Solar-air-geothermal multisource dual-machine heat pump heat supply and air conditioning composite system

Abstract

The invention discloses a solar-air-geothermal multisource dual-machine heat pump heat supply and air conditioning composite system, relates to a heat supply, air conditioning and refrigerating composite system which takes solar energy, air and a ground source heat pump of a buried tube as cold and heat sources, and belongs to the technical field of building environment, equipment engineering and refrigeration engineering. The system comprises a solar thermal collector (1), the buried tube (3), a heat storage water tank (13), a heat storage / exchanger water tank (17), a control system, an end user (16) and the like. The invention provides a multisource dual-compressor heat pump system which takes the solar energy, geothermal energy and air as the cold and heat sources; and the system can supply heat in winter, refrigerate in summer and supply hot water for daily life all year round. Moreover, the overheat of the solar thermal collector in summer is avoided, so that the heat of the solar energy is stored in soil for use in the winter; and the system particularly has higher applicability in the area in which heat load in the winter is greater than cold load in summer.

Description

technical field [0001] The invention relates to a heating, air-conditioning and refrigeration composite system using solar energy, air, and ground-buried pipe ground-source heat pumps as cold and heat sources, and belongs to the technical fields of building environment and equipment engineering and refrigeration engineering. Background technique [0002] At present, energy shortage and environmental pollution have become two prominent problems restricting global sustainable development, which have attracted the attention of countries all over the world. Therefore, vigorously developing and utilizing renewable energy has become an effective development strategy for all countries. The renewable energy that can be utilized mainly includes solar energy, ground energy and air energy. In addition, with the development of society and the improvement of people's living standards, energy consumption for heating, air conditioning and domestic hot water accounts for an increasing prop...

AI Technical Summary

Problems solved by technology

However, these three have their own shortcomings in application: solar energy is affected by the intensity of sunlight and cannot maintain a constant value, and backup energy must be provided; the utilization of ground energy is limited by the area occupied, and air energy is also affected by ambient climate conditions. Impact

But there is a problem with this heat exchanger: the temperature of the hot water provided by solar or ground energy is sometimes opposite to that of the air, for example, the temperature of the hot water provided is greater than the temperature of the refrigerant, while the temperature of the air is lower than the temperature of the refrigerant This reduces the energy efficiency of the refrigerant

Moreover, for heat pump units, the refrigerant parameters are different for the heat exchangers on the air source side and water source side. If the air source and water source are forced to be placed together, the performance of the compressor may be affected.

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