An adsorption heat pump refrigeration power co-supply method

Abstract

An adsorption heat pump refrigeration / power cogeneration method, per which a scheme of direct expansion is utilized, work medium vapor produced via desorption by a first absorption bed (1) is allowed to expand, work, and depressurize directly in a first expander (3), exhaust steam discharged by the first expander (3) is absorbed of heat by an evaporator (4) and evaporated, a refrigerant liquid is thus allowed to evaporate into low-pressure vapor, and the low-pressure vapor is introduced into a second adsorption bed (6) to be adsorbed of released heat. The exhaust temperature of the first expander (3) can be less than the ambient temperature. With the exhaust temperature reduced, the efficiency of a steam-powered apparatus is increased. System efficiency is higher compared with a hybrid power system consisting of organic Rankine steam cycles. Adsorbed heat can also be utilized to produce steam as a driving heat source; hence, a self-driven system is implemented, the need for a high-temperature driving heat source is obviated, only a single low-grade heat source is required, and, refrigeration, heating, and power supply can be implemented simultaneously. This is a low-carbon environmentally friendly heat, refrigeration, and power cogeneration apparatus.

Description

technical field [0001] The invention relates to a power supply method and belongs to the technical field of thermal power. Background technique [0002] For general steam power output devices (steam engines, steam turbines), the thermal efficiency of steam expansion work is affected by initial temperature, initial pressure, exhaust steam temperature, and exhaust steam pressure. [0003] When the initial temperature is constant, the higher the temperature difference, the higher the efficiency. The higher the initial pressure, the higher the efficiency. When the initial temperature is constant, the lower the exhaust temperature, the higher the efficiency; the lower the exhaust pressure, the higher the efficiency. [0004] Since the steam power plant expands and does work, it will generate flashing steam, which needs to be condensed into working liquid to make the cycle go on. Therefore, the exhaust temperature of the steam power plant generally needs to be higher than the a...

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Problems solved by technology

[0005] Secondly, because the low-grade heat source cannot provide a high initial temperature, and the exhaust steam temperature must be higher than the ambient temperature, the steam power mechanical efficiency of the low-grade heat source is low, and the practical value is low

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