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Multistage-compression multi-condenser interstage throttling incomplete cooling moderate and high temperature heat pump system

A high-temperature heat pump and condenser technology, which is applied in the field of high-temperature heat pump systems with incomplete throttling in the middle of multi-stage compression and multi-condenser cooling, can solve the problems of low energy efficiency of the system, large compression ratio, large irreversible loss, etc., and improve economic benefits. , The effect of reducing the pressure ratio and reducing the irreversible loss of heat transfer

Pending Publication Date: 2019-11-22
TIANJIN UNIV OF COMMERCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a medium-high temperature heat pump system using multi-stage compression and multi-stage condensation to solve the problems of large irreversible loss in the heat exchange process, large compression ratio and low energy efficiency of the system

Method used

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  • Multistage-compression multi-condenser interstage throttling incomplete cooling moderate and high temperature heat pump system
  • Multistage-compression multi-condenser interstage throttling incomplete cooling moderate and high temperature heat pump system
  • Multistage-compression multi-condenser interstage throttling incomplete cooling moderate and high temperature heat pump system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Medium- and high-temperature heat pump system with two-stage compression and two-condenser intermediate throttling incomplete cooling

[0027] The system consists of the first-stage heat pump cycle, the second-stage heat pump cycle and the continuous heating process of normal temperature water. The system is as follows: figure 1 shown.

specific Embodiment approach

[0028] (1) If the system uses pure working fluid, the temperature and enthalpy diagram of the medium and high temperature heat pump system is incompletely cooled by the two-stage pure compression double condenser with intermediate throttling: figure 2 shown. The specific implementation is as follows:

[0029] The first step: the first-stage compressor 3 sucks the low-temperature and low-pressure working fluid at the outlet of the evaporator 2 working fluid side (such as figure 2 State 1), compress it into a superheated gas of medium temperature and pressure (such as figure 2 State 2), after which the superheated gas is divided into two paths. One path of gas flows into the first-stage condenser 4 working medium side inlet, and the working medium in the condenser is condensed to saturated liquid (such as figure 2 State 10), and normal temperature water (such as figure 2 State w1) heated to a certain temperature (such as figure 2 state w2). After that, the working fl...

Embodiment 2

[0039] Embodiment 2: The heating and hot water heating pipelines are connected in parallel between the condenser and the regenerator to form a dual-stage compression dual-condenser intermediate throttling incomplete cooling heat pump dual-supply system. The system is as follows Figure 4 shown.

[0040] The heat supply terminal 11 can be equipped with fan coils, floor coils, radiators and other heat supply terminals. The normal temperature heat exchange fluid at the outlet of the heat supply terminal 11 enters the heat exchange fluid side of the first-stage condenser 4 and is heated to a certain level for the first time. temperature, and then flows into the heat exchange fluid side of the regenerator 6, the return water at the heating end exchanges heat with the high-temperature working fluid flowing out of the first-stage compressor 3, the exhaust temperature of the first-stage compressor 3 decreases, and the heat-supply end The returned water is further heated and used for r...

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Abstract

The invention discloses a multistage-compression multi-condenser interstage throttling incomplete cooling moderate and high temperature heat pump system composed of an evaporator, all stages of compressors, all stages of condensers, all grades of throttling valves, all grades of bypass throttling valves and all grades of heat regenerators. The multistage-compression multi-condenser interstage throttling incomplete cooling moderate and high temperature heat pump system can heat normal temperature water according to technological requirements by setting different number of stages and used for producing ordinary civil domestic hot water industrial moderate and high temperature hot water, industrial high pressure steam and the like. By means of the multistage compression and multistage condensation process of refrigerant, repeated continuous heating of normal temperature water is conducted, irreversible loss caused by heat exchange with the refrigerant in the normal temperature water heating process can be significantly lowered, the compression ratio between all the grades of compressors is small, the bypass throttling valves are used for throttling and decompression so as to cool exhaust of the compressors; heating hot water heating pipelines connected between the condensers and the corresponding regenerators in parallel can be used for room heating, and heat gradient utilizationcan be achieved.

Description

technical field [0001] The invention relates to the technical field of heat pumps, in particular to a medium-high temperature heat pump system for incomplete cooling with intermediate throttling in the middle of multi-stage compression and multiple condensers. Background technique [0002] There is a wide demand for medium-high temperature hot water and steam in life and industry. However, the production of medium-high temperature hot water often consumes a lot of power and fuel resources. Heat pump products have been widely used as a clean, efficient and stable heating equipment. Further improving the energy efficiency of heat pump equipment has important practical significance and social value for promoting energy conservation and emission reduction and improving economic benefits. [0003] The condensing temperature of the conventional medium-high temperature heat pump system is constant, and the normal temperature water is directly heated in the condenser, and the temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H4/02F25B1/10F25B30/02F25B40/06F25B41/06F24D3/18F25B41/30
CPCF24H4/02F25B30/02F25B1/10F25B40/06F24D3/18F25B41/30
Inventor 代宝民赵晓璇漆乐孙悦桐刘笑赵谱
Owner TIANJIN UNIV OF COMMERCE
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