Effectiveness of indirect evaporative cooling and thermal mass in a hot arid climate

Abstract In this paper, we compare results of a long-term temperature monitoring in a building with high thermal mass to indoor temperature predictions of a second building that uses an indirect evaporative cooling system as a means of passive cooling ( Vivienda Bioclimatica Prototipo -VBP-1 ), for the climatic conditions of Sde Boqer, Negev region of Israel (local latitude 30°52′N, longitude 34°46′E, approximately 480 m above sea level). The high-mass building was monitored from January through September 2006 and belongs to a student dormitory complex located at the Sde Boqer Campus of Ben-Gurion University. VBP-1 was designed and built in Maracaibo, Venezuela (latitude 10°34′N, longitude 71°44′W, elevation 66 m above sea level) and had its indoor air temperatures, below and above a shaded roof pond, as well as the pond temperature monitored from February to September 2006. Formulas were developed for the VBP-1, based on part of the whole monitoring period, which represent the measured daily indoor maximum, average and minimum temperatures. The formulas were then validated against measurements taken independently in different time periods. The developed formulas were here used for estimating the building's thermal and energy performance at the climate of Sde Boqer, allowing a comparison of two different strategies: indirect evaporative cooling and the use of thermal mass.

[1]  Otto H. Koenigsberger,et al.  Manual Of Tropical Housing And Building , 1974 .

[2]  Baruch Givoni,et al.  Comfort, climate analysis and building design guidelines , 1992 .

[3]  D. Pearlmutter,et al.  Performance analysis of a simple roof cooling system with irrigated soil and two shading alternatives , 2008 .

[4]  Isaac A. Meir,et al.  Refining the use of evaporation in an experimental down-draft cool tower , 1996 .

[5]  Isaac A. Meir,et al.  Assessing the climatic implications of lightweight housing in a peripheral arid region , 1995 .

[6]  Eduardo L. Krüger,et al.  Predicting thermal performance in occupied dwellings , 2004 .

[7]  Evyatar Erell,et al.  A multi-stage down-draft evaporative cool tower for semi-enclosed spaces: Experiments with a water spraying system , 2008 .

[8]  Isaac A. Meir,et al.  Adaptive architecture: integrating low-energy technologies for climate control in the desert , 1997 .

[9]  Evyatar Erell,et al.  Monitoring the Thermal Performance of an Insulated Earth-sheltered Structure: A Hot-arid Zone Case Study , 1993 .

[10]  Mattheos Santamouris,et al.  Advances in passive cooling , 2007 .

[11]  Michael A. Humphreys,et al.  ADAPTIVE THERMAL COMFORT AND SUSTAINABLE THERMAL STANDARDS FOR BUILDINGS , 2002 .

[12]  B. Givoni,et al.  Thermal monitoring and indoor temperature predictions in a passive solar building in an arid environment , 2008 .

[13]  B. Givoni.  Passive and Low Energy Cooling of Buildings , 1994 .

[14]  Gail Brager,et al.  Thermal comfort in naturally ventilated buildings: revisions to ASHRAE Standard 55 , 2002 .

[15]  Baruch Givoni,et al.  Effectiveness of mass and night ventilation in lowering the indoor daytime temperatures. Part I: 1993 experimental periods , 1998 .

[16]  Baruch Givoni,et al.  Climate considerations in building and urban design , 1998 .