暖通空调
暖通空調
난통공조
HEATING,VENTILATING & AIR CONDITIONING
2014年
5期
114-118
,共5页
土壤热物性参数%热响应测试%线热源模型%柱热源模型%一维数值模型%二参数估算%三参数估算
土壤熱物性參數%熱響應測試%線熱源模型%柱熱源模型%一維數值模型%二參數估算%三參數估算
토양열물성삼수%열향응측시%선열원모형%주열원모형%일유수치모형%이삼수고산%삼삼수고산
soil thermal physical parameter%thermal response test%linear heat source model%cylindrical heat source model%one-dimensional numerical model%two parameter estimation%three parameter estimation
根据实测地埋管换热器进出水温度和流量，分别用线热源解析模型、柱热源解析模型和一维数值模型估算土壤的导热系数、孔内热阻和单位体积热容。介绍了二三参数估算法，三参数估算法可同时估算导热系数、孔内热阻和单位体积热容，但计算时间太长，对计算机的内存要求也较高；二参数估算法对导热系数和孔内热阻进行寻优搜索，单位体积热容利用关联式计算，结果合理，计算时间较短。基于二参数估算法结果显示，一维数值模型的结果更接近实际值。
根據實測地埋管換熱器進齣水溫度和流量，分彆用線熱源解析模型、柱熱源解析模型和一維數值模型估算土壤的導熱繫數、孔內熱阻和單位體積熱容。介紹瞭二三參數估算法，三參數估算法可同時估算導熱繫數、孔內熱阻和單位體積熱容，但計算時間太長，對計算機的內存要求也較高；二參數估算法對導熱繫數和孔內熱阻進行尋優搜索，單位體積熱容利用關聯式計算，結果閤理，計算時間較短。基于二參數估算法結果顯示，一維數值模型的結果更接近實際值。
근거실측지매관환열기진출수온도화류량，분별용선열원해석모형、주열원해석모형화일유수치모형고산토양적도열계수、공내열조화단위체적열용。개소료이삼삼수고산법，삼삼수고산법가동시고산도열계수、공내열조화단위체적열용，단계산시간태장，대계산궤적내존요구야교고；이삼수고산법대도열계수화공내열조진행심우수색，단위체적열용이용관련식계산，결과합리，계산시간교단。기우이삼수고산법결과현시，일유수치모형적결과경접근실제치。
According to the measured inlet and outlet water temperature and flow rates,estimates the thermal conductivity of soil,thermal resistance in hole and heat capacity per unit volume using linear and cylindrical heat source analytical models and one-dimensional numerical model respectively.Presents two and three-parameter estimation methods.Three-parameter estimation method can estimate the thermal conductivity,thermal resistance in hole and heat capacity per unit volume at the same time,but the calculation time is too long,and the requirement of the computer memory is higher.Two-parameter estimation method can obtain reasonable results through searching thermal conductivity and thermal resistance in hole,the heat capacity per unit volume can be obtained by using the correlative equation,and the calculation time is less.The results based on the two parameter estimation method show that the result using one-dimensional numerical model is closer to the actual value.
