Novel absorption type refrigeration and power-generation combining device

Abstract

The invention discloses a novel absorption type refrigeration and power-generation combining device. The device comprises an expander, a pre-cooler, a high-temperature salt absorbing bed and a low-temperature salt absorbing bed, wherein an alkali metal halide is filled in the high-temperature salt absorbing bed and the low-temperature salt absorbing bed; the high-temperature salt absorbing bed starts to desorb under the driving of an external heat source; after being subjected to thermal treatment, the desorbed refrigeration air is expanded in the expander to do work to generate power; the expanded refrigeration air is collected in the pre-cooler and is absorbed by the low-temperature salt absorbing bed under an environment heat sink cooling condition; the temperature and the pressure of the high-temperature salt absorbing bed are reduced under the environment heat sink cooling condition; and when the pressure of the high-temperature salt absorbing bed is lower than that of the low-temperature salt absorbing bed, under a pressure difference driving condition, the low-temperature salt absorbing bed starts to desorb, and the refrigeration effect provided by desorbing heat is released to a place requiring refrigeration through refrigerant circulation. Power generation and refrigeration are realized at the same time, and an evaporator, a condenser and a throttle valve are eliminated. The device is simple in structure and reasonable in design and can effectively meet the requirement on low-temperature heat source driving.

Description

technical field [0001] The invention relates to a refrigeration and power generation device, more specifically, to a combined system that can realize power generation and refrigeration at the same time by utilizing the adsorption principle. Background technique [0002] Rankine cycle, as a traditional thermal energy-driven power generation cycle, is currently widely used in biomass energy, solar energy, thermal power generation and nuclear power plants. However, in the process of applying the Rankine cycle to the variable temperature heat source, there is a bottleneck problem, that is, the isothermal evaporation process of the water working medium. In this process, the evaporation temperature of the constant water working medium cannot be compared with the changing heat source temperature. Fitting, thereby increasing the temperature difference during the heating process, resulting in the further improvement of its efficiency is limited. Thus, a so-called Kalina cycle has be...

AI Technical Summary

Problems solved by technology

The existing adsorption refrigeration power generation patent (CN200910048242.7) is almost two completely independent cycles, and there is a throttle valve in the adsorption refrigeration cycle, and the efficiency is relatively low

Images