Passive sky radiation energy converter

Abstract

The invention discloses a passive sky radiation energy converter which comprises a frame and a radiation energy conversion module. The radiation energy conversion module is fixed to the frame and comprises multiple stainless steel flat tubular pieces connected side by side; a small-thickness channel for circulating water to flow is formed among the multiple stainless steel flat tubular pieces; a circulating water distributor and a circulating water collector communicate to two ends of the length directions of the multiple stainless steel flat tubular pieces; and the width directions of the stainless steel flat tubular pieces are connected side by side. According to the passive sky radiation energy converter provided by the invention, through the way of nocturnal sky radiation heat loss, the temperature of the circulating water flowing in the radiation energy converter can be effectively reduced, and the produced low-temperature water can be applied to a nocturnal radiation cold supplysystem, and can be directly applied to building cooling or used as an auxiliary cold source for other active air conditioner systems under the optimal meteorological condition. Meanwhile, the passivesky radiation energy converter provided by the invention has a function of daytime sun short wave heat collecting energy supply, and can be used for heating building supply domestic hot water.

Description

technical field [0001] The invention belongs to the technical fields of building environment and equipment engineering, building thermal environment and refrigeration engineering, and in particular relates to a passive sky radiation energy converter. Background technique [0002] In the field of air conditioning, low-energy refrigeration technology has become an important topic. Passive refrigeration technology, which directly obtains cooling capacity from the natural environment and consumes no or less primary energy, has been widely studied in domestic and foreign scientific and technological circles. Passive refrigeration is a refrigeration method that scientifically uses natural conditions (but does not exclude the application of fans or pumps) to achieve space temperature and humidity control. The atmosphere has different transmittance to electromagnetic waves of different wavelengths. The band with higher transmittance is called "atmospheric window", for example, 0.3-0...

AI Technical Summary

Problems solved by technology

[0003] Since the cooling performance of nighttime sky radiative cooling technology is affected by factors such as cloud cover, wind speed, and surrounding air temperature, and the cooling capacity of radiative coolers does not match the cooling load of buildings, there are few studies on nighttime sky radiative coolers.

One form of utilization is to use ordinary flat-plate solar collectors to operate at night and double as radiation coolers, and its cooling efficiency is very low; the other form of utilization is to use specially designed refrigerators with complex structures for long-wave radiation at night, and its cooling efficiency is somewhat lower. Increase, but the processing and maintenance costs are high, not suitable for practical engineering applications

[0004] In the existing public documents, such as the Chinese utility model CN203757934U discloses a space radiation refrigerator as an auxiliary cold source, which uses rivetless pressure riveting and adhesive to connect two galvanized steel sheets with point-shaped depressions to form a radiation refrigerator Module, galvanized steel coated with white titanium dioxide to enhance solar radiation reflectivity, radiant cooling at night only

Moreover, it has been found in practice that since the radiant cooler module is made of galvanized steel sheets, it needs to be riveted and connected with adhesive on the roof. Irregularity, gas accumulation, bulging, etc., which in turn cause problems such as glue opening and water leakage due to excessive local pressure or high sunlight temperature, which seriously affect the cooling efficiency and reliability of the radiant refrigerator

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