HYDRAULICS, PERFORMANCE AND COMFORT OF GROUND COUPLED HEATING-COOLING SYSTEMS
The energy demand for heating is decreasing signifi-cantly in modern highly-insulated dwellings. Due to larger glass areas and well insulated buildings overheating becomes a problem. In a research project several hydraulic schemes with ground-coupled heat pumps and passive cooling with borehole heat exchanger have been evaluated. A parametric study with MATLAB/Simulink simula-tions using a residential low-energy building with floor heating system has been carried out. Simultane-ous simulation of building and mechanical system showed dynamic interaction of floor and ground heat exchanger. Main objective is to estimate energy de-mand for heating and cooling, thermal comfort and economical feasibility of the overall system. A big challenge is appropriate control providing an optimal thermal comfort with a minimum of addi-tional energy compared to heating only systems. Especially the meteorological conditions in spring and autumn cause intermittent heating and cooling which increases heating energy demand, since the concrete structure is alternately heated and cooled.
simultaneous simulation heating and cooling ground coupled heat pump borehole heat exchanger hydraulics
Ralf Dott Carsten Wemh(o)ner Thomas Afjei
Institute of Energy in Building, University of Applied Sciences Northwestern Switzerland 4132 Muttenz, Switzerland,
国际会议
北京
英文
2007-09-03（万方平台首次上网日期，不代表论文的发表时间）