Solar heat pump drying system

Abstract

The invention discloses a solar heat pump drying system, which comprises a solar hot-water system, a metal hydride heat pump system and an air drying system that are coupled with one another. The solar hot-water system adopts a forced circulation hot water system, heat energy collected from a solar collector is used as energy driving the metal hydride heat pump system to circulate, and heat energy and cold energy generated when a metal hydride heat pump absorbs and releases hydrogen are used as heat source and cold source of an air heater and an air cooler. Air in the drying chamber is pressurized by an axial-flow fan to be separated out moisture through the air cooler and is heated to required temperature by the air heater respectively, and is sent back to the air drying chamber to complete the drying process. The solar heat pump drying system uses the advantages of solar energy and hydrogen energy simultaneously, and has the characteristics of cleanness, high efficiency, energy conservation, high dehumidification rate, wide application range of drying temperature, accurate control of drying temperature, coupled application with other solar utilization device, and the like.

Description

technical field [0001] The invention relates to solar energy application technology, chemical heat pump, drying technology, gas-solid reactor for heating and cooling, and in particular to a solar heat pump drying system. Background technique [0002] Drying is widely used in industrial and agricultural production and consumes a lot of energy. Countries all over the world are doing a lot of research on energy-saving technologies for drying processes. As a new energy-saving technology, the heat pump drying system has gradually become a research hotspot because it has obvious advantages in energy consumption and drying cost compared with conventional airflow drying. The heat pump drying system is a dehumidification and drying equipment that does not use electric heating wire heating or other heat source radiation heating. The traditional heat pump drying system is similar to the ordinary refrigeration system. Through the continuous operation of the compressor and the expansion...

AI Technical Summary

Problems solved by technology

(Chen Dong, Xie Jihong. Heat pump technology and its application [M] Beijing: Chemical Industry Press, 2006: 267-273) This type of heat pump drying system has the characteristics of simple structure, compact, convenient operation, and wide application range; As a working medium, Freon has a destructive effect on the environment, and uses electric energy as the driving energy of the heat pump system, resulting in a low average dehumidification rate SMER (kg / kWh)

This becomes the main disadvantage of applying this type of heat pump

[0004] (2) CO 2 Heat pump drying system: In order to solve the problem that the traditional heat pump drying system has a destructive effect on the environment, relevant personnel proposed a method using CO 2 Heat pump drying system as working fluid

[0008] To sum up, due to various defects, the existing heat pump drying system still has a lot of room for development in terms of system design, environmental protection, and energy saving, and cannot effectively achieve the goals of energy saving, cleanliness, and high dehumidification rate.

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