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Research Article

Comparison study of a novel solid desiccant heat pump system with EnergyPlus

Yu Jiang, Tianshu Ge, Ruzhu Wang( )
Institute of Refrigeration and Cryogenics, Key Laboratory for Power Machinery and Engineering of M.O.E, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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Abstract

The variable refrigerant flow (VRF) air conditioning system usually needs to be operated with a ventilation system, since the VRF system cannot provide fresh air. The commonly used ventilation unit with the VRF system is the heat recovery ventilation (HRV) unit due to its merits of energy saving. In this study, a novel solid desiccant heat pump unit (DESICA) is introduced and mathematical model of DESICA is developed based on the dynamic building energy simulation software—EnergyPlus. The mathematical model is validated with experimental results. Based on the model, performance comparison study is conducted among the novel joint DESICA and VRF (DES&VRF) system, the conventional joint HRV and VRF (HRV&VRF) system, and the original VRF standalone with ventilation (VRFSA) system in an office building in Shanghai. Simulation results show that, HRV&VRF and VRFSA can handle the sensible load, though both of them cannot well deal with the latent load. On the contrary, DES&VRF system can keep both indoor temperature and humidity ratio at the target value, resulting in the best indoor thermal comfort than the other two systems. In addition, through the whole year, DES&VRF consumes 5% more energy than VRFSA and 20% less energy than HRV&VRF.

Keywords

performance comparisonsolid desiccant heat pumpVRFHRVenergy saving

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Building Simulation
Volume 7 Issue 5,
October 2014
Pages 467-476
DOI: 10.1007/s12273-014-0166-7
Cite this article:
Jiang Y, Ge T, Wang R. Comparison study of a novel solid desiccant heat pump system with EnergyPlus. Building Simulation, 2014, 7(5): 467-476. https://doi.org/10.1007/s12273-014-0166-7

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Received: 01 April 2013
Revised: 29 November 2013
Accepted: 02 December 2013
Published: 07 March 2014
© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2014
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