Low-temperature thermal source heat pump capacity regulation method

A capacity adjustment, low temperature heat source technology, applied in heat pumps, lighting and heating equipment, refrigeration components, etc., can solve the problems of system performance degradation, low air temperature, affecting indoor comfort, etc., to achieve less system start and stop, high efficiency, Air conditioning works well

Inactive Publication Date: 2005-11-02
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 thermal source heat pump capacity regulation 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 invention discloses a lower-temperature source heat pump capacity regulating method. The invention adopts mixture contains two or more components as coolant and changes concentration of circulating working fluid in system via disconnecting means. When heat pump operating load increases, system separates high boiling component from fluid via disconnecting means to increases concentration of circulating lower boiling working fluid and increases heating efficiency under low temperature environment. When heat pump operating load decreases, system draws high boiling component of high concentration from low-pressure fluid tank at the bottom of debonding unit and so reduces the heat-production amount. When system processes cold-production step, it can also change proportion of ingredients to meet the need of load variation.

Description

technical field [0001] The invention relates to a method for adjusting the capacity of a low-temperature heat source heat pump, which uses a heat pump system with variable refrigerant composition to expand the range and efficiency of the system capacity, and particularly relates to the expansion of the system's 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 temperature that people feel comfo...

Claims

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Application Information

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