Metal hydride refrigeration system and control method thereof

Abstract

The invention provides a metal hydride refrigeration system. The metal hydride refrigeration system comprises a first reactor, a second reactor, an electrochemical compression device and a secondary refrigerant circulating device, wherein the first reactor is filled with a metal hydride for heat release or heat absorption by using hydrogen absorbing and hydrogen removing reactions of the metal hydride; the second reactor is also filled with the metal hydride for heat release or heat absorption by using the hydrogen absorbing and hydrogen removing reactions of the metal hydride; the electrochemical compression device is arranged between the first reactor and the second reactor, and is configured to adjust the hydrogen flowing direction and the pressure according to operation states of the first reactor and / or the second reactor, so that the first reactor and the second reactor alternately perform heat release and heat absorption; the secondary refrigerant circulating device is providedwith a secondary refrigerant pipeline and at least one heat exchanger, wherein the secondary refrigerant pipeline respectively communicates with the first reactor, the second reactor and the heat exchangers; and a secondary refrigerant therein is used for transmitting heat of the first reactor and / or the second reactor to the heat exchangers so as to realize continuous refrigeration.

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] Under certain temperature and pressure, some alloys and metal compounds can reversibly react with hydrogen to form metal hydrides. The characteristic of the reaction between the hydrogen storage alloy and hydrogen is that heat is released when hydrogen is absorbed, and hydrogen is released when the heat is absorbed. Both the hydrogen absorption reaction and the hydrogen desorption reaction are related to the temperature, pressure and alloy composition of the system. The thermal effect of the reaction between metal hydride and hydrogen can control the direction of the reaction by adjusting the pressure to realize the conversion of heat energy. [0003] The above reaction characteristics make metal hydrides widely used in the field of energy conversion and utilization. Some metal hydride refr...

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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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