Temperature reduction of steel structure factory building is a comprehensive topic. To deal with this problem, it is necessary to find out the primary factors affecting the temperature rise of steel structure factory building, focusing on one-sided problems, and then select appropriate methods to deal with relatively unnecessary factors in order to offset them. Excellent indoor environment, the highest cost-effective.
I. Thermal Insulation and Cooling of Steel Structure Workshop
The insulation film of steel workshop can insulate most of the solar radiation and heat transfer, and reduce the indoor greenhouse effect. Then the temperature of the factory building is greatly lowered to improve the environment of the steel structure factory building.
At present, there are two commonly used methods to select: adding insulating cotton to the roof of steel structure factory building, glass cotton is commonly used on the roof, the commonly used thickness is 50 m m, 75 mm, 100 mm, density is 10 kg/m, good equipment can generally reduce the indoor temperature by 5-8 C, the construction process is more chaotic, if the old factory building to do insulation transformation, demand Remove the original roof, pull up the wire mesh, lay glass wool on the wire mesh, cover the original roof panel with steel structure, and then do waterproof treatment. Spray high efficient heat insulation and reflective coatings on roof panels. This product has excellent heat insulation and insulation function. Steel structure can be coated on metal, concrete, lime wall, wood structure surface, asbestos tile, plastic, FRP, rubber and other surfaces. The coating is 0.25mm thick, and its effect is equal to that of glass wool of 10cm-15cm. It can reflect 99.5% infrared ray, 92.5% visible light, the highest sound insulation effect is 68%, and the uniform sound insulation effect of steel structure workshop is more than 50%. Fire-proof class A, completely non-flammable. Non-toxic, safe, long-lasting, service life of more than 15 years (specific introduction can refer to engineering materials file). If this method is used, the construction is convenient, the original roof is not damaged, and the aging of the roof can be prevented. After construction and before construction, the maximum temperature difference on the surface of the plate can reach 20 C, the indoor temperature difference can reach 8-10 C, and the energy consumption of the steel structure workshop can be reduced by 30-70%.
II. Ventilation and Cooling of Steel Structure Workshop
Because some machines in the steel structure workshop produce heat and water vapor, if these heat and water vapor are not discharged in time, they will accumulate in the workshop, and then make the temperature rise of the steel structure workshop affect the environment of the steel structure workshop. The way to deal with these problems is to ensure the fair ventilation of the workshop and the appropriate ventilation system with appropriate equipment. Fair exhaust system equipment will obviously improve the air environment of steel structure workshop, and greatly reduce the temperature of steel structure workshop. Equipment roof powerless ventilator is a kind of ventilation equipment which relies on the principle of air convection. When the air environment in the room surface is different, air activities will occur, and then clean the exhaust and hot air in the room. Its benefit is that it does not need additional electricity and is more environmentally friendly. But it has strong dependence on the environment and can not be forced to exhaust air. The main products are turbine ventilator, strip ventilator (daylighting belt ventilation), roof ventilator, etc. Power fan of forced exhaust fan on roof of steel plant equipment is a kind of ventilation equipment driven by electric power. Its exhaust effect is good, and it can get used to ventilation in any environment.
III. Forced cooling of steel structure workshop
Forced cooling refers to the cooling fan on the roof of a factory building. The cooling fan is a machine that uses the principle of water cooling to cool the air and conveys the cooling air to the room by a strong exhaust fan. It can keep the indoor temperature of steel structure factory buildings at 26-30 C quiet. Its power consumption is equal to 1/8 of air conditioning. The cost is 1/2 of the air conditioning, and it is a good method for mandatory cooling of factory buildings.