A double-layer phase change energy storage radiant air conditioning system based on ventilated walls

Abstract

The invention discloses a double-layer phase change energy storage radiation air-conditioning system based on ventilation wall bodies. The system comprises the ventilation wall bodies, radiation plates and a roof, wherein each ventilation wall body comprises a transparent cover plate, a ventilation sandwich layer and a heat accumulation wall body; the transparent cover plate comprises a ventilation hole I and a ventilation hole II; the ventilation sandwich layer comprises a filtering net and an air regulation valve; the filtering net is arranged in a position, with the distance being 300mm away from the ground, at the lower side of the ventilation sandwich layer; the heat accumulation wall body is arranged at the right side of the ventilation sandwich layer; the heat accumulation wall body is provided with an air valve I and an air valve II; the air valve I is arranged at the lower side of the heat accumulation wall body; a dehumidification device is arranged at an inlet part of the air valve I; the air valve II is arranged at the upper side of the heat accumulation wall body; the radiation plates are arranged at the right side of the ventilation wall body; and the air regulating valves are positioned in the ventilation sandwich layer of a floor slab. The system has the advantages that the effects of no wind sense and no flying dust can be achieved; the indoor cleanness and sanitation can be ensured; meanwhile, the energy consumption of the system is reduced; and the operation cost of a building body is reduced.

Description

technical field [0001] The invention belongs to the field of building air-conditioning and ventilation technology and energy application, and in particular relates to a double-layer phase-change energy storage radiation air-conditioning system based on a ventilation wall. Background technique [0002] According to relevant national statistics, my country's building energy consumption accounts for 30% of the total energy consumption, and the energy consumption of HVAC systems accounts for more than 60% of building energy consumption. In order to reduce the energy consumption of the building envelope, Trombe walls are often used at home and abroad, thereby reducing energy consumption to a certain extent. The Trombe wall, referred to as the heat collecting wall, is the most typical component of the heat collecting and heat storage wall type passive solar house. A solar heat collector. On the one hand, the Trombe wall uses sunlight to shine on the dark thermal storage wall wit...

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Problems solved by technology

[0003] But the traditional Trombe (Trombe) wall also has certain problems in its application: during the day in winter, the surface temperature rise of the thick thermal storage wall is relatively slow; Outdoor heat transfer produces large heat loss; during the day in summer, due to the high surface temperature of the heat storage wall, the indoor is prone to overheating; therefore, it can be seen that the intensity of solar energy changes periodically and intermittently, resulting in a low utilization rate of solar energy

Among them, the first patent is formed by connecting three phase-change layers, and it is set to a state where the phase-change temperature of the phase-change layers decreases sequentially from south to north, but there are many phase-change layers in this patent. The heat storage time of the external wall will be extended, and the indoor thermal environment cannot be flexibly controlled; the heat storage wall source-air source heat pump system in the second patent uses a separate and independently controlled wall source heat exchanger and air duct air heat exchanger, and the wall source The heat exchanger is placed in the thermal storage wall to ensure that the thermal storage wall source-air source heat pump system works continuously and efficiently at night or on cloudy days in the heating mode, and the condensation heat released when it works in the cooling mode heats the air duct The air is used to strengthen the natural ventilation of the solar wall, but the related equipment is placed between the glass cover plates, which greatly occupies the effective space of the building, which is not conducive to construction and large-scale promotion; the third patent uses the temperature difference between water supply and drainage return pipes A heat exchange device is formed, and then the wallboard is exchanged for heat through the heat exchange device, and the indoor temperature is adjusted by means of radiation and convective heat exchange. It has the characteristics of convenient installation and quick maintenance, but the heat exchange device of the patent The efficiency is not high, and the indoor thermal comfort cannot be guaranteed stably; the fourth patent uses a phase-change energy storage module, which cannot well overcome the shortcomings of the traditional Trombe wall, and it is difficult to ensure that it can be used in both summer and winter. Maintain a better indoor thermal comfort environment; from the above inventions, phase change materials have good development prospects for wall heat storage (cold)

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