Energy supply device and method for power generation, refrigeration and heating of buildings through medium-and-low temperature geothermal water

Abstract

The invention discloses an energy supply device and method for power generation, refrigeration and heating of buildings through medium-and-low temperature geothermal water. The device is mainly provided with an organic Rankine cycle power generation, two-stage lithium bromide absorption refrigeration and direct heat exchange subsystem, and the subsystem is connected with a valve through a pipe so as to form a geothermal water cascading combined supply system. To meet the requirements of energy consumption buildings for refrigeration, heating and power in different seasons, a geothermal water energy-supply loop supplies geothermal energy to different subsystems through valve control, and the buildings can be supplied with power and cold air in summer, power and hot air in winter, and power and domestic hot water in the transitional seasons, so that cascading integrated utilization of medium-and-low temperature geothermal energy is achieved, and the utilization rate of geothermal water is increased. By means of cascading of cold sources at the heat dissipation ends of the subsystems, the heat dissipation amount of the subsystems is recycled reasonably and effectively, thermal loads for building heating or domestic hot water are met, and the thermodynamics perfect degree of a gradient utilization system is increased. The power energy device has the remarkable effects for reducing emission of pollutants and building low-energy-consumption buildings.

Description

technical field [0001] The invention relates to a power generation, refrigeration and heating building energy supply system for cascade utilization of geothermal water, in particular to geothermal utilization subsystems such as a geothermal organic Rankine cycle power generation system, a geothermal two-stage lithium bromide absorption refrigeration system, and a geothermal direct heat exchange system integration. And according to the different load demands of the building in different seasons, the valves are switched and different cascade operation modes are set to realize the cascaded comprehensive utilization of medium and low temperature geothermal energy in building energy supply. Background technique [0002] The continuous and rapid growth of the world economy has brought about an increasing shortage of fossil resources such as coal, oil, and natural gas. At the same time, environmental problems such as the greenhouse effect produced by the excessive consumption of e...

AI Technical Summary

Problems solved by technology

There are various forms of geothermal utilization in my country. Although the development and utilization of geothermal water in my country has made considerable progress, there is still a large gap in the technical means of geothermal utilization compared with foreign countries. This is mainly reflected in the fact that most geothermal utilization in my country is for heating and bathing. Mainly direct utilization, high temperature of discarded water for geothermal utilization, large amount of discarded water, low thermal energy utilization rate and relatively backward equipment level for geothermal utilization

Images