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Steam compression heat pump using water as working medium

A compression heat pump and steam technology, which is applied in the field of low-temperature waste heat utilization and refrigeration, can solve the problems of decreased performance index, low heat load of a single machine, and limited application scope, and achieves the effect of improving performance index and saving power consumption.

Inactive Publication Date: 2007-02-14
李华玉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current one-stage vapor compression heat pump has the following problems: ① Most of the working fluids used are compounds, which have many shortcomings in terms of price, safety, environmental protection, and thermal performance.
② The performance index is low, and the energy-saving benefit is affected; especially as a heat pump, when the heating temperature is high, the performance index drops significantly and is low
③Restricted by the safety of lubricating oil, as a heat pump, its heating temperature is relatively low (compared with absorption heat pumps), and its application range is limited; ④The heat load of a single unit is relatively low
⑤ High equipment cost and working medium price
The reasons for the above problems are: ① Generally, the vapor compression process is not adiabatically compressed, and the work consumed by the compressor is the largest, so the performance index of the heat pump is naturally relatively low, and with the increase of the compression ratio, the performance index of the heat pump drops rapidly
②Using compounds as working fluids, compared to naturally occurring high-quality and cheap water, their comprehensive performance is generally not good enough

Method used

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  • Steam compression heat pump using water as working medium
  • Steam compression heat pump using water as working medium
  • Steam compression heat pump using water as working medium

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0028] figure 2 Shown is the structure and process of the vapor compression heat pump provided by the present invention, using water as the working medium, using impeller compressors for two-stage compression and heat extraction between stages, reflecting the essence of the present invention. Structurally, this type of heat pump system is mainly composed of a primary compressor 1, a secondary compressor 2, a condenser 4, a throttle valve 5, an evaporator 6, an interstage heat extractor 7, and a regenerator 9. The waste heat fluid (a) enters and exits the evaporator 6 to complete the heating of the working medium (c) from the condenser 4, which is throttled and depressurized and cooled by the throttle valve 5, to generate low-pressure saturated steam, and its own temperature is reduced; The saturated steam from the evaporator 6 is properly superheate...

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Abstract

A heat pump of steam compression type in using water as working media is featured as using water as working media, applying impeller compressor, adding interstage heat taker between various stages of compressors to realize combination of staging compression and interstage heat-take for taking away heat built up by residual heat fluid and compression power consumption of heated fluid at said heat taker and condenser separately, adding heat regenerative unit to be used on superheat of low pressure steam for improving compression course.

Description

technical field [0001] The invention belongs to the technical field of low-temperature waste heat utilization and refrigeration. Background technique [0002] The use of heat pump technology for waste heat utilization is an effective means, which has relatively good energy saving, environmental protection and economic benefits; in terms of waste heat utilization, the temperature of many waste heat is also above 0 ℃, and the heating temperature requirement is higher. In such a field, appropriate working fluid and corresponding devices can be considered. [0003] Among the heat pumps used, the vapor compression heat pump is a relatively common device, which generally consists of a compressor, a condenser, a throttle valve and an evaporator, etc., and the working medium completes the heat pump cycle inside the device. The current one-stage vapor compression heat pump has the following problems: ① Most of the working fluids used are chemical compounds, which have many shortcomi...

Claims

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Application Information

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IPC IPC(8): F25B1/10
Inventor 李华玉
Owner 李华玉
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