Design Optimization of Heat Wheels for Energy Recovery in HVAC Systems

Stefano De Antonellis, Manuel Intini, Cesare Maria Joppolo and Calogero Leone
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Stefano De Antonellis: Department of Energy, Politecnico di Milano, Via Lambruschini 4, Milano 20156, Italy
Manuel Intini: Department of Energy, Politecnico di Milano, Via Lambruschini 4, Milano 20156, Italy
Cesare Maria Joppolo: Department of Energy, Politecnico di Milano, Via Lambruschini 4, Milano 20156, Italy
Calogero Leone: Recuperator S.p.A., Via Valfurva 13, Rescaldina (MI) 20027, Italy

Energies, 2014, vol. 7, issue 11, 1-20

Abstract: Air to air heat exchangers play a crucial role in mechanical ventilation equipment, due to the potential primary energy savings both in case of refurbishment of existing buildings or in case of new ones. In particular, interest in heat wheels is increasing due to their low pressure drop and high effectiveness. In this paper a detailed optimization of design parameters of heat wheels is performed in order to maximize sensible effectiveness and to minimize pressure drop. The analysis is carried out through a one dimensional lumped parameters heat wheel model, which solves heat and mass transfer equations, and through appropriate correlations to estimate pressure drop. Simulation results have been compared with experimental data of a heat wheel tested in specific facilities, and good agreement is attained. The device optimization is performed through the variation of main design parameters, such as heat wheel length, channel base, height and thickness and for different operating conditions, namely the air face velocity and the revolution speed. It is shown that the best configurations are achieved with small channel thickness and, depending on the required sensible effectiveness, with appropriate values of wheel length and channel base and height.

Keywords: heat wheel optimization; heat wheel effectiveness; simulation; experimental data; heat exchanger design (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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