What are Heat Sinks?
Radiator is an important and basic component of hot water (or steam) heating system. Hot water is cooled in the radiator (or steam is condensed in the radiator) to supply heat to the room to achieve the purpose of heating. The metal consumption and cost of the radiator occupy a considerable proportion in the heating system. Therefore, the correct selection of the radiator involves the system's economic indicators and operating effects. [1]
- Thermal performance
- The higher the heat transfer coefficient of the same material radiator, the better its thermal performance. Can be used to increase the heat dissipation area of the outer wall (with wings (ribs)), increase the flow speed of the air around the radiator (such as a steel radiator with a cover), and strengthen the radiation intensity of the external surface of the radiator (such as the outer surface decorated with a radiation coefficient High coatings) and reducing the thermal resistance between the various parts of the radiator (such as the steel tube and string of steel string radiators) to improve the thermal performance of the radiator. [1]
- Radiators are divided into radiant radiators and
- When selecting a radiator, the following requirements should be met:
- (1) Good thermal performance
- (2) Pressure capacity meets requirements
- (3) The shape should be coordinated with the interior decoration, and its size should meet the building size and requirements
- (4) Easy to remove ash deposits. [1]
- Figure 1 below shows the layout of the radiator. The radiator can be mounted on the surface or concealed. It is easy to remove dust when it is surface mounted, and the layout is simple, which is good for heat dissipation. Civil, public buildings, or places with high requirements on room decoration can be concealed by adding decorative covers. In most cases, the heat dissipation of the radiator is reduced after the cover is added. The radiator of the staircase should be arranged on the ground floor and the lower floors as much as possible. But it cannot be placed between two outer doors. Radiators placed on the ground floor of stairwells where there is a danger of freezing should be kept away from external doors. [1]
- When the heat transfer coefficient k is known or found, the calculated area of the radiator can be obtained using the following formula:
- Where Acalculated area of radiator, m 2 ;
- Qheating design heat load, W;
- t m average temperature of heat medium of radiator, ;
- When the use conditions and test conditions are different, the heat transfer performance of the radiator changes, and different coefficients are used.