Temperature efficiency of heat exchangers in air handling units
Abstract
: In order to reduce ventilation heat loss and improve energy efficiency of low-energy buildings air-handling units (AHUs) with heat recovery are used. The article presents results of surveys performed in a passive building located in Katowice concerning the temperature efficiency of heat and cold recovery of two selected AHUs, with different heat exchangers. For this purpose the measurement data from the Building Management System (BMS) for the period 1.08.2015-31.07.2016 were used. The first unit was equipped with a rotary heat exchanger. Its average annual temperature efficiency of heat recovery was 47.2% annually. The efficiency of cold recovery amounted 52.9% on average for the warm half year. The second unit had a cross-flow exchanger. The average annual temperature efficiency of heat recovery in this device was 80.1%. The efficiency of cold recovery amounted 57.2% on average for the warm half year. Additional remarks concerning the temperature measurement in analysed units were also given.
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Author Biographies
Piotr Michalak received Ph.D degree in Energy Machines and Equipment from AGH, Kraków. Since 2009 he has been a researcher in the Department of Power Systems and Environmental Protection Facilities at the AGH, where currently he works. His scientific interests focus on problems concerning energy modelling and thermal dynamics of buildings, utilisation of renewable energy sources, CFD simulations and thermal and flow measurements. He is the author or co-author of 58 scientific papers in international and national journals.
Stanisław Grygierczyk received Ph.D. degree from University of Silesia in Katowice. Since 2008, the scientific and environmental coordinator at the Euro-Centrum Science and Technology Park in Katowice, where the first office and service building in Poland in the passive standard was built. He specializes in issues related to increasing energy efficiency, especially in buildings, the use of energy from renewable sources, technologies for improving the energy efficiency of buildings, low-energy and passive buildings, prosumer energy based on renewable and distributed energy sources, formal, legal and economic aspects of renewable energy development. He also participated in the implementation of several scientific and research projects related to improving energy efficiency and increasing the use of renewable energy in buildings.
Copyright (c) 2019 Piotr Michalak, Stanisław Grygierczyk
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