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Multistage compression and multistage condensation middle flash incomplete cooling medium/high-temperature heat pump system

A high-temperature heat pump and complete technology, applied in the field of heat pump, can solve the problems of large irreversible loss, large compression ratio, low system energy efficiency, etc., and achieve the effect of reducing construction cost, reducing pressure ratio and improving economic benefits

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 multi-stage compression, multi-stage condensation, intermediate flash evaporation incompletely cooling multi-temperature stage medium-high temperature heat pump system 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 and multistage condensation middle flash incomplete cooling medium/high-temperature heat pump system
  • Multistage compression and multistage condensation middle flash incomplete cooling medium/high-temperature heat pump system
  • Multistage compression and multistage condensation middle flash incomplete cooling medium/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 double condenser intermediate flash 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 in the two-stage pure compression double condenser with incomplete flash cooling is as follows 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 fluid enter...

Embodiment 2

[0039] Embodiment 2: The two ends of the first-stage condenser are connected in parallel for heating and hot water heating pipelines to form a two-stage compression double condenser intermediate flash evaporation incomplete cooling heat pump two-supply system, the system is as follows Figure 4 shown.

[0040] The heat supply terminal 10 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 10 enters the heat exchange fluid side of the first-stage condenser 4 and is heated to a certain level for the first time. temperature, 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 return water at the heating end is further heated for room heating , to achieve cascade utilization of heat and reduce heat loss. ...

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Abstract

The invention provides a multistage compression and multistage condensation middle flash incomplete cooling medium / high-temperature heat pump system. The system consists of an evaporator, each stage of compressors, each stage of condensers, each stage of throttle valves and each stage of gas-liquid separators, and comprises multistage continuous compression working medium heat pump circulation andnormal-temperature water continuous heating process; the multistage compression and multistage condensation middle flash incomplete cooling medium / high-temperature heat pump system can be set in multiple stages (called n stages for short) according to process demands; and the temperature rise is higher, more stages are set. Through multistage compression and multistage condensation process of refrigerants, normal-temperature water is continuously heated by multiple times, so that the irreversible loss of heat exchange with the refrigerants in the normal-temperature water heating process can be prominently reduced, and the compression ratio of each stage of compressors is lower. Heating hot water heating pipelines are connected between the condensers in parallel for room heating to achievegradient utilization of heat.

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 multi-stage compression, multi-stage condensation, intermediate flash evaporation and incomplete cooling. 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 temperature di...

Claims

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Application Information

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IPC IPC(8): F24H4/02F25B1/10F25B30/02F25B43/00
CPCF24H4/02F25B1/10F25B30/02F25B43/00
Inventor 代宝民刘笑赵晓璇漆乐赵谱孙悦桐
Owner TIANJIN UNIV OF COMMERCE
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