Design Optimization of Heat Wheels for Energy Recovery in HVAC Systems

Energies

Stefano De Antonellis¹  Manuel Intini¹  Cesare Maria Joppolo¹  Calogero Leone² 

[1] Department of Energy, Politecnico di Milano, Via Lambruschini 4, Milano 20156, Italy; E-Mails:;Recuperator S.p.A., Via Valfurva 13, Rescaldina (MI) 20027, Italy; E-Mail:

关键词: heat wheel optimization;    heat wheel effectiveness;    simulation;    experimental data;    heat exchanger design;   

DOI  :  10.3390/en7117348

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.