connected with the valve 5 and the valve 8 and positioned by the valve 5 and the valve 8, hot water enters the telescopic cavity heater from the valve 5 to the valve 6 under the action of the water pump 28, exchanges heat energy with working media in the cavity, and then flows out from the valve 7 to the valve 8 to be discharged through the water pump 28 on site. The telescopic cavity and the counterweight are shown from the upper position to the lower position, or from the lower position to the upper position, and the whole system program is controlled by an industrial control PLC. Reference numeral 29 denotes a position encoder, which provides an upper position signal to the PLC extension chamber and the counterweight. The output wheel 26 is provided with a brake 33, which is controlled by the PLC. The PLC input signal has an upper in-place signal from a telescopic cavity of the position encoder and the counterweight, and the output signal has a signal for controlling the brake start and stop of the output wheel, a signal for controlling the operation stop of the two water pumps, a signal for controlling the operation stop of the generator and a signal for positively and negatively connecting the generator with a power grid. The time from starting to stopping of the two water suction pumps is manually set on the PLC according to the requirement.

2: buoyancy energy collection, and the working process of the system: assuming that the telescopic cavity runs to an upper position, assuming that the first step of the working process is started, the position encoder 29 inputs an upper position in-place signal of the telescopic cavity 9 to the PLC, the PLC outputs a driving signal which drives an output wheel to brake, a generator is stopped when being connected with a power grid, a water suction pump 27 runs, cold water enters a cooler of the telescopic cavity 9 through a valve 1, flows out of a valve 4 and is discharged in situ through the water suction pump 27, the volume of the telescopic cavity 9 begins to shrink after a period of time, when a set PLC time relay is in place, the driving signal output by the water suction pump releases the brake of the output wheel, the 27 pump stops running, the generator runs and is connected with the power grid in the forward direction (because the output wheel has the working process of rotating in the forward and reverse directions, the output wheel rotates in the forward direction), as the volume of the telescopic cavity 9 is reduced, the buoyancy of water is small, the weight of the telescopic cavity 9 is unbalanced with the weight of the counterweight in the water, and the counterweight 10 does ascending motion, thereby the hauling rope drives the output wheel to rotate, the output wheel drives the generator to rotate, along with the respective in-place of the telescopic cavity and the counterweight (see the dynamic working process of the telescopic cavity later), the PLC inputs the in-place signal of the counterweight 10 of the position encoder 29, the PLC outputs the driving signal again, the output wheel brakes to act, the generator stops being connected with the power grid, the water pump 28 runs, at this time, the resource hot water enters the heater of the telescopic cavity 9 through the valve 5, flows out from the valve 8 and is discharged through the water pump 28 on the spot, when the set PLC time is in place, the driving signal output by the PLC causes the brake release of the output wheel, the 28 water pump stops, the generator is reversely connected with the power grid (at this time, the output wheel reversely rotates), the size of the telescopic cavity 9 becomes large, the buoyancy of the water becomes light, the weight imbalance of the telescopic cavity and the counterweight in the water is caused, the counterweight 10 makes the descending movement, the telescopic cavity 9 makes the ascending movement, the traction rope drives the output wheel, the output wheel drives the generator to rotate, and the first step starts the program along with the respective positions of the telescopic cavity 9 and the counterweight (see the dynamic working process of the telescopic cavity later), so that the repeated cycle is realized like other heat engines. The telescopic cavity reciprocates up and down and outputs energy outwards, the process is caused by buoyancy, the operation mechanism of the telescopic cavity expresses the expansion energy or contraction energy of gas in the form of buoyancy, and the system is called buoyancy energy collection. Ascending and descending speed control of the telescopic cavity: the system requires stable speed for ascending and descending, a three-phase alternating current asynchronous motor is used for replacing a generator, the generator is connected with a power grid in a positive and negative alternate mode, when the system works at super-synchronous rotating speed, electric energy is output, the ascending and descending speed of a telescopic cavity is controlled reversely, and the rotating speed of the three-phase alternating current asynchronous motor is determined to fluctuate within a small range only by the very hard torque slip curve characteristic.

3: dynamic working process of the telescopic cavity; in the process of rising the telescopic cavity from the lower limit to the upper limit, the pressure intensity is gradually reduced, the volume is gradually increased, hot water stored in a heating pipe with a certain volume and residual liquid temperature around the heater are added, due to the existence of a curve of the temperature of a working medium and saturated vapor pressure, a liquid working medium is evaporated at any time in the rising process of the telescopic cavity due to the reduction of air pressure, so that the temperature of the hot water in the heater is reduced, the working medium is not evaporated after the hot water reaches a balance point, the telescopic cavity rises again at the moment, the internal air pressure is reduced again, the telescopic cavity meets the evaporation condition of the working medium, the evaporation is carried out again, the evaporation is stopped after the new balance point is reached, therefore, in the rising process of the telescopic cavity, the liquid is evaporated at each distance, the new balance point of the temperature and the saturated vapor pressure is established at each distance, so that more gaseous working media in the telescopic cavity gradually change, in the rising process, the volume is increasing. Meanwhile, the temperature of hot water stored in the heating pipe and the temperature of the liquid working medium are reduced due to the fact that evaporation liquid absorbs a large amount of heat, air pressure inside the telescopic cavity is gradually reduced along with the gradual rising of the telescopic cavity, and therefore when the telescopic cavity reaches an upper limit, the residual temperatures of the heating pipe and the liquid working medium are close to the temperature of cold water of resources, the residual temperatures of the heating pipe and the liquid working medium in the telescopic cavity cannot obviously affect the next procedure, namely the cooling process, and therefore the heating pipe stores a certain amount of hot water and can improve the system efficiency. The pressure of the telescopic cavity is gradually increased in the descending process from the upper limit to the lower limit, the volume of the telescopic cavity is gradually reduced, and the cold water stored in the condenser with a certain volume is cooled and liquefied at any time in the descending process of the telescopic cavity due to the existence of the temperature of the working medium and the curve of saturated steam pressure, so that the volume of the telescopic cavity is smaller. Because the temperature of the water in the cooling pipe is increased while the liquid gas working medium is liquefied, the water does not liquefy the working medium after reaching the balance point, the telescopic cavity descends again, the internal air pressure rises again, the working medium liquefaction is carried out again, and the liquefaction is stopped after reaching the new balance point, therefore, the liquid gas working medium is liquefied at each distance in the descending process of the telescopic cavity, and the new balance point of the temperature and the air pressure is established at each distance. Along with flexible chamber progressively descends, flexible intracavity atmospheric pressure progressively risees, satisfies working medium liquefaction condition in the flexible intracavity all the time, when flexible chamber moves to the next position, the condenser owing to be in the liquefied gas that does not stop, its temperature has more closely resource hot water temperature, and the cooling tube can not obviously influence one program down of system, the heating process promptly, so, flexible chamber cooling tube stores and has the cold water of a certain amount and can improve system efficiency. For example; here, we can make a complete theoretical speculation without considering the influence of other factors, and if we use carbon dioxide as the working medium, the heating temperature of the system to the working medium is set to 25 degrees, and the corresponding saturated vapor pressure is about 64 atmospheres, then the lower pressure of the telescopic cavity in water can be set to 64 atmospheres. The system can be decided as 15 degrees to the cooling temperature of the working medium, corresponding to the saturated vapor pressure of the working medium, the upper pressure of the telescopic cavity in water can be decided as 51 atmospheric pressures, the telescopic cavity is supposed to be in the ascending process at this time, the internal vapor pressure is gradually reduced from 64 atmospheric pressures to 51 atmospheric pressures, because the last step is the heating process, the residual temperature exists in the heating pipe, when the telescopic cavity is in the upper position, the internal vapor pressure is already 51 atmospheric pressures, according to the temperature of carbon dioxide and the curve of the saturated vapor pressure, as long as the temperature of the heating pipe is not lower than 15 degrees, the liquid is always vaporized, the temperature in the telescopic cavity is further reduced, and the residual temperature of the heating pipe has no obvious influence on the next cooling process. In the same way, assuming that the telescopic cavity is descending, when the telescopic cavity is at the lower position, the air pressure in the telescopic cavity is 64 air pressures, and according to the temperature of carbon dioxide and the saturated vapor pressure curve, as long as the temperature of the cooling pipe is not higher than 25 ℃, the cooling pipe is liquefied gas all the time, so that the temperature of the condenser is further increased, and the low-temperature cold water carried by the condenser in the previous process has no obvious influence on the heating process of the next process. The heater pipe and the condenser pipe of the telescopic cavity are made thicker, and the heating space and the cooling space are reserved to be larger, so that the volumes of hot water and cold water stored in the heating space and the cooling space are larger, and the problem of water storage in the cavity of the telescopic cavity can be solved by using the method.

4: the lower limit depth and the upper limit depth of the telescopic cavity under water are as follows: the lower limit depth is determined as the heatable temperature value of the working medium, the saturated vapor pressure of the working medium at the temperature is equal to the depth pressure of corresponding water, the depth of the water under the pressure is the lower limit depth of the telescopic cavity, the telescopic cavity is extruded due to the bottom positioning when the telescopic cavity is at the lower position due to the self weight and the balance weight of the telescopic cavity, the internal pressure is increased, and the heating condition and the heating efficiency are also considered, so the actual lower limit is increased. The upper limit depth is the temperature at which the working medium can be cooled, the saturated vapor pressure of the working medium at the temperature is equal to the depth pressure of corresponding water, the depth of the water at the pressure, namely the upper limit depth of the telescopic cavity, the telescopic cavity is stretched due to the self weight of the telescopic cavity and the balance weight, so that the internal pressure is reduced, and the cooling condition and the cooling efficiency are also considered, so that the actual upper limit is reduced.

5: energy supply mode: the energy output by the system is intermittent, and the energy is also variable when three-phase alternating current power frequency voltage is required to be provided for the system, and the problem can be solved by connecting a plurality of systems in parallel.

Claims

1. A deformation type Rankine cycle low temperature difference energy development system utilizing buoyancy energy collection comprises a heater (82) and a condenser (81), and is characterized in that: a fixed framework is vertically supported on 3 buoys (19) on a first water surface, a buoy (20) on a second water surface and a buoy (21) on a third water surface, the upper end surface of the fixed framework is above the water surface, a first collision valve (1) and a second collision valve (4) are respectively installed on the fixed framework on the left side and the right side of an upper line of a running track of a telescopic cavity (9), a third collision valve (5) and a fourth collision valve (8) are respectively installed on the fixed framework on the left side and the right side of the lower line of the running track of the telescopic cavity (9), a resource cold water conveying pipeline (35), the first collision valve (1), the telescopic cavity (9) in the upper state, the second collision valve (4) and a resource cold water suction pump (27) are sequentially connected in an open loop mode, and a resource hot water conveying pipeline (34), the third collision valve (5), the telescopic cavity (9) in the lower state and a resource cold water suction pump (27), Fourth collision valve (8), resource hot water suction pump (28) open loop in proper order connect, first leading sheave (22), third leading sheave (24), output wheel (26), fourth leading sheave (25), second leading sheave (23) connect gradually in fixed framework upper end plane, haulage rope (30) loop through first leading sheave (22), third leading sheave (24), output wheel (26), fourth leading sheave (25), second leading sheave (23), the one end of haulage rope (30) with flexible chamber (9) link to each other, the other end and the counter weight thing (10) of haulage rope (30) link to each other, fixed framework with first collision valve (1), second collision valve (4), third collision valve (5), fourth collision valve (8) are connected and are formed: a telescopic cavity (9) which is controlled by a program and runs by the heater (82) and the condenser (81), and a rail which vertically reciprocates; the telescopic cavity (9) comprises an upper cylinder barrel (83), a telescopic body (89) and a lower cylinder barrel (84), the upper cylinder barrel (83), the telescopic body (89) and the lower cylinder barrel (84) are sequentially connected, the condenser (81) is installed inside the upper cylinder barrel (83), two ports of the condenser are respectively connected to two symmetrical positions on two sides of the upper cylinder barrel (83), and outlets of the two ports of the condenser are respectively connected with a fifth collision valve (2) and a sixth collision valve (3) outside the upper cylinder barrel; the heater (82) is arranged in the lower cylinder barrel (84), two ports of the heater are respectively connected to the symmetrical positions on two sides of the lower cylinder barrel (84), and outlets of the two ports of the heater are respectively connected with a seventh collision valve (6) and an eighth collision valve (7) outside the cylinder barrel; the telescopic cavity (9) further comprises a seventh collision valve (6), an eighth collision valve (7), a fifth collision valve (2) and a sixth collision valve (3), the telescopic cavity (9) is installed on a fixed rail of the launching water and reciprocates within a specified upper limit and lower limit range, and is connected with the seventh collision valve (6) and the eighth collision valve (7) to the lower limit, so that hot water passes through a heater (82) in the telescopic cavity (9), liquid working media in the telescopic cavity (9) are heated and gasified, the telescopic cavity (9) is connected with the fifth collision valve (2) and the sixth collision valve (3) to the upper limit, and cold water passes through a condenser (81) in the telescopic cavity (9), so that gaseous working media in the telescopic cavity are cooled and liquefied.

2. The deformation type Rankine cycle low temperature difference energy development system utilizing buoyancy energy collection according to claim 1, characterized in that: the telescopic body structure of the telescopic body (89) is a cylinder space, a triangular groove is uniformly, continuously and transversely formed on the cylindrical surface of the cylinder, the projections of two side surfaces of the cylindrical surface are in a sawtooth structure, the surface of the space shape is surrounded by a deformable material, two end surfaces are not included, and a metal ring is embedded in the deformable material at the groove tip of the groove bottom.

3. The deformation type Rankine cycle low temperature difference energy development system utilizing buoyancy energy collection according to claim 2, characterized in that: the deformable material is a rubber material or a material with the same physical characteristics.

4. The deformation type Rankine cycle low temperature difference energy development system utilizing buoyancy energy collection according to claim 1, characterized in that: the first collision valve (1), the second collision valve (4), the third collision valve (5), the fourth collision valve (8), the fifth collision valve (2), the sixth collision valve (3), the seventh collision valve (6), and the eighth collision valve (7) include: the valve comprises a movable valve plate (51), a movable valve plate positioning track (52), a movable valve plate return spring (53), a movable valve plate impact rod (54), a static valve plate (55) and a valve body (56);

the static valve piece (55) is installed on valve body (56) of valve access & exit, and the contact closed surface when static valve piece (55) outside is two valves and collides, moves valve piece (51) in the inboard of static valve piece (55), moves valve piece and connects moving valve piece (51) to striker (54), and its shaft-like position is inserted in moving valve piece reset spring (53) center to the track of moving valve positioning track (52), moving valve positioning track (52) are connected with valve body (56), it is in to striker (54) that the moving valve piece moves back and forth in the track of moving valve positioning track (52), and its scope is: when reaching the upper point, the movable valve plate (51) is fully contacted with the static valve plate (55), and when reaching the lower point, the movable valve plate is fully opened.

5. The deformation type Rankine cycle low temperature difference energy development system utilizing buoyancy energy collection according to claim 1, characterized in that: the output wheel (26) is an output point of the universal scrolling equipment and is sequentially connected with the brake (33), the speed reducer and the three-phase asynchronous motor (36).

6. The deformation type Rankine cycle low temperature difference energy development system utilizing buoyancy energy collection according to claim 1, characterized in that: the heater (82) or the condenser (81) is a multi-layer circular ring wound by tubular metal materials, the rings are sleeved with one another, adjacent circular rings are connected, the centers of the two single-chip heaters (82) or condensers (81) are connected in series to form a group, and the groups are connected in parallel.

7. The deformation type Rankine cycle low-temperature-difference energy development system utilizing buoyancy energy collection as claimed in claim 1, characterized in that: the position encoder (29), the motor (36) start-stop switch, the brake (33) start-stop switch, the cold water suction pump (27) start-stop switch and the hot water suction pump (28) start-stop switch are all connected with the industrial control PLC.

8. The deformation type Rankine cycle low temperature difference energy development system utilizing buoyancy energy collection according to claim 1, characterized in that: the telescopic cavity (9) comprises an upper line and a lower line, the lower line is determined as a heatable temperature value of the resource hot water to the working medium, the saturated vapor pressure of the working medium at the temperature is equal to the pressure in the telescopic cavity (9), the depth of the pressure water in the telescopic cavity (9) is kept to be the lower line of the telescopic cavity (9), the heatable temperature value is in the range of 1-5 ℃ lower than the actual temperature, the upper line is a coolable temperature value of the resource cold water to the working medium, the saturated vapor pressure of the working medium at the temperature is equal to the pressure in the telescopic cavity (9), the depth of the pressure water in the telescopic cavity (9) is kept to be the upper line of the telescopic cavity (9), and the coolable temperature value is in the range of 1-5 ℃ higher than the actual temperature.