Energy consumption analysis on a dedicated outdoor air system with rotary desiccant wheel

Weiwei Liu; Zhiwei Lian; Reinhard Radermacher; Ye Yao

doi:10.1016/j.energy.2006.11.012

Energy consumption analysis on a dedicated outdoor air system with rotary desiccant wheel

Energy (Oxf). 2007 Sep;32(9):1749-1760. doi: 10.1016/j.energy.2006.11.012. Epub 2007 Jan 11.

Authors

Weiwei Liu¹, Zhiwei Lian¹, Reinhard Radermacher², Ye Yao¹

Affiliations

¹ Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, 800 Road Dongchuan, Shanghai 200240, China.
² Department of Mechanical Engineering, University of Maryland, College Park, MD 20742-3035, USA.

Abstract

A dedicated outdoor air system (DOAS) with rotary desiccant wheel is the combination of a desiccant dehumidification system and a vapor compression refrigeration system. An energy consumption model of this hybrid DOAS is established for its analysis. Coefficient of performance, COP, is appropriately defined for evaluation on performance of the hybrid DOAS. The results indicate that, compared with a conventional DOAS, energy savings are possible for the suggested DOAS, when solar energy or natural gas is used for regeneration. Ventilation air flow rate, temperature or humidity of outdoor air, as well as regeneration-to-process air ratio, influence the energy consumption and the COP of the hybrid DOAS, greatly.

Keywords: Dedicated outdoor air system; Energy consumption; Hydrid; Rotary desiccant wheel.