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农村老式柴灶的热效率不到10％,而节柴灶却高达25％以上。为什么节柴灶能提高热效率呢?主要原因是:①节柴灶灶门较小,一般高为20厘米,宽为18厘米左右,并配有挡风板,添柴后随手关门烧火,控制了冷空气从灶门进入灶膛和膛内火苗外窜,热量损失少,有利于提高灶膛的温度。②节柴灶灶膛适当缩小,锅底受热面积大,火高适宜(一般为14～16厘米),热量集中,加上灶内设有拦火圈,可
The thermal efficiency of rural old stoves is less than 10%, but the stove is as high as 25%. Why firewood stove to improve thermal efficiency? The main reasons are: ① firewood stove door smaller, generally 20 centimeters high, about 18 centimeters wide and equipped with a windshield, add firewood readily closed fire, control Cold air from the stove door into the hearth and muzzle outside the channeling, less heat loss, is conducive to raising the temperature of the hearth. (2) the stove stove suitable reduction of the chest, the bottom of the heated area of the pan, high fire appropriate (usually 14 to 16 cm), heat concentration, together with the stove with a bar ring can be