A ground source heat pump system and operation method for obtaining heat from the environment

Abstract

The invention provides a ground-source heat pump system obtaining heat from the environment and an operation method thereof, and belongs to the field of heat supply air conditioners. According to the system, a second heat exchanger and an accessory of the second heat exchanger are additionally arranged on the basis of a conventional ground-source heat pump, and the functions of heating and air conditioning, yearly domestic hot water supply and non-heating period heat compensation can be achieved. Different operation modes of the second heat exchanger can be achieved according to different climate and load characteristics. In a non-heating period, if the outdoor temperature is too high, the second heat exchanger obtains heat from the environment and compensates for soil with heat after the temperature of heat is raised by a heat pump unit; if the outdoor temperature is further raised or the solar radiation is too strong, the second heat exchanger can directly obtain heat from the environment and compensates for the soil with heat, and in the non-heating period or the early heating period or last heating period, the second heat exchanger can obtain heat from the environment and supply domestic hot water or heat to users after the temperature of heat is raised by the heat pump unit. The second heat exchanger can effectively maintain yearly heat balance of soil for the ground-source heat pump in the northern area by increasing heat compensation and reducing heat obtaining with low initial investment and high energy-saving performance, and it is guaranteed that the system stably and efficiently operates for a long time.

Description

technical field [0001] The invention relates to a soil source heat pump system and an operation method for obtaining heat from the environment, and belongs to the field of heat supply and air conditioning. This technology can effectively solve the soil heat imbalance problem of the soil source heat pump system in the northern region, and maintain the stable and efficient operation of the system for many years. It is especially suitable for the northern region where the building heat load is large and dry and lack of water. Background technique [0002] The northern region of my country mainly adopts the centralized heating method based on fossil fuel combustion. The overall energy efficiency of this method is not high, resulting in a large energy consumption, and the emission of pollutants exacerbates the appearance of smog to a certain extent. Ground source heat pumps use soil as low-level energy, and the system performance is less affected by temperature and has strong ada...

AI Technical Summary

Problems solved by technology

When the ground source heat pump is applied to buildings in the northern region where the heat load is the main component, the system’s annual accumulative heat intake from the soil is significantly greater than the heat output, which will cause the soil temperature to drop, and then the system’s performance will decline, or even fail to operate.

In the existing solutions, increasing the number of buried pipes and increasing the distance between buried pipes will increase the initial investment and can only slow down the drop in soil temperature, but cannot fundamentally solve the problem of soil thermal imbalance; adding solar collectors as an auxiliary equipment, which will bring higher initial investment and poor operational reliability

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