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Calculation of the primary energy consumption of a supply and exhaust ventilation system with heat recovery in comparison to a demand-based (moisture-controlled) exhaust ventilation

 
: Krus, Martin; Rösler, Doris; Holm, Andreas

Zhang, X. ; Tongji University, Shanghai; Tsinghua University, Beijing:
ISHVAC 2011, 7th International Symposium on Heating, Ventilating and Air Conditioning. Proceedings : November 6 - 9, 2011, Shanghai, China
Shanghai, 2011
ISBN: 978-962-85138-0-2
pp.787-792
International Symposium on Heating, Ventilating and Air Conditioning (ISHVAC) <7, 2011, Shanghai>
English
Conference Paper
Fraunhofer IBP ()

Abstract
A demand-based (moisture-controlled) exhaust ventilation system is assessed in comparison to a supply and exhaust ventilation system with heat recovery by means of computational investigations. By implementing the individual ventilation systems the energy demand, especially the primary energy consumption, as well as the effects on indoor climate and CO2 content are calculated and compared. The calculations are based on a model apartment with a 3-person household for 3 different climates in Germany (cold, medium and hot climate). Despite the high heat recovery coefficient of the supply and exhaust ventilation system an only slightly higher energy use occurred for the demand-based exhaust ventilation system. If regenerative energy sources such as wood are used, primary energy consumption of the demand-based axhaust ventilation system is even lower in comparison to the supply and exhaust ventilation system with heat recovery. With demand-based exhaust ventilation system the CO2 concentration remains permanently below 1200 ppm.

: http://publica.fraunhofer.de/documents/N-237836.html