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Gooje, V. K. Analyzing the shift in comfort zone due to stratified and unstratified distribution of radiation. In: CONFERENCE ON PASSIVE AND LOW ENERGY ARCHITECTURE, 20., 2003, Santiago do Chile. Anais... Santiago do Chile, 2003.
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Abstract

For the sake of economy of computer runtime, most detailed hourly or sub-hourly energy analysis programs assume one temperature node per surface and per air mass. This results in calculations, in which each surface is assumed to be of uniform temperature, and each thermal zone is assumed to be of uniform temperature, i.e., no stratification. Under real world conditions, many surfaces may have non-uniform temperatures and many zones may experience some degree of stratification. This research is focused on the comparability and acceptability of the differences that would arise from assuming non-uniform condition or uniform condition by using a simulation tool. Thermal modeling tool Radtherm™ is used to analyze the behavior of the comfort variables. Radtherm™ is capable of producing both stratified and unstratified matrix of surface temperatures. A surface could be modeled as one element with uniform temperature or divided into multiple elements with different temperatures. An actual data set from an Adobe house at Carefree, Arizona is used in corroborating the simulation output. The house has radiant cooling and heating system, which is used predominantly in summers and winters. However, data acquired during spring thermal sailing season (system is off) from Carefree is used for assessment.
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