翅片管換熱器的距離與片高主要是影響著翅化比，翅化比和管內外介質的膜傳熱系數有很大的聯系。假如管內外膜傳熱系數差異較大，應挑選翅化比比較大的翅片管。當一側介質存在相變的情況下，傳熱系數的差異會較大。翅片的片距主要是考慮積灰，結塵，清洗等因素，同時需嚴格符合設備對壓力降等要求。擺放時，管與管之間的距離不易過大，一般＞1mm以上適合布管就行。在換熱的過程中，空氣在流經翅片管換熱器時，主要是翅片正反二個面參與換熱。二支翅片管中心部位只要少量的輻射傳熱，換熱作用不好。在空氣加熱的過程中，未經換熱的冷空氣會與從翅片中心穿過的已加熱熱空氣構成中和，反而影響了換熱的作用。

The distance and height of fin and tube heat exchanger mainly affect the fin ratio, which is closely related to the film heat transfer coefficient of the medium inside and outside the tube. If there is a big difference in the heat transfer coefficient between the inner and outer film of the tube, the finned tube with larger fin ratio should be selected. When one side of the medium has phase change, the difference of heat transfer coefficient will be larger. The fin spacing mainly considers the factors such as dust deposition, dust deposition and cleaning, and strictly meets the requirements of equipment for pressure drop. When placing, the distance between pipes is not easy to be too large, generally more than 1 mm is suitable for pipe laying. In the process of heat transfer, when the air flows through the finned tube heat exchanger, the positive and negative surfaces of the fins participate in the heat transfer. Only a small amount of radiation heat transfer is needed in the center of two finned tubes, so the heat transfer effect is not good. In the process of air heating, the cold air without heat exchange will be neutralized with the heated air passing through the center of fin, which will affect the heat transfer effect.

翅片管換熱器的管擺放應盡量按正三角形穿插擺放。通過一排時的熱風，在第二排遭受阻力，有回彈風，這樣整個翅片管360°換熱就不存在死角的現象。所以，不要等腰三角形擺放，盡量不使用正方形擺放。

The tubes of finned tube heat exchanger should be placed alternately according to regular triangle as far as possible. When the second row of fins is not subjected to rebound, there is a phenomenon of no heat transfer in the second row of fins. Therefore, do not place isosceles triangle, try not to use square.

空氣側的壓降在規劃中是個很重要的參數，這和翅片管的擺放有很大的聯系，翅片管擺放規劃時應核算窄隙流轉面與迎風面的比值，從而依據迎面風速核算出空氣質量流速，在關于不同溫度空氣的動力黏度，求出摩擦系數。

The pressure drop on the air side is a very important parameter in the planning, which is closely related to the placement of finned tubes. When planning the placement of finned tubes, the ratio of narrow gap flow surface to windward surface should be calculated, so as to calculate the air mass velocity according to the frontal wind speed, and calculate the friction coefficient with respect to the dynamic viscosity of air at different temperatures.