Experimental investigation on the performance of an air-to-air energy recovery for building applications in hot-humid climate

M.F. Zafirah; A. Mardiana

doi:10.15282/jmes.10.1.2016.10.0178

Authors

M.F. Zafirah Energy, Indoor and Environmental Quality Research Group, School of Industrial Technology, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, MALAYSIA
A. Mardiana Energy, Indoor and Environmental Quality Research Group, School of Industrial Technology, Universiti Sains Malaysia, 11800 USM, Pulau Pinang, MALAYSIA

DOI:

https://doi.org/10.15282/jmes.10.1.2016.10.0178

Keywords:

Air-to-air energy recovery, performance, hot-humid climate, experimental investigation

Abstract

The aim of this study was to evaluate the performance of an air-to-air energy recovery system in terms of latent efficiency and recovered energy. Experimental investigations were carried out under controlled conditions in Energy and IEQ Testing Unit located in School of Industrial Technology, Universiti Sains Malaysia. Tests were performed under different airflow rates ranged from 1.0 to 3.0 m/s and intake relative humidity of 70 %, 80 % and 90 %. The latent efficiency and recovered energy of the system were calculated and evaluated by adopting calculation method by ASHRAE Standard. The latent efficiency of this system ranged from 40 to 74 % and the highest value of recovered energy of 1,456 W was achieved at 2.5 m/s and 90 %. Results indicate that the latent efficiency decreased and in contrast the recovered energy increased with increasing airflow rates.

References

Chua K, Chou S, Yang W, Yan J. Achieving better energy-efficient air conditioning–a review of technologies and strategies. Applied Energy. 2013;104:87-104.

Gong G, Zeng W, Wang L, Wu C. A new heat recovery technique for air- conditioning/heat-pump system. Applied Thermal Engineering. 2008;28:2360-70.

Zafirah M, Mardiana A. Design, efficiency and recovered energy of an air-to-air energy recovery system for building applications in hot-humid climate. International Journal of Scientific Research. 2014;3:1803-7.

Shao L, Riffat S. Flow loss caused by heat pipes in natural ventilation stacks. Applied thermal engineering. 1997;17:393-9.

Pavel S. Efficiency of heat recovery unit in D-building: Mikkeli University of Applied Sciences; 2010.

Fauchoux MT, Simonson CJ, Torvi DA. The effect of energy recovery on perceived air quality, energy consumption, and the economics of an office building. ASHRAE Transactions. 2007;113.

Masitah A, Ahmad MI, Yatim Y. Heat Transfer and effectiveness analysis of a cross-flow heat exchanger for potential energy recovery applications in hot-humid climate. Energy Research Journal. 2015;6:7.

Liu D, Zhao F-Y, Tang G-F. Active low-grade energy recovery potential for building energy conservation. Renewable and Sustainable Energy Reviews. 2010;14:2736-47.

Mardiana A, Riffat S. Review on physical and performance parameters of heat recovery systems for building applications. Renewable and Sustainable Energy Reviews. 2013;28:174-90.

Seyed-Ahmadi M, Erb B, Simonson CJ, Besant RW. Transient behavior of run- around heat and moisture exchanger system. Part І: Model formulation and verification. International Journal of Heat and Mass Transfer. 2009;52:6000-11.

Shao L, Riffat S, Gan G. Heat recovery with low pressure loss for natural veltilation. Energy and Buildings. 1998;28:179-84.

Lazzarin RM, Gasparella A. Technical and economical analysis of heat recovery in building ventilation systems. Applied Thermal Engineering. 1998;18:47-67.

Riffat S, Gan G. Determination of effectiveness of heat-pipe heat recovery for naturally-ventilated buildings. Applied Thermal Engineering. 1998;18:121-30.

in hot-humid climate

Lamb B. Plate heat exchangers—a low-cost route to heat recovery. Journal of Heat Recovery Systems. 1982;2:247-55.

Mardiana-Idayu A, Riffat S. Review on heat recovery technologies for building applications. Renewable and Sustainable Energy Reviews. 2012;16:1241-55.

Pandey S, Nema V. Investigation of the performance parameters of an experimental plate heat exchanger in single phase flow. International Journal of Energy Engineering. 2011;1:19-24.

Kragh J, Rose J, Nielsen TR, Svendsen S. New counter flow heat exchanger designed for ventilation systems in cold climates. Energy and Buildings. 2007;39:1151-8.

Zhou Y, Wu J, Wang R. Performance of energy recovery ventilator with various weathers and temperature set-points. Energy and Buildings. 2007;39:1202-10.

Delfani S, Pasdarshahri H, Karami M. Experimental investigation of heat recovery system for building air conditioning in hot and humid areas. Energy and Buildings. 2012;49:62-8.

Hughes BR, Chaudhry HN, Calautit JK. Passive energy recovery from natural ventilation air streams. Applied Energy. 2014;113:127-40.

Fan Y, Ito K. Energy consumption analysis intended for real office space with energy recovery ventilator by integrating BES and CFD approaches. Building and Environment. 2012;52:57-67.

Nasif M, Al-Waked R, Morrison G, Behnia M. Membrane heat exchanger in HVAC energy recovery systems, systems energy analysis. Energy and Buildings. 2010;42:1833-40.

Niu J, Zhang L. Membrane-based energy recovery ventilators: a solution to heat recovery for ventilation air in Hong Kong. HKIE Transactions. 2001;8:58-63.

Fisk WJ, Turiel I. Residential air-to-air heat exchangers: Performance energy savings, and economics. Energy and Buildings. 1983;5:197-211.

Mardiana-Idayu A, Riffat SB. An experimental study on the performance of enthalpy recovery system for building applications. Energy and Buildings. 2011;43:2533-8.

Zhou C. Estimation of volumetric flow rate in a square duct: Equal area versus log-Tchebycheff methods: University of Windsor; 2005.

Zhang L-Z, Wang Y-Y, Wang C-L, Xiang H. Synthesis and characterization of a PVA/LiCl blend membrane for air dehumidification. Journal of Membrane Science. 2008;308:198-206.

Min J, Su M. Performance analysis of a membrane-based enthalpy exchanger: effects of the membrane properties on the exchanger performance. Journal of Membrane Science. 2010;348:376-82.

Zhong K, Kang Y. Applicability of air-to-air heat recovery ventilators in China. Applied Thermal Engineering. 2009;29:830-40.

Zhang L, Niu J. Energy requirements for conditioning fresh air and the long-term savings with a membrane-based energy recovery ventilator in Hong Kong. Energy. 2001;26:119-35.