Modell und Programm CLIMT zur einfachen Ermittlung der Raumlufttemperatur und Raumluftfeuchte bei freier Klimatisierung

Model and program CLIMT for a simplified determination of room temperature and relative humidity under arbitrary climate conditions.

In planning practice there is a need for a comparably simple (cf. TRNSYS, ENERGY PLUS), reliable tool for quantifying an indoor climate. In this article a practicable model is put forward for determining the hourly values for natural conditioning of indoor air temperature, the perceived temperature (average of air and enclosing surface temperatures) and the interior air humidity in relation to the external climate (external air temperature, radiant heat and relative humidity of the outside air), the building parameters (geometry, heat transfer resistance of the shell structure, heat and moisture absorption properties of the components), the ventilation and the use of the space (interior heat sources, interior moisture sources and interior air-regulated heating). The results form the source text for the user-friendly Windows program CLIMT (CLimate-Indoor-Moisture-Temperature). The CLIMT model and program are validated in a test house by comparing values calculated using TRNSYS with measured values. The results agree very well. The CLIMT program is user-friendly and practically-oriented.