Metal hydride refrigerating system and control method thereof

Abstract

The invention provides a metal hydride refrigerating system and a control method thereof. The metal hydride refrigerating system comprises a first reactor, a second reactor, an electrochemical compression device and a refrigerating medium circulating device, wherein the first reactor and the second reactor release heat or absorb heat through hydrogen absorption reaction and dehydrogenation reaction of metal hydrides; the electrochemical compression device is arranged between the first reactor and the second reactor; the refrigerating medium circulating device is provided with a refrigerating medium pipeline and at least one heat exchanger; the electrochemical compression device can be used for regulating hydrogen gas flow directions of the two reactors, one reactor performs hydrogen absorption reaction and the other reactor performs dehydrogenation reaction, and the two reactors alternatively release heat and absorb heat; and moreover, the refrigerating medium circulating device exchanges heat with the reactors. According to the scheme adopted by the invention, real-time regulation is performed according to operation time and operation states of two reactors, so that control is flexible, continuous refrigerating or heating is realized, and heat energy conversion capability of the reactors is sufficiently 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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