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Low temperature heat source heat pump system and its capacity regulating method

A heat pump system and low-temperature heat source technology, applied in heat pumps, lighting and heating equipment, refrigeration components, etc., can solve problems such as system performance degradation, affecting indoor comfort, and low air temperature, so as to achieve less system start-up and stop, and better air-conditioning effects , high efficiency effect

Inactive Publication Date: 2004-07-21
ZHEJIANG UNIV
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  • Abstract
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  • Claims
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Problems solved by technology

In addition, heat pumps work in low temperature environments to heat the air temperature is lower than people feel comfortable temperature
Similarly, when the heat pump is used for cooling purposes, the change in the indoor and outdoor ambient temperature will cause a change in the cooling demand, otherwise it will affect the indoor comfort and cause a decline in system performance

Method used

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  • Low temperature heat source heat pump system and its capacity regulating method
  • Low temperature heat source heat pump system and its capacity regulating method

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Embodiment Construction

[0014] Since the system of the present invention adopts a variable capacity mode, more refrigerants need to be used than conventional systems, and excess volume needs to be stored during operation. In order to achieve this purpose, the system uses a high-pressure liquid storage tank 5 and a low-pressure liquid storage tank 16. In the low-pressure liquid storage tank 16, the excess refrigerant mixture with a high boiling point relative to the system circulation concentration is stored. In the high-pressure liquid storage tank 5 holds excess refrigerant at the same concentration as the system.

[0015] According to the present invention, the heat pump system uses a certain amount of two (multiple) component non-azeotropic mixed refrigerants sufficient to realize the system capacity, and one (or more) components in the refrigerant have a higher boiling point than other components in the mixture ; A rectification column 15 feeds the low-pressure liquid storage tank 16 and removes ...

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Abstract

The method applies refrigerant mixed by two or above compositions to change circulating media concentration through a separation unit; when load is increased at heat pump operation system separates composition of high boiling point through separation unit to raise concentration of low boiling point media in circulation for enhancing ability of heating at low temperature environment; when load is decreased high boiling point composition of high concentration stored in low pressure liquid storage tank at bottom part of separation unit is absorbed systematically through heating means to decrease heat generating amount of system.

Description

technical field [0001] The invention relates to a low-temperature heat source heat pump system and its capacity adjustment method. The heat pump system with variable refrigerant composition is used to expand the range and efficiency of the system capacity, and especially relates to the expansion of the system heating capacity when the ambient temperature is lowered. Background technique [0002] Heat pump systems are usually bi-directional, meaning they are capable of either heating or cooling, or sometimes both at the same time. Current residential and small commercial air source heat pump systems powered by electricity have two limitations in operation and performance. Primarily, they do not have sufficient capacity at low temperatures, so supplementary heat sources such as electrical resistance heating or oil combustion must be utilized. In addition, heat pumps work in low temperature environments to heat the air temperature below the temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B30/02F25B30/06
Inventor 陈光明陈斌王勤洪峰
Owner ZHEJIANG UNIV
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