Optimized design method of solar ground source heat pump system

Abstract

The invention discloses an optimized design method of a solar ground source heat pump system. The optimized design method comprises the following steps of: (1) calculating cold-heat load of an end user and dividing the cold-heat load into cold-heat load intervals; (2) determining the value ranges of an area A of a heat collector and a depth L of drilling; (3) determining the heat absorbing amount and the heat releasing amount of a heat exchanger of the buried pipe; (4) calculating to obtain an optimal area Adesign of the heat collector and an optimal drilling depth Ldesign; (5) carrying out optimized design construction of the solar ground source heat pump system according to the optimal result obtained from calculation in the step (4). The optimized design method disclosed by the invention has the advantages that the optimal solutions of the area of the heat collector and the drilling depth are determined by simulated calculation for different constriction conditions and the minimum absolute value of the difference between the heat absorbing amount and the heat releasing amount in the step (4), so that the average temperature of soil can be furthest stabilized, higher overall operation efficiency of the system can be ensured, simultaneously the influence of the solar ground source heat pump system to the environment can be reduced to be lowest, and sustained development and long-term full and reliable operation are realized.

Description

technical field [0001] The invention relates to a design method for a solar ground source heat pump system, in particular to an optimal design method for a solar ground source heat pump system. Background technique [0002] Due to the low soil temperature, large heat load and long heating time in the northern region, the ground source heat pump system is used alone, and the heat absorbed by the buried tube heat exchanger to the soil is greater than the heat released, the average temperature of the soil drops, and the system efficiency drops. The proposal of the solar ground source heat pump system solves this problem very well. However, my country only has design specifications for a single ground source heat pump system ("Ground Source Heat Pump System Engineering Technical Specification") and a single solar system ("Solar Heating Engineering Technical Specification"), and has not yet issued relevant regulations for solar ground source heat pump systems. design specificatio...

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Problems solved by technology

However, my country only has design specifications for a single ground source heat pump system ("Ground Source Heat Pump System Engineering Technical Specification") and a single solar system ("Solar Heating Engineering Technical Specification"), and has not yet issued relevant regulations for solar ground source heat pump systems. design specification

In practice, the selection of drilling depth and heat collector area is chaotic, which makes the heat absorption and release of the soil unbalanced, and the overall operating efficiency of the system is low, causing some designed systems to fail to operate normally. Therefore, reasonable design of drilling depth and heat collection The area of ​​the device is of great significance to the solar ground source heat pump system

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