Is floor heating harmful?
Does the thermal radiation of floor heating not hurt? Xie Jingchao, an associate professor in the Department of Building Environment and Equipment Engineering, Beijing University of Technology, said that floor heating is actually to evenly lay hot media, such as hot water pipes and cables, in the floor, and use the principle of thermal radiation to achieve the heating effect. According to different heating media, there are two kinds of heating media: liquid circulation system and electric floor heating.
In the circulation system, hot water is injected into the heating pipe to circulate and heat the whole floor. The principle is the same as the radiator, but it is transferred underground. Electric floor heating is to bury heating cables in the floor, convert electric energy into heat energy, and realize ground radiation heating.
Both liquid circulation system and electric floor heating will produce thermal radiation, which has also become the chief culprit of rumors affecting health! So is thermal radiation that terrible?
Professor Tao Wenquan, an academician of China Academy of Sciences and School of Energy and Power Engineering of Xi Jiaotong University, clearly pointed out in Heat Transfer that all objects in nature emit thermal radiation into space, and at the same time constantly absorb the thermal radiation of other objects, so that heat can be transferred between objects. It can be seen that thermal radiation is only a way of heat transfer, only thermal radiation can spread through vacuum, and sunlight also spreads to the earth through thermal radiation.
"If geothermal energy has thermal radiation, then heating equipment such as radiators and electric heaters also have thermal radiation." Associate Professor Xie Jingchao pointed out that people will only receive heat if they bask in the sun every day. There are no chemicals in this radiation, so it won't cause harm to people. Many people talk about the color change of "radiation", but they don't know that "thermal radiation" is actually "lying down and getting shot".
The impact on health is minimal.
It is rumored that the thermal radiation of floor heating can cause cataracts, but Sun Yuxin and others from the Institute of Labor Hygiene of Anshan Iron and Steel Group believe that there is no significant difference in the incidence of visual damage such as cataracts between steel workers working at high temperature and those who are not exposed to high temperature (the workshop temperature is as high as 38.56℃ ~40.69℃ and the humidity is 4 1.7%~57%). Obviously, when it comes to thermal radiation, the thermal radiation of floor heating at home is much lower than that of steel workshop, and it will not cause harm to human body at all.
It is rumored that thermal radiation can cause cardiovascular diseases such as hypertension. The Key Laboratory of Coal Mine Safety and Hygiene in Hebei Province investigated the health status of workers exposed to high-temperature radiation in the iron and steel industry, and compared the workers exposed to high-temperature radiation with those who did not. The results showed that the abnormal rate of hyperglycemia of workers exposed to high-temperature radiation was 65438 00% higher than that of normal people. However, according to the Indoor Air Quality Standard (GB/T 18883-2002), the indoor temperature of heating in winter is 16℃ to 24℃. There is no reason to worry about high blood sugar because the temperature in the workshop of steel works is much higher than the normal indoor heating temperature.
Professor Zhang, the chief physician of the Department of Cardiology, Beijing Hospital, said that floor heating can induce cardiovascular diseases, which makes no sense. Cardiovascular patients are most afraid of cold. When the weather is cold, blood vessels will contract reflexively. Older people with narrow blood vessels are more dangerous. High floor heating temperature can promote blood circulation. Associate Professor Xie Jingchao said that compared with heating and air conditioning, the advantage of floor heating is that it meets the demand of "cold head and hot feet" of human body, and feet will feel comfortable first. It can be seen that the cardiovascular disease induced by floor heating is also nonsense.
Rumor has it that thermal radiation can cause leukemia. The reporter searched Wanfang Database and China Knowledge Network, but found no relevant data and research papers.
Professor Jia Liqun from the Oncology Department of China-Japan Friendship Hospital said that if floor heating can cause leukemia, there is a possibility that it is caused by volatile substances in indoor decoration materials. There is volatile formaldehyde in the compound floor glue. When the indoor temperature rises, formaldehyde will evaporate faster, which is harmful to health. This has nothing to do with floor heating. You can't "hit the wrong board" and blame the geothermal heat. Let the decoration meet the safety standards.
The above is what Bian Xiao told you about floor heating. I think everyone has a good understanding of floor heating after reading it. Floor heating is still recognized by everyone in our life, because the effect of floor heating in heating is very good. Especially in the cold north, it needs floor heating. Floor heating has many characteristics, such as uniform heat dissipation, comfort, excellent environmental protection performance, cleanliness, excellent heating performance and long service life. In addition, it also has very good thermal insulation performance, simple process, fast construction speed and low use cost. Therefore, floor heating is now used in apartments, family houses, schools, libraries and so on.