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Convection heating and radiation heating, which heating method is better forlarge-space buildings?

time：2023-07-31
hits：1441次
source：正弘奧能

What is a large-space building?It refers to a building with a height greater than 5 meters and a volume greater than 10,000 cubic meters.There are many kinds of large-space buildings, such as hangars, production plants, warehouses, auditoriums, gymnasiums and so on.The heat transfer characteristics oflarge-space buildings mainly have the following three points:


	 


	· Large span, tall layer, large door and window area and large heat transfer coefficient of enclosure structure.


	· Large internal temperature gradient causes serious air stratification, resulting in large heat dissipation on the roof.


	· The doors and Windows of some buildings are frequently opened, resulting in cold air intrusion and increasing heat consumption.


	 


	Especially in the northern regions of our country, the winter in the northern regions is extremely cold, and these areas must be combined with advanced heating technology for heating large-space buildings.So for the heat transfer characteristics of tall space buildings, which heating method should be chosen?


	 


	At present, many large-space buildings are still using traditional convection heating methods such as heaters, serious heat loss, with air as the heat transfer carrier, the environmental temperature difference is unbalanced, the heated air is twice floating up and piled in the high altitude, the higher the space, the greater the temperature gradient, resulting in the temperature of the working area can not meet the production process requirements.Moreover, loud noise, fuel pollution of the environment, blowing warm wind dust, dry air, working environment comfort is not high.


	 


	In contrast, large-space buildings use radiant heating systems, which directly add the human body and objects in the room rather than heating the air in the room.In addition to ensuring thermal comfort, the heating interior design temperature can be reduced by 2-3 degrees compared with the traditional heating interior design temperature.This design reduces air delamination and reduces the temperature of the envelope, resulting in less heat transfer loss.Because it can meet the requirements of human comfort at such an ambient temperature, it can continuously create a good working environment, improve work efficiency, and save energy and environmental protection.


	 


	<img src="http://www.qxtxbbs.cn/Uploads/image/20230731/20230731101516_36163.png" alt="" /> 


	 


	At present, the proportion of radiant heat dissipation of various radiant heating methods in its heat dissipation is about: ceiling type 70% ~ 75%;Floor type 30% ~ 40%;Wall type 30% ~ 60%(increases with the height of the position of the radiant panel on the wall and the temperature of the wall).It can be seen that only in the ceiling type of radiation heating radiation heat release is the absolute advantage.


	 


	The hot water radiation panel of the ceiling is a heating system that uses the metal radiation panel combined with the tube and plate as the radiation source, uses hot water as the medium, and arranges the radiation panel in a series of strips and is installed in the form of the ceiling. It solves the problems of poor heating effect and high energy consumption in the convective way in the tall space.ECOPAN hot water radiation panel promoted and sold by Beijing Leadway Power Co., Ltd. is prefabricated into a standard length of 3 meters and 6 meters in the factory (special requirements can be prefabricated into 2 meters and 4 meters).Each radiant panel can be connected by quick joint or welding.Each radiant panel and collection pipe is prefabricated in the factory and tested for safety.The bracket of the suspension plate is welded together with the radiant plate, one per meter, which greatly guarantees the flexibility of the installation.


	 


	<img src="http://www.qxtxbbs.cn/Uploads/image/20230731/20230731101554_63986.png" alt="" /> 


	 


	ECOPAN hot water radiation plate covers the surface of more than 280°, increasing the heat transfer area, without long preheating time, heating speed.Hot water radiant panel has long service life and low maintenance cost.It does not require any special maintenance, but is insignificant compared to its energy-saving characteristics.It can be used in volatile and flammable built environments without the risk of fire and explosion.

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Convection heating and radiation heating, which heating method is better forlarge-space buildings?