Low-grade heat-driven adsorption type refrigerating and heating pump circulating device adopting chemical reaction and method utilizing same

Abstract

The invention discloses a low-grade heat-driven adsorption type refrigeration and heat pump circulating device adopting chemical reaction and a method utilizing the same. The device comprises a refrigerant circulation loop, an adsorption loop, an analysis loop and an operating fluid circulation loop. The high-temperature high-pressure gaseous refrigerant ammonia gas and carbon dioxide analyzed byadsorbers enter a chemical reaction cooler to be absorbed by an operating fluid to generate ammonium carbamate, the heat is output, and the product is dissolved in the operating fluid; the mixed solution passes through a heat regenerator, a throttling device and enters a chemical reaction evaporator; the ammonium carbamate is decomposed to generate the ammonia gas and the carbon dioxide, the ammonia gas and the carbon dioxide are evaporated, the cold energy is output, the ammonia gas and the carbon dioxide are adsorbed and analyzed by the adsorbers to form a circulation, and the two adsorbersalternately adsorb and analyze through opening or closing a valve to realize continuous output of cold energy or heat energy. According to the device and the method, the reversible chemical reactionis used for realizing the refrigeration and heating, compared with phase-change refrigeration and heating, the device and the method is higher in performance coefficient, capable of realizing efficient utilization of low-grade heat energy and has no damage to the environment.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning equipment, and in particular relates to a low-grade heat-driven adsorption type chemical reaction refrigeration heat pump circulation device and method. Background technique [0002] At present, the methods of artificial refrigeration can be generally divided into two categories: physical methods and chemical methods, and most refrigeration methods belong to physical methods. Among them, refrigeration using the endothermic effect of material phase change is widely used. However, due to the influence of the thermodynamic properties of refrigerants, the cooling capacity per unit mass and coefficient of performance of phase change refrigeration are not high. Therefore, consider using chemical methods to achieve refrigeration. [0003] Ammonium carbamate is an intermediate product in the synthesis of urea, a white solid, unstable, and prone to decomposition when heated. The decomposition re...

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Problems solved by technology

Among them, refrigeration using the endothermic effect of material phase change is widely used. However, due to the influence of the thermodynamic properties of refrigerants, the cooling capacity per unit mass and coefficient of performance of phase change refrigeration are not high.

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