Fresh air multi-level treatment system for soil and phase change material coupling energy storage and operation method

Abstract

The invention discloses a fresh air multi-level treatment system for soil and phase change material coupling energy storage and an operation method. The system comprises a fresh air treatment module,a soil energy storage module, a phase change energy storage module and a heat pump module. The four modules are connected through control valve groups to form a complete system. The operation method for controlling the system comprises the step that since the system has four operation modes including the ventilation mode, the dehumidification mode, the dehumidification cooling mode and the heatingmode, the operation mode is judged according to outdoor air temperature and humidity parameters. According to the system, a dual-level phase-change technology is used for solving the problem of colddiffusion during phase-change cold storage, gradient utilization of energy is achieved to the greatest limit through a multi-level fresh air treatment mode so as to reduce the application amount of aphase change material, and the investment cost is reduced.

Description

technical field [0001] The invention relates to a fresh air treatment system and an operation method, in particular to a fresh air multi-stage treatment system and an operation method for coupled energy storage of soil and phase change materials, and belongs to the technical field of building environment and energy application. Background technique [0002] The vast central and southern regions of my country belong to hot summer and cold winter or hot summer and warm winter areas. In order to create a comfortable indoor hot and humid environment, a large amount of energy needs to be consumed for the operation of the air conditioning system. At present, my country's building energy consumption accounts for about 30% of the total national energy consumption, while the energy consumption of air conditioning systems accounts for more than 60% of building energy consumption. With the development of social economy, people's requirements for comfortable environment are getting high...

AI Technical Summary

Problems solved by technology

[0008] (1) The cold diffusion problem of phase change cold storage: due to the large time span across seasons, the temperature difference between phase change cold storage materials and the external environment causes a large proportion of cold loss

Some scholars have proposed that phase change materials be buried in the underground constant temperature layer to reduce the loss of cooling capacity, but the resulting cold storage in the soil has the risk of destroying the ecological environment of the underground soil, and may even lead to changes in geological structure and obstruction of groundwater flow. Serious adverse consequences such as interruption;

[0009] (2) To fully use phase change cold storage to realize fresh air load and indoor humidity load, the volume of phase change material required is also relatively large. Taking the ordinary residence of a family of three in Changsha as an example, it is necessary to use phase change material to handle fresh air load and indoor humidity load. Indoor wet load, the required volume of phase change material (take water as an example) exceeds 100 cubic meters, and the cost of its technical implementation is also very high

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