Paper Conference

Proceedings of eSim 2014: 8th Conference of IBPSA-Canada


TRNSYS Modelling of a Hybrid Membrane Liquid Desiccant Air Conditioning System

Ahmed Abdel-Salama, Gaoming Geb, Carey Simonsonc

Abstract: The attention to liquid desiccant air conditioning (LDAC) systems is increasing worldwide. This is mainly due to the ability of these systems to efficiently maintain indoor air humidity within acceptable ranges in energy efficient way compared to conventional air conditioning systems. LDAC systems still under R&D in order to reduce/eliminate common drawbacks, such as the carryover of desiccant droplets in air streams, and to develop novel configurations which aim to achieve higher energy efficiency. To address these, two improvements are implemented on a LDAC system in this study. First, liquid-to-air membrane energy exchangers (LAMEEs) are used as the dehumidifier and regenerator, in order to avoid the carryover of desiccant droplets in air streams. Second, the desiccant solution heating and cooling energy requirements are simultaneously provided using a hybrid liquid desiccant heat pump (LDHP). The proposed hybrid membrane LDAC (H-M-LDAC) system is annually simulated using TRNSYS for a small office building located in Miami, FL. Results show that the COPs of the return air heat pump (RAHP), LDHP and H-M-LDAC system vary under different operating conditions with an approximate average annual values of 4.5, 7.8 and 1, respectively.
Pages: 901 - 916