In the northern villages and towns of China,the heating energy consumption in winter is large,the energy utilization rate is low,and the problem of serious environmental pollution is increasingly prominent.For this reason,all regions are promoting clean energy heating.The use of renewable energy according to local conditions is 可 great significance for the heating in northern villages and towns.The geothermal cascade heating system is a clean heating choice,which is less popularized in villages and towns,and has certain regional selectivity.This paper analyzes the suitability and operation effect of geothermal cascade heating system in a typical area in the north-a village and town in Qinghe County.Through comparing the suitability 可 different heating system schemes,it is found that the initial investment of geothermal cascade heating system is high,but the operation cost is low,and the comprehensive energy efficiency of the system is high.After comprehensive evaluation of suitability,it is concluded that geothermal cascade heating system has advantages in northern villages and towns;The actual operation efect of geothermal cascade heating system is analyzed,and the actual operation cost of the system is 13.48 yuan/m2,the operation energy efficiency ratio is 4.49,and the system operates well;The indoor environment at the user's side is analyzed,and it is concluded that in the heating season,the indoor temperature of the user is higher than the design temperature,the indoor environmental quality meets the standard requirements,and the user satisfaction is high.This paper provides an important reference for the promotion of geothermal cascade heating system in northern villages and towns.
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