CN104848379A - Air compressor heat recycling and water chilling unit combined refrigerating and heating system - Google Patents

Abstract

The invention discloses an air compressor heat recovery and chiller combined refrigeration and heating system, which includes a sequentially connected cooling tower, a screw chiller, a heat recovery water tank and a heat preservation water tank, between the cooling tower and the screw chiller, and the screw chiller. The chiller unit and the heat recovery water tank, and the heat recovery water tank and the heat preservation water tank are connected through two-way convection pipelines; the heat recovery machine of the air compressor and the heat recovery water tank are connected through two-way convection pipelines; The pipelines are respectively connected to the fan coil unit and the water supply port of the hot water end, the water outlet of the fan coil unit is connected to the return water port of the heat recovery water tank through the pipeline, and the water outlet of the hot water end is connected to the return water port of the heat preservation water tank through the pipeline. The invention applies the waste heat recovered by the heat recovery machine to the air-conditioning system or production and domestic water, which not only avoids the environmental pollution caused by the waste heat discharge of the screw compressor unit, but also avoids the large amount of energy consumed by the air-conditioning operation, production and domestic water.

Description

Air compressor heat recovery and chiller combined refrigeration and heating system

technical field

The invention relates to refrigeration and heating equipment, in particular to a refrigeration and heating system combined with heat recovery of an air compressor and a water chiller.

Background technique

If the waste heat generated by the compressor is not exchanged, it will cause high temperature of the motor and exhaust gas, which will not only affect the service life of the compressor, but also affect the quality of the compressed air; but if the heat is directly discharged by the cooling system, it will not only waste energy , will cause thermal pollution. At the same time, some enterprises need to consume heat for production, life and winter air conditioning. For example, the production process of some enterprises requires screw compressor units, and at the same time, workshops or office buildings require air conditioning systems, or hot water is required for production and living. If the two can be combined organically, the goals of energy saving, emission reduction and slowing down of global warming will be achieved.

Contents of the invention

In view of the above problems, the applicant provided an air compressor heat recovery and chiller combined refrigeration and heating system through research and improvement.

Technical scheme of the present invention is as follows:

An air compressor heat recovery and chiller combined refrigeration and heating system, including sequentially connected cooling tower, screw chiller, heat recovery water tank and heat preservation water tank, between the cooling tower and the screw chiller, the screw chiller Both the unit and the heat recovery water tank, and the heat recovery water tank and the heat preservation water tank are connected through two-way convection pipelines; the heat recovery machine of the air compressor is also included, and the heat recovery machine of the air compressor and the heat recovery water tank are connected through two-way convection The pipeline is connected; the water outlet of the thermal insulation water tank is respectively connected to the fan coil unit and the water supply port of the hot water end through the pipeline, the water outlet of the fan coil unit is connected to the return water port of the heat recovery water tank through the pipeline, and the heat The water outlet at the water end is connected to the water return port of the thermal insulation water tank through a pipeline.

Its further technical solution is: it also includes an air source heat pump, and the air source heat pump communicates with the heat recovery water tank through a two-way convection pipeline.

The beneficial technical effect of the present invention is:

In the present invention, the heat recovery unit of the screw compressor unit is combined with the screw chiller unit for refrigeration and heating, and the waste heat recovered by the heat recovery unit is applied to the air conditioning system or production and domestic water, thus avoiding the waste heat discharge of the screw compressor unit Pollution to the environment, and avoiding air-conditioning operation, production and domestic water consumption of a large amount of energy.

Advantages of the invention will be set forth in the description which follows in the detailed description, and in part will be apparent from the description which follows, or can be learned by practice of the invention.

Description of drawings

Fig. 1 is the overall structural block diagram of the present invention.

Detailed ways

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

As shown in Figure 1, the present invention consists of a cooling tower 1, a screw chiller 2, a heat recovery water tank 3, an insulated water tank 4, an air compressor heat recovery machine 5, a fan coil unit 6, a hot water terminal 7, and an air source heat pump 8. It is composed of the pipeline connecting the above units and the water pump installed on the pipeline.

Cooling tower 1, screw chiller 2, heat recovery water tank 3, and heat preservation water tank 4 are connected in sequence. Between the cooling tower 1 and the screw chiller 2 , between the screw chiller 2 and the heat recovery water tank 3 , and between the heat recovery water tank 3 and the heat preservation water tank 4 are communicated through two-way convection pipelines. The heat recovery machine 5 of the air compressor and the heat recovery water tank 3 are also communicated through a two-way convection pipeline. An air source heat pump 8 is optional, and the air source heat pump 8 is connected to the heat recovery water tank 3 through a two-way convection pipeline.

The water outlet of the heat preservation water tank 4 is respectively connected to the water supply port of the fan coil unit 6 and the hot water end 7 through pipelines. The water outlet of the fan coil unit 6 is connected to the water return port of the heat recovery water tank 3 through a pipeline. The water outlet of the hot water end 7 is then connected to the return water outlet of the thermal insulation water tank 4 through a pipeline.

The working mode of the present invention is as follows:

When heating in winter, the screw chiller 2 is out of service, and the hot water from the heat recovery unit 5 of the air compressor passes through the heat recovery water tank 3 and the heat preservation water tank 4, and part of it is used for heating the indoor air by the indoor fan coil unit 6, and the other part is used for heating the indoor air. The hot water terminal 7 of the factory is used for production and daily use.

When cooling in summer, the screw chiller 2 is turned on, and the air conditioner is cooled by the heat recovery water tank 3 and the heat preservation water tank 4 . When the temperature of the heat recovery water tank 3 is low, open the passage between the screw chiller 2 and the heat recovery water tank 3, and use the water in the heat recovery water tank 3 to take away the refrigerant cooling and condensing in the condenser of the screw chiller 2 Heat; when the temperature of the heat recovery water tank 3 is high, close the passage between the screw chiller 2 and the heat recovery water tank 3, open the passage between the screw chiller 2 and the cooling tower 1, and use the cooling tower 1 for cooling. In this case, the heat recovered by the air compressor heat recovery unit 5 and the heat recovered from the condenser of the screw chiller 2 pass through the heat recovery water tank 3, the heat preservation water tank 4, and the hot water terminal 7 for production, drinking water.

In the cooling and heating process, only when the hot water temperature does not meet the design requirements (such as when the air compressor does not work at night or when the heat consumption is extremely large), the air source heat pump 8 must be turned on for auxiliary heating.

Control method: the control of the present invention uses a separate control cabinet for independent control, so as to monitor and display the oil inlet temperature, inlet and outlet water temperature, inlet and outlet water pressure, user water tank temperature, water flow, etc. At the same time, the water circulation pipeline is controlled by monitoring the inlet water temperature of the heat recovery machine (adjustable temperature, adjustment range: 35°C to 80°C) or the temperature of the user's water tank (adjustable temperature, adjustment range: 35°C to 80°C). The water pump in the machine starts and stops. When the water inlet temperature or the water tank temperature does not reach the set temperature, the water pump works to let the water circulate and heat; when the water inlet temperature or the water tank temperature is higher than the set temperature, the water pump stops working and the water circuit stops circulating. The two controls can be switched mutually; in addition, if the inlet oil temperature exceeds 85°C, the water pump must work regardless of whether the inlet water temperature and the water tank temperature exceed 60°C. Record the working time of the water pump, display the cumulative running time, cumulative heat recovery, and instant heat recovery.

What is described above is only a preferred embodiment of the present invention, and the present invention is not limited to the above examples. It can be understood that other improvements and changes directly derived or conceived by those skilled in the art without departing from the basic idea of the present invention shall be considered to be included in the protection scope of the present invention.

Claims (2)

1. An air compressor heat recovery and chiller combined refrigeration and heating system is characterized in that it comprises a sequentially connected cooling tower (1), screw chiller (2), heat recovery water tank (3) and thermal insulation water tank ( 4), between the cooling tower (1) and the screw chiller (2), between the screw chiller (2) and the heat recovery water tank (3), between the heat recovery water tank (3) and the heat preservation water tank (4) All are connected through two-way convection pipelines; an air compressor heat recovery machine (5) is also included, and the air compressor heat recovery machine (5) and the heat recovery water tank (3) are connected through two-way convection pipelines; The water outlet of the thermal insulation water tank (4) is respectively connected to the water supply port of the fan coil unit (6) and the hot water end (7) through the pipeline, and the water outlet of the fan coil unit (6) is connected to the heat recovery water tank through the pipeline (3), the water outlet of the hot water end (7) is connected to the water return of the thermal insulation water tank (4) through a pipeline. 2. The air compressor heat recovery and chiller combined refrigeration and heating system according to claim 1, characterized in that: it also includes an air source heat pump (8), the air source heat pump (8) and the heat recovery water tank (3 ) are communicated through bidirectional convection pipelines.