Double-effect heat pump for injecting refrigerant steam at outlet of additional generator

Abstract

The invention relates to a double-effect heat pump for injecting refrigerant steam at an outlet of an additional generator, which consists of a high pressure generator, a low pressure generator, a first throttling valve, a condenser, a second throttling valve, an evaporator, an adsorber, a solution pump, a first solution heat exchanger, a second solution heat exchanger, a third solution heat exchanger, the additional generator, an injector and a third throttling valve. Driving steam which enters into the injector injects the low pressure refrigerant steam from the additional generator into steam with intermediate pressure and temperature and the steam with the intermediate pressure and temperature is used as a driving heat medium of the high pressure generator after entering the high pressure generator; value of the high-quality driving steam and the low temperature driving heat medium is sufficiently played; maximization of the energy-saving benefits is implemented; and the double-effect heat pump has strong adaptability and flexible regulation property, sufficiently makes up the defects of an adsorption heat pump and a steam injection heat pump and expands the application range of the heat pump technology in the field of energy saving.

Description

technical field [0001] The invention belongs to the technical field of low-temperature waste heat utilization and energy saving. Background technique [0002] Absorption heat pumps use thermal energy as power, and use the reverse Carnot cycle to transfer heat from low temperature to high temperature. It is especially suitable for occasions with a large amount of waste heat. The condensed state of waste heat can be gaseous or liquid. For the absorption heat pump with lithium bromide aqueous solution as the working medium, due to the physical properties of the working medium itself, the temperature and concentration of the solution itself are limited. In order to make the absorption heat pump operate in a reasonable temperature and concentration range and achieve the best Working efficiency, people have developed double-effect and triple-effect absorption heat pumps. At the same waste heat temperature, when the efficiency of the absorption heat pump increases, no matter which ...

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Problems solved by technology

However, since this type of heat pump can generally only recover steam, it cannot directly recover low-temperature liquid waste heat, such as the heat contained in low-temperature hot water, which greatly limits its application fields.

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