CN103244987B - Based on heating installation round the clock efficient under the limited space area of optically focused current collection - Google Patents

Abstract

A high-efficiency day and night heating device based on concentrating solar energy collection in a limited site area, including: a concentrating high-efficiency solar heat collection system, consisting of a concentrating solar heat collector and a heat collecting circulation pump, and a concentrating solar heat collector It includes a flat-plate solar collector, the upper end of which is equipped with a concentrating reflective collector plate, which is composed of a solar collector plate covered with a selective reflective outer surface layer; a constant temperature heat exchange system, including a constant temperature water tank and a constant temperature water tank respectively Connected hot water tank and air source heat pump; the hot water tank is connected to the flat-plate solar collector through circulating water pipes; the secondary exchange type day and night heat exchange system includes heating equipment and temperature difference circulation pump, heating equipment and constant temperature water tank Connected through circulating water pipelines; intelligent photovoltaic power supply system, including photovoltaic power generation system, battery pack and uninterruptible power supply, uninterruptible power supply is connected with photovoltaic power generation system, mains power and battery pack respectively, and uninterruptible power supply is connected with air source heat pump through frequency conversion starting device connect.

Description

High-efficiency day and night heating device based on concentrated light collection under limited site area

technical field

The invention relates to a central heating device, in particular to a high-efficiency day and night heating device based on concentrated light and electricity collection under a limited site area.

Background technique

At present, energy is becoming more and more tense, and people are gradually turning their attention to the development and utilization of renewable energy. Among them, cheap and pollution-free solar energy is favored by people. At present, solar energy utilization technology has developed rapidly, and the technology of using solar energy for heating is becoming more and more mature. However, due to the constraints of geographical location, space and other installation conditions, the efficiency of existing solar collectors is still not enough to meet heating needs; at the same time, using solar energy alone Also can't realize day and night uninterrupted heating.

Contents of the invention

The technical problem to be solved by the present invention is to provide a high-efficiency day and night heating device based on concentrated light and electricity collection under a limited site area, which can reduce the impact on the installation site area by improving the heat collection efficiency of solar vacuum tubes under limited site areas such as roofs. Requirements, and use the air source heat pump to realize night heating, so as to realize 24-hour uninterrupted heating, with low cost and high energy efficiency.

In order to solve the above technical problems, the present invention provides a high-efficiency day and night heating device based on concentrated light collection and limited site area, including:

The concentrating high-efficiency solar heat collection system is composed of a concentrating solar heat collector and a heat collecting circulation pump on its circulating water pipeline. The concentrating solar heat collector includes a flat-plate solar Heater, the upper end of the flat-plate solar collector is provided with a concentrating reflective collector plate, which is composed of a solar collector plate covered with a selective reflective outer surface layer, and the outer surface layer is used to absorb sunlight The long wave is reflected to the surface of the flat-plate solar collector;

The primary constant-temperature heat exchange system includes a constant-temperature water tank, a water-collecting tank and an air-source heat pump connected to the constant-temperature water tank through circulating water pipes; The circulating water pipeline connecting the constant temperature water tank and the hot water tank is provided with a temperature difference circulating pump;

The secondary exchange type day and night heat exchange system includes heating equipment and a temperature difference circulation pump, the heating equipment is connected to the constant temperature water tank through a circulating water pipeline, and the temperature difference circulation pump is arranged on the water inlet pipeline of the heating equipment;

The intelligent photovoltaic power supply system includes a photovoltaic power generation system, a battery pack and an uninterruptible power supply. The uninterruptible power supply is connected to the photovoltaic power generation system, the mains and the battery pack respectively, and is used to realize the charging of the battery pack by the photovoltaic power generation system or the mains power and The external power supply of the uninterruptible power supply; the uninterruptible power supply is connected with the air source heat pump through the frequency conversion starting device, and is used for the power supply of the air source heat pump. In the above technical solution, the outer surface layer of the light concentrating reflective collector plate is a rotating involute surface with a spherical heat absorber as the base circle.

In the above technical solution, the photovoltaic power generation system includes the solar collector plate part of the concentrating reflective collector plate, the photovoltaic combiner box and the photovoltaic inverter connected in sequence.

Compared with the prior art, the beneficial effect of the present invention is that: the light-concentrating reflective collector plate is installed on the common flat-plate solar heat collector, which can reflect the sunlight to the flat-plate solar heat collector, and the long wave in it is absorbed , thereby improving the heat collection efficiency of the flat-plate solar collector, and the short wave is used for power generation and stored by the battery. Anqing petrochemical boiler experiments show that the flat-plate solar collectors using concentrating reflective collector plates can increase their heat collection efficiency by an average of 30-50%, which is very suitable for laying on limited sites such as roofs; air source heat pumps are used as The auxiliary heating device can ensure the heating in rainy days or at night, and realize the 24-hour uninterrupted heating of the whole device; the use of photovoltaic power generation system as the auxiliary power supply of the air source heat pump makes more effective use of cheap and environmentally friendly solar energy, and ensures the air source Stable operation of the heat pump in the event of a power outage.

Description of drawings

Fig. 1 is a schematic diagram of the structure and working principle of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of the concentrating solar heat collector in Fig. 1 .

Fig. 3 is a schematic structural diagram of the smart photovoltaic power supply system in Fig. 1 .

In the figure: 1—concentrating high-efficiency solar heat collection system, 2—primary constant temperature heat exchange system, 3—secondary exchange type day and night heat exchange system, 4—intelligent photovoltaic power supply system, 5—concentrating solar heat collector (of which: 5.1—flat-plate solar collector, 5.2—bracket, 5.3—light-concentrating reflective collector plate), 6—heat collection circulation pump, 7—heat collection water tank, 8, 11—temperature difference circulation pump, 9— Constant temperature water tank, 10—air source heat pump, 12—radiator, 13—photovoltaic combiner box, 14—photovoltaic inverter, 15—battery pack, 16—frequency conversion starting device, 17—uninterruptible power supply, 18—solenoid valve.

detailed description

Specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a high-efficiency day and night heating device based on concentrating electricity collection in a limited site area of the present invention includes a concentrating high-efficiency solar heat collection system 1, a primary constant temperature heat exchange system 2, and a secondary exchange type day and night heating system. Heat exchange system 3 and smart photovoltaic power supply system 4, specifically.

The concentrating high-efficiency solar heat collection system 1 is composed of a concentrating solar heat collector 5 and a heat collecting circulation pump 6 on a circulating water pipeline. The concentrating solar heat collector 5 is shown in Figure 2, including a flat-plate solar heat collector 5.1 supported on the installation base by a bracket 5.2, and the upper end of the flat-plate solar heat collector 5.1 is provided with a concentrating reflective collector plate 5.3, Concentrating reflective collector plate 5.3 is composed of a solar collector plate covered with a selective reflective outer surface layer. The outer surface layer is a rotating involute surface with a spherical heat absorber as the base circle. This structure can not only take advantage of direct sunlight Light, and can make full use of scattered light around, so that the heat collection efficiency of the flat-plate solar collector 5.1 is greatly improved. The light-concentrating reflective collector plate 5.3 can also re-aggregate the originally scattered sunlight when the sun’s incident angle is not good, and the long waves in it are reflected to the flat-plate solar heat collector 5.1, thereby improving the solar heat collector 5.1 per unit installation area. Heat collection and heat preservation effect, reduce heat loss. At the same time, its solar collector panels have a collector effect, absorbing short-waves for power generation, and can store the remaining solar energy in the form of collectors. During installation, the flat-plate solar heat collector 5.1 is set towards the direction of sunlight radiation, and according to the local solar radiation angle, the concentrating reflective collector plate 5.3 is installed at an appropriate angle to reflect sunlight to the maximum.

The primary constant-temperature heat exchange system 2 includes a constant-temperature water tank 9, a water-collecting tank 7 and an air-source heat pump 10 respectively connected to the constant-temperature water tank 9 through circulating water pipes. The hot water tank 7 is connected with the above-mentioned flat-plate solar collector 5.1 through a circulating water pipeline to obtain hot water heated by the flat-plate solar collector 5.1. The circulating water pipe connecting the hot water tank 7 and the constant temperature water tank 9 is provided with a temperature difference circulation pump 8. Under the condition of sufficient sunlight, the water heated by the concentrating high-efficiency solar heat collection system 1 is circulated from the hot water tank 7 to the constant temperature. Water tank 9; in rainy days or at night, the water in the constant temperature water tank 9 is heated by the air source heat pump 10. The hot water tank 7 is also connected to a water source for the supply of cold water, and the cold water supply pipeline is provided with a solenoid valve 18 to realize water supply control.

The secondary exchange type day and night heat exchange system 3 includes heating equipment such as radiators 12 and a temperature difference circulating pump 11 . A water inlet pipe from the constant temperature water tank 9 is connected with the water inlet end of the radiator 12 through the temperature difference circulation pump 11, and a return pipe from the water return port of the radiator 12 forms a loop with the constant temperature water tank 9. The radiator 12 is installed at the user's place for heating.

As shown in FIG. 3 , the smart photovoltaic power supply system 4 includes a photovoltaic power generation system, a battery pack 15 and an uninterruptible power supply 17 . The photovoltaic power generation system includes a concentrating reflective collector plate 5.3 solar collector plate part, a photovoltaic combiner box 13 and a photovoltaic inverter 14 connected in sequence. The uninterruptible power supply 17 is respectively connected with the photovoltaic power generation system, the mains power and the storage battery pack 15 for charging the storage battery pack 15 by the photovoltaic power generation system or the mains power supply and external power supply of the uninterruptible power supply 17 . The uninterruptible power supply 17 is connected to the above-mentioned air source heat pump 10 through the frequency conversion starting device 16 , and is used for power supply of the air source heat pump 10 .

The whole heating device of the present embodiment adopts the electronic control system to control each equipment. For example, liquid level gauge and temperature sensor are arranged in the hot water tank 7. When the water temperature of the hot water tank 7 is greater than the auxiliary heating set temperature, and the water level When it is less than the set value, the electromagnetic valve 19 opens the upper cold water, and when the water temperature of the hot water tank 7 is less than or equal to the auxiliary heating set temperature, and when the water level reaches the set value, the replenishment stops. The temperature sensor between the hot water tank 7 and the constant temperature water tank 9 will control the start-up of the temperature difference circulation pump 8 to realize the effect that heat is transferred from the hot water tank 7 to the constant temperature water tank 9 .

The working principle of this embodiment is: under sunlight, the flat-plate solar collector 5.1 absorbs solar radiation and the long wave in the reflection part of the light-concentrating reflective collector plate 5.3, and the selective absorption coating in the light-condensing reflective collector plate 5.3 Then absorb the short-wave power generation and store it in the battery pack 15 as a backup power source to meet the operation of the air source heat pump 10 in case of power failure. The concentrating high-efficiency solar heat collection system 1 is used as the main energy source, and the air source heat pump 10 and its intelligent photovoltaic power supply system 4 are used as the auxiliary heating system, which is only used in rainy days or at night. When the mains power is normal, the mains power is used as the air source heat pump 10 In the case of a power failure, the battery pack 16 is used to supply power to the air source heat pump 10 .

The core of the present invention is that the light-concentrating reflective collector plate 5.3 is installed on the ordinary flat-plate solar heat collector 5.1, which significantly improves the heat collection efficiency of the flat-plate solar heat collector 5.1, and can meet the heating demand under the limited site area, and at the same time Utilize its solar collector plate to absorb short-wave power generation in sunlight; the air source heat pump 10 is used as an auxiliary heating device, and the photovoltaic power generation system is used as the auxiliary power supply of the air source heat pump 10, which further improves the utilization efficiency of solar energy and ensures the safety of the whole device. Heating around the clock. Therefore, its protection scope is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can carry out various modifications and distortions to the present invention and not depart from the scope and spirit of the present invention, for example: the outer surface layer of light-concentrating reflective collector plate 5.3 is selected to use spherical heat absorbing body as the rotation of base circle The involute surface is the preferred structure of this embodiment, and the use of other structures such as plane reflectors can also improve the heat collection efficiency of the flat-plate solar collector 5.1 to a certain extent; the heating equipment is not limited to the radiator 12, and other conventional hot water Heating equipment is also feasible; according to the actual situation on site, the photovoltaic power generation system can also be replaced by other existing structures. If these changes and modifications fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims (3)

1., based on a heating installation round the clock efficient under the limited space area of optically focused current collection, it is characterized in that, it comprises:

Concentration type high-efficiency solar thermal collection system (1), be made up of the thermal-arrest circulating pump (6) on focus solar collector (5) and circulating water pipeline thereof, described focus solar collector (5) comprises the flat-plate solar heat collector (5.1) be arranged on installation foundation, flat-plate solar heat collector (5.1) upper end is provided with light gathering reflector collector plate (5.3), light gathering reflector collector plate (5.3) is made up of the solar power current collection plate being coated with selective reflecting outer surface layer, its outer surface layer is used for the long wave in sunlight being reflexed to flat-plate solar heat collector (5.1) surface,

A thermostatic type heat-exchange system (2), comprises constant temperature water tank (9) and the heat collection water tank (7), the air source heat pump (10) that are connected with constant temperature water tank (9) respectively by circulating water pipeline; Described heat collection water tank (7) is connected by circulating water pipeline with flat-plate solar heat collector (5.1), and the circulating water pipeline that described constant temperature water tank (9) is connected with heat collection water tank (7) is provided with temperature-difference circulation pump (8);

Secondary exchanging is heat-exchange system (3) round the clock, and comprise heating equipment and temperature-difference circulation pump (11), described heating equipment is connected by circulating water pipeline with constant temperature water tank (9), and described temperature-difference circulation pump (11) is arranged on the inlet channel of heating equipment;

Intelligent photovoltaic electric power system (4), comprise photovoltaic generating system, batteries (15) and uninterrupted power source (17), described uninterrupted power source (17) is connected with photovoltaic generating system, civil power and batteries (15) respectively, for realizing photovoltaic generating system or the civil power supplying power for outside to the charging of batteries (15) and uninterrupted power source (17); Uninterrupted power source (17) is connected with described air source heat pump (10), for the power supply of air source heat pump (10) by static frequency converter (16).

2. according to claim 1 based on heating installation round the clock efficient under the limited space area of optically focused current collection, it is characterized in that: the rotation involute surface that the outer surface layer of described light gathering reflector collector plate (5.3) is is basic circle with spherical absorber.

3. according to claim 1 and 2 based on heating installation round the clock efficient under the limited space area of optically focused current collection, it is characterized in that: described photovoltaic generating system comprises light gathering reflector collector plate (5.3) the solar power current collection plate portion, photovoltaic combiner box (13) and the photovoltaic DC-to-AC converter (14) that connect successively.