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Heat Transfer and Thermodynamic Analyses of a Novel Solid-Gas Thermochemical Strontium Chloride-Ammonia Thermal Energy Storage System

[+] Author and Article Information
Maan Al-Zareer

Clean Energy Research Laboratory, Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
maan.al-zareer@uoit.ca

Ibrahim Dincer

Clean Energy Research Laboratory, Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
ibrahim.dincer@uoit.ca

Marc A. Rosen

Clean Energy Research Laboratory, Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada
marc.rosen@uoit.ca

1Corresponding author.

ASME doi:10.1115/1.4037534 History: Received July 26, 2016; Revised June 15, 2017

Abstract

A novel solid-gas thermochemical sorption thermal energy storage system for solar heating and cooling applications operating on four steady state flow devices and with two transient storage tanks is proposed. The thermal energy storage system stores solar or waste thermal energy in the form of chemical bonds as the solid-gas couple desorbs the working gas. Strontium chloride-ammonia is the working solid-gas couple, it has a moderate working temperature range that is appropriate for building heating and cooling. The steady state devices in the system are simulated using Aspen Plus and for the two transient components are simulated using Engineering Equations Solver. Multiple cases are examined of different heat and cold production temperatures for a constant thermal energy input temperature. Energy and exergy analyses are performed on the system. The maximum energy and exergy efficiencies for heating applications are 65.4% and 50.8% respectively, at a temperature of 87 oC. The maximum energy and exergy efficiencies for cooling applications are 29.3% at a temperature of 0 oC and 22.9% when it is -35 oC, respectively. The maximum heat produced is 2,010 kJ/kg at production temperature of 87 oC, and the maximum cold energy generated is 902 kJ/kg at a temperature of 0 oC. Finally, the system is modified to operate as a heat pump and energy and exergy analyses are performed on the thermochemical heat pump.

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