Access Restriction

Author Eicker, U. ♦ Huber, M. ♦ Seeberger, P. ♦ Schumacher, J. ♦ Vorschulze, C.
Source CiteSeerX
Content type Text
File Format PDF
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science
Subject Keyword Office Building Climatisation ♦ Ambient Air ♦ Air Temperature ♦ Earth Heat Exchanger ♦ Total Internal Load ♦ Office Hour ♦ Heavy Thermal Mass ♦ Typical German Summer Condition ♦ Night Discharging ♦ Total Load ♦ Night Air Change ♦ Am-bient Air Temperature ♦ Night Ventilation ♦ Average Temperature ♦ Concrete Ceiling ♦ Internal Load ♦ Year Measurement ♦ Ventilated Building ♦ Free Convection Condi-tions ♦ Summer Performance ♦ Limited Fresh Air Volume Flow ♦ Excellent Performance
Abstract One of the first passive energy standard office buildings in Europe was extensively monitored to analyse the summer performance of highly insulated, well sun-shaded and mechanically ventilated buildings. During typical German summer conditions with less than 160 hours outside air temperatures above 25°C these buildings perform excellently during summer, even if the internal loads are rather high. If am-bient air temperatures are significantly higher like in summer 2003 with more than 3K higher average temperatures, nearly 10 % of all office hours are above 26°C. Detailed measurements showed that the night discharging of heavy thermal masses such as concrete ceilings was not very effective under free convection condi-tions, although night air changes were always above 5 h-1. Air temperature decreases due to night ventilation are limited to 2-3K. Three year measurements and simulation of the earth heat exchanger showed, that excellent performance is achieved with COP´s between 35 and 50. Due to the limited fresh air volume flow in such buildings, the earth heat exchanger only removes a fraction of the total loads, here about 18 % of the total internal loads. 1.
Educational Role Student ♦ Teacher
Age Range above 22 year
Educational Use Research
Education Level UG and PG ♦ Career/Technical Study
Publisher Date 2006-01-01