Metal hydride refrigeration system and control method thereof

Abstract

The invention provides a metal hydride refrigeration system and a control method thereof. The control method of the metal hydride refrigeration system comprises the steps that the reaction time and the internal pressure of metal hydrides in a first reactor or a second reactor which conduct heat releasing are obtained; whether the reaction time is greater than or equal to a preset time threshold ornot is judged, and the internal pressure is less than a preset pressure threshold; and if yes, the flow directions of hydrogen in the first reactor and the second reactor are adjusted, and eight solenoid valves are driven to switch the state of a secondary refrigerant pipeline communicating with the first reactor, the second reactor, a first heat exchanger and a second heat exchanger. According to the scheme of the metal hydride refrigeration system and the control method thereof, the eight solenoid valves are utilized to make the first heat exchanger be kept communicating with the first reactor or the second reactor which conducts heat releasing, and make the second heat exchanger be kept communicating with the first reactor or the second reactor which conducts heat absorbing, and the working efficiency of the reactors is fully utilized.

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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