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Improving heat recovery using retrofitted heat pump in air handling unit with energy wheel
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0003-3194-1762
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0003-3896-2443
2014 (English)In: Applied Thermal Engineering, ISSN 1359-4311, E-ISSN 1873-5606, Vol. 62, no 2, p. 823-829Article in journal (Refereed) Published
Abstract [en]

The world is facing a challenge to reduce energy use to meet the environmental goals set for the future. One factor that has a great impact on the energy performance of buildings is the ventilation losses. To handle these losses, heat recovery systems with rotating heat exchanger are often implemented. These systems have been shown to recover about 60-70% of the energy in the exhaust air on an annual basis. After a heat recovery system is installed it is hard to improve the efficiency of the installed recovery system with an acceptable economic payback period. In the present paper one way to improve the energy performance of a building with this type of heat recovery system by the use of a heat pump is investigated by simulations in TrnSys. The heat pump system is arranged so that the evaporator is connected to a heat exchanger mounted in the exhaust airstream after the energy wheel, and the condenser of the heat pump is mounted so that the temperature of return water from the heating coil is increased. The simulations show that there is a possibility to increase the heat recovery rate of the air handling unit in a significant way by retrofitting a heat pump to the system.

Place, publisher, year, edition, pages
2014. Vol. 62, no 2, p. 823-829
Keywords [en]
Efficiency, Heat pump retrofit, Ventilation heat recovery, Air handling units, Energy performance, Energy performance of buildings, Heat pumps, Heat recovery systems, Payback periods, Recovery systems, Energy efficiency, Heat pump systems, Investments, Retrofitting, Waste heat, Waste heat utilization
National Category
Energy Engineering
Identifiers
URN: urn:nbn:se:kth:diva-139972DOI: 10.1016/j.applthermaleng.2013.09.059ISI: 000330910700058Scopus ID: 2-s2.0-84889835558OAI: oai:DiVA.org:kth-139972DiVA, id: diva2:689668
Note

QC 20140121

Available from: 2014-01-21 Created: 2014-01-16 Last updated: 2017-12-06Bibliographically approved
In thesis
1. Investigating Different Opportunities to Increase Energy Efficiency in Buildings by Retrofitting Heat Pump Coupled Heat Recovery Systems
Open this publication in new window or tab >>Investigating Different Opportunities to Increase Energy Efficiency in Buildings by Retrofitting Heat Pump Coupled Heat Recovery Systems
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2014. p. vii, 117
Series
TRITA-REFR, ISSN 1102-0245 ; 14:01
National Category
Energy Engineering
Research subject
Energy Technology
Identifiers
urn:nbn:se:kth:diva-148784 (URN)978-91-7595-214-7 (ISBN)
Public defence
2014-09-05, Kollegiesalen, Brinellvägen 8, KTH, Sockholm, 09:00 (English)
Opponent
Supervisors
Note

QC 20140825

Available from: 2014-08-25 Created: 2014-08-11 Last updated: 2014-08-25Bibliographically approved

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Wallin, JörgenClaesson, Joachim

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