Abstract
Nowadays, people still rely on traditional heating methods in rural areas of northern China, such as Kang (bed-stoves) and burning caves in cold winter. Field measurements of indoor environment were carried out in several rural houses with burning-cave-coil-Kang coupling heating system in northern China. The results show that this system is able to realize the graded use of internal energy of burning cave. The temperature of supply pipe water ranged from 30 ℃ to 50 ℃ which met the demands in 74.7% of time. The surface temperature of Kang maintained at above 25 ℃. Compared with traditional burning cave, using burning-cave-coil-Kang coupled with heating system has a higher thermal efficiency of 48.9%, which is 8.32% higher than the traditional one.
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