Two-stage injection heat pump type heat exchange unit

A heat exchange unit and ejector technology, applied in the energy field, can solve the problems that cannot be further reduced

Active Publication Date: 2011-10-26
北京华源泰盟节能设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the return water temperature of the primary network is limited by the heat demand of the user, it cannot be further reduced

Method used

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  • Two-stage injection heat pump type heat exchange unit
  • Two-stage injection heat pump type heat exchange unit
  • Two-stage injection heat pump type heat exchange unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, the two-stage injection heat pump heat exchange unit is composed of two-stage injection heat pumps, heat exchangers, connecting pipes, valves and other accessories. Among them, the connecting pipeline is divided into working medium pipeline system and waterway system, and the waterway system is further divided into primary side pipeline system and secondary side pipeline system. The two-stage ejector heat pump and the water-to-water heat exchanger are organically combined through connecting pipelines to form a two-stage ejector heat pump heat exchange unit. Among them, each stage of ejector heat pump is composed of generator, condenser, evaporator, ejector, regenerator, pump, connecting pipelines and valves and other accessories. The working medium circulation process of each stage of ejector heat pump: the high-pressure working medium liquid from the pump enters the generator, is heated by the hot water in the primary side pipeline, and gene...

Embodiment 2

[0029] Such as figure 2 As shown, the two-stage injection heat pump heat exchange unit is composed of two-stage injection heat pump, water-to-water heat exchanger WEX, connecting pipelines, valves and other accessories. The connection mode of the ejector heat pump pipeline and the primary side pipeline is the same as that of Embodiment 1.

[0030] The secondary side pipeline is produced in a mixed or series way. When the mixed connection mode is used, the fifth valve V 5 , the seventh valve V 7 closed, the third valve V 3 , the fourth valve V 4 , the sixth valve V 6 Open, the hot water in the secondary side pipeline is divided into two ways, one way of hot water flows through the third valve V in sequence 3 , into the second-stage ejector heat pump condenser C 2 After being heated by the heat pump working fluid, it flows through the sixth valve V 6 , into the first stage ejector heat pump condenser C 1 Heated by the heat pump working fluid, another way of hot water f...

Embodiment 3

[0032] Such as image 3 As shown, the two-stage injection heat pump heat exchange unit is composed of two-stage injection heat pump, heat exchanger WEX, connecting pipelines, valves and other accessories. The connection mode of the ejector heat pump pipeline and the primary side pipeline is the same as that of Embodiment 1.

[0033] The secondary side pipelines are connected in parallel or in series. When parallel connection is used, the sixth valve V 6 closed, the third valve V 3 , the fourth valve V 4 , the fifth valve V 5 , the seventh valve V 7 Open, the hot water in the secondary network is divided into three ways, and the hot water in one way passes through the fourth valve V 4 After entering the water-water heat exchanger WEX is heated by the hot water from the primary side pipeline, the other hot water passes through the fourth valve V 4 , the fifth valve V 5 Enter the first stage ejector heat pump condenser C 1 Heated by the heat pump working medium steam, th...

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Abstract

The invention relates to a two-stage injection heat pump type heat exchange unit, which belongs to the technical field of energy sources. The heat exchange unit provided by the invention comprises the accessories such as a two-stage injection heat pump, a water-water heat exchanger, a connecting pipeline, a valve and the like, wherein the water system of the connecting pipeline is divided into a primary side pipeline and a secondary side pipeline; the primary side pipeline adopts a series connection mode; the secondary side pipeline adopts a parallel connection, series connection or mixed connection mode. By means of an injection heat pump technique, the hot water heat of the primary side pipeline is utilized in a stepped mode; the backwater temperature of the primary side pipeline is greatly reduced; the backwater supply temperature difference of the primary side pipeline is increased; and the hot water heat transfer capability of the primary pipeline and the secondary pipeline is greatly enhanced. The two-stage injection heat pump type heat exchange unit provided by the invention can be used for recycling industrial waste heat, solar energy and the like to improve the waste heatrecycling rate and can be applied to the heat power station of a central heating system to improve the transmission capability of a primary heat network pipeline and reduce the irreversible loss in the heat exchange course.

Description

technical field [0001] The invention belongs to the field of energy technology, in particular to a two-stage injection heat pump heat exchange unit for heating and hot water supply. Background technique [0002] With the continuous increase of the scale of urban central heating and the improvement of urban volume ratio, the demand for heating load in northern cities and towns has increased sharply. Water needs to be transported over long distances, resulting in high energy consumption for pipeline network transmission, high pipeline network investment, and high central heating costs. In addition, with the continuous increase of urban floor area ratio, the heating area of ​​buildings in the original heating pipe network area has increased sharply, and the demand for heating load has increased sharply, which has highlighted the gap between the demand for heating in winter and the insufficient heat supply capacity of the heating network. contradictions between. The supply / ret...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B30/00
Inventor 孙方田王娜李德英史永征李光宇
Owner 北京华源泰盟节能设备有限公司
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