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Title: Simulation of hydration/dehydration of CaO/Ca(OH){sub 2} chemical heat pump reactor for cold/hot heat generation

Abstract

A chemical heat pump (CHP) utilizes reversible reactions involving significant endothermic and exothermic heats of reaction in order to develop a heat pump effect by storing and releasing energy while transforming it from chemical to thermal energy and vice versa. In this paper, the authors present a mathematical model and its numerical solution for the heat and mass transport phenomena occurring in the reactant particle bed of the CHP for heat storage and cold/hot heat generation based on the CaO/Ca(OH){sub 2} reversible hydration/dehydration reaction. Transient conservation equations of mass and energy transport including chemical kinetics are solved numerically subject to appropriate boundary and initial conditions to examine the influence of the mass transfer resistance on the overall performance of this CHP configuration. These results are presented and discussed with the aim of enhancing the CHP performance in the next generation reactor designs. The CHP can store thermal energy in industrial waste heat, solar heat, terrestrial heat, etc. in the form of chemical energy, and release it at various temperature levels during the heat-demand period.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Kyushu Inst. of Tech., Kitakyushu (JP)
OSTI Identifier:
20006238
Alternate Identifier(s):
OSTI ID: 20006238
Resource Type:
Journal Article
Journal Name:
Drying Technology
Additional Journal Information:
Journal Volume: 17; Journal Issue: 7-8; Conference: 11th International Drying Symposium (IDS'98), Halkidiki (GR), 08/19/1998--08/22/1998; Other Information: PBD: Aug-Sep 1999; Journal ID: ISSN 0737-3937
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; CHEMICAL HEAT PUMPS; MATHEMATICAL MODELS; HEAT TRANSFER; MASS TRANSFER; CALCIUM OXIDES; CALCIUM HYDROXIDES; HYDRATION; DEHYDRATION; CHEMICAL REACTION KINETICS; PERFORMANCE

Citation Formats

Ogura, Hironao, Shimojyo, Rui, Kage, Hiroyuki, Matsuno, Yoshizo, and Mujumdar, A.S. Simulation of hydration/dehydration of CaO/Ca(OH){sub 2} chemical heat pump reactor for cold/hot heat generation. United States: N. p., 1999. Web. doi:10.1080/07373939908917637.
Ogura, Hironao, Shimojyo, Rui, Kage, Hiroyuki, Matsuno, Yoshizo, & Mujumdar, A.S. Simulation of hydration/dehydration of CaO/Ca(OH){sub 2} chemical heat pump reactor for cold/hot heat generation. United States. doi:10.1080/07373939908917637.
Ogura, Hironao, Shimojyo, Rui, Kage, Hiroyuki, Matsuno, Yoshizo, and Mujumdar, A.S. Wed . "Simulation of hydration/dehydration of CaO/Ca(OH){sub 2} chemical heat pump reactor for cold/hot heat generation". United States. doi:10.1080/07373939908917637.
@article{osti_20006238,
title = {Simulation of hydration/dehydration of CaO/Ca(OH){sub 2} chemical heat pump reactor for cold/hot heat generation},
author = {Ogura, Hironao and Shimojyo, Rui and Kage, Hiroyuki and Matsuno, Yoshizo and Mujumdar, A.S.},
abstractNote = {A chemical heat pump (CHP) utilizes reversible reactions involving significant endothermic and exothermic heats of reaction in order to develop a heat pump effect by storing and releasing energy while transforming it from chemical to thermal energy and vice versa. In this paper, the authors present a mathematical model and its numerical solution for the heat and mass transport phenomena occurring in the reactant particle bed of the CHP for heat storage and cold/hot heat generation based on the CaO/Ca(OH){sub 2} reversible hydration/dehydration reaction. Transient conservation equations of mass and energy transport including chemical kinetics are solved numerically subject to appropriate boundary and initial conditions to examine the influence of the mass transfer resistance on the overall performance of this CHP configuration. These results are presented and discussed with the aim of enhancing the CHP performance in the next generation reactor designs. The CHP can store thermal energy in industrial waste heat, solar heat, terrestrial heat, etc. in the form of chemical energy, and release it at various temperature levels during the heat-demand period.},
doi = {10.1080/07373939908917637},
journal = {Drying Technology},
issn = {0737-3937},
number = 7-8,
volume = 17,
place = {United States},
year = {1999},
month = {9}
}