Phase change energy storage fresh air system for cold and hot pretreatment

Abstract

The invention discloses a phase change energy storage fresh air system for cold and hot pretreatment. The system comprises an energy storage module, a water circulation module, an automatic control module and a monitoring module. The energy storage module is composed of a heat preservation shell, a heat exchange coil pipe, a phase change energy storage pipe array structure and a draught fan. The water circulation module comprises a closed cooling tower, a solar heat collection plate, a circulation water pump, a circulation pipeline and a three-way valve set. The monitoring module is used for monitoring the outlet water temperature of the cooling tower, the outlet water temperature of the solar heat collection plate, and the temperature of phase change materials in phase change energy storage pipes. A monitoring device controls the cooling tower, the solar heat collection plate and the energy storage module to be switched on or off according to the monitored temperature. The system canbe used in both winter and summer, efficient utilization of the phase change materials is achieved, the energy saving effect is achieved, and the requirements for fresh air pre-cooling in summer and pre-heating in winter are met.

Description

technical field [0001] The invention belongs to the technical field of air-conditioning fresh air systems, in particular to a fresh air system for cooling and heating pretreatment phase change energy storage. Background technique [0002] The fresh air system uses the fresh air unit to send outdoor air into the room, forming a fresh air flow field indoors, so as to meet the needs of indoor fresh air ventilation and improve indoor air quality. At present, for most air-conditioned buildings in China, the fresh air load has accounted for 20% to 30% of the total HVAC load. Therefore, how to make the fresh air system have the characteristics of building energy saving and realize the effective use of renewable energy is crucial for building fresh air systems. development is of great significance. [0003] Phase change materials are materials with energy storage functions. Among them, organic phase change materials have the advantages of high energy storage density, large storage ...

AI Technical Summary

Problems solved by technology

[0004] After searching the existing technology, it is found that Chinese patent document number CN 109458654 A records a phase-change energy storage type solar fresh air heating system, which combines the solar fresh air heating system and the thermal storage system to provide heating and water for buildings demand, but the system cannot be applied to the working condition of fresh air precooling in summer, which limits the energy-saving effect, and the heat exchange efficiency of the combination of phase change energy storage and fresh air is low, and the expected implementation effect is poor; patent document number CN 102914010 A records A high-efficiency heat exchange system for fresh air with phase change energy storage based on solar energy is developed, which integrates solar collector panels, phase change energy storage, heat pipes and fresh air into one system to increase the temperature of the air supply in winter, and the use of heat pipes can improve the fresh air and fresh air. The heat exchange efficiency between phase change materials, but this system is also not suitable for summer fresh air pre-cooling conditions, and the investment is relatively high

Images