Refrigerating system of metal hydride and controlling method of refrigerating system

Abstract

The invention provides a refrigerating system of metal hydride and a controlling method of the refrigerating system. The controlling method of the refrigerating system includes the steps that the response time of the metal hydride in a first reactor and / or a second reactor is obtained; according to the response time, hydrogen flow direction in the first reactor and / or the second reactor is adjusted, so that the first reactor and the second reactor carry out heat releasing and heat absorbing separately and alternately; eight electromagnetic valves are driven to switch between a state that a refrigerating medium pipeline communicates with the first reactor, and the second reactor; and a state that a refrigerating medium pipeline communicates with a first heat exchanger and a second heat exchanger, so that the first heat exchanger is kept communicating with the first reactor or the second reactor which conduct heat releasing, as well as the second heat exchanger is kept communicating withthe first reactor and the second reactor which conduct heat absorbing. According to the refrigerating system of the metal hydride and the controlling method of the refrigerating system, the eight electromagnetic valves are used to switch the connecting relationship between the first heat exchanger, the second heat exchanger and the first reactor and the connecting relationship between the first heat exchanger, the second heat exchanger and the second reactor, and working efficiency of the reactors are fully used.

Description

technical field [0001] The invention relates to refrigeration equipment, in particular to a metal hydride refrigeration system and a control method thereof. Background technique [0002] At present, in order to solve the energy crisis and protect the environment, people pay more and more attention to the research and application of hydrogen energy. Hydrogen has the advantages of high calorific value per unit mass, wide sources, clean and efficient, etc. Under certain temperature and pressure, metal hydrides (also known as hydrogen storage alloys) can reversibly absorb, store and release hydrogen under certain temperature and pressure. The reaction between metal hydrides and hydrogen is characterized by heat release when absorbing hydrogen, and release of hydrogen when absorbing heat. Both the hydrogen absorption reaction and the hydrogen release reaction are related to the temperature, pressure and alloy composition of the system. The thermal effect of the reaction between ...

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Problems solved by technology

[0003] The above reaction characteristics make metal hydrides widely used in the field of energy conversion and utilization. Some metal hydride refrigeration systems have appeared in the prior art. As a novel heat conversion system, these systems have the advantages of environmental protection, safety and silence, but There are also some problems that affect the popularization and use of this type of refrigeration system. Metal hydrides need to alternately absorb and dehydrogenate, resulting in only intermittent refrigeration and low heat utilization efficiency.

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