Usually, the fin-to-tube heat exchanger pitch and fin height mainly affect the finning ratio, the finning ratio and the film heat transfer coefficient inside and outside the tube have a great relationship. If the inner and outer heat transfer coefficients are quite different, finned tubes with larger finning ratio should be selected, such as steam heating air.

When one side of the medium has phase transition, the difference of heat transfer coefficient will be large, such as the exchange of cold and hot air, when the hot air is below the dew point, finned tube heat exchanger can be used. In the case of heat transfer between air and air without phase change, or heat exchange between water and water, the bare tube is usually suitable. Of course, low finned tube can also be used, because at this time belongs to the weak coefficient of heat transfer, strengthening any side of the tube is a certain effect. However, the effect of excessive finning ratio is not obvious, the best contact area inside and outside the tube strengthened at the same time, can be used in threaded or grooved tube.

Fin pitch is mainly considered ash, dust, easy to clean and other factors, at the same time to strictly meet the requirements of equipment pressure drop. When arranging, the distance between the tube and the tube is not too large, and generally >1mm or above is suitable for pipe laying. In the process of heat transfer, air flow through finned tube heat exchanger, mainly fin positive and negative two surfaces participate in heat transfer. There is only a small amount of radiation heat transfer in the middle part of the two finned tubes, and the heat transfer effect is not obvious. This part has no fins, no resistance, and the air is easy to penetrate. In the process of air heating, the cold air without heat transfer will neutralize with the heated hot air passing through the fin, but the heat transfer effect will be reduced. Compared with foreign finned tube heat exchangers, the tube spacing is only 0.5mm larger than the fin outer diameter, which shows the importance of tube spacing when finned tube is arranged.

At the same time, friends in the decision to purchase and replace the new finned tube radiator, we must have a clear understanding of the heating system (including heating mode), indoor wall (thin wall, insulation wall, etc.), according to the specific situation "to the right medicine", choose and install the radiator suitable for living conditions.

1. first, valves on heating pipes must not be switched. When the heating system first moves, it usually needs to be debugged. Specifically to each household is to adjust the valve of each riser to the appropriate position, open the manual exhaust valve of each finned tube radiator, exhaust the air collected in the radiator, or open the exhaust valve of the air collector installed at the top of the system until each radiator is hot, the debugging is completed. Once the commissioning is completed, the valve should be fixed and can not be switched at will.

2. keep the radiator near the radiator as far as possible. Do not litter on radiator or radiator. Otherwise, it will affect the heat dissipation effect of radiator.

3. secondly, fin tube radiator can not be changed arbitrarily. The installation of radiator is arranged in a position conducive to indoor heating, can ensure that air convection and indoor temperature of the local relative average, once changed the location will cause the imbalance of indoor temperature. On the other hand, once the pipe, radiator is moved, it will be very easy to leak, causing unnecessary losses to the home.

4. Once again, water can not be discharged from the system at will. If hot water is absent in the pipeline, cold water should be added to keep the pipe network system under a certain pressure. The more hot water lost, the water temperature in the pipe network will drop rapidly, resulting in a decrease in indoor temperature. Friends with steel heating should pay attention to shut the valve in time when the heating stops. It is filled with water in the heating. This can prolong the service life. Conditional copper-aluminum composite finned tube radiator can also be maintained in full water.

Radiator installation is not difficult, owners in the decoration of new houses, as long as the owner grasps the method of decoration radiator installation, find a regular installation company, and pay attention to retain the relevant bills, in case of problems, after-sales service provided by the enterprise, you can harvest a comfortable, healthy home.

You are also welcome to visit the official website of Qingli to learn the latest knowledge of radiators, finned tube radiators and other products, to learn radiator installation methods, troubleshooting techniques, etc., in order to quickly solve product problems.