NDLI: Performance of Fuel Cell and Engine Based Cogeneration Systems in Heating and Cooling Applications

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Gregory, J. Kowalski Zenouzi, Mansour
Copyright Year	2004
Abstract	A generalized thermodynamic model is developed to describe cooling, heating and power generating systems. This model is based on reversible power generation and refrigeration devices with practical, irreversible heat exchanger processes provides valuable information on a system’s performance and allows easy comparisons among different systems at different loading conditions. Using both the first and second laws as well as the carbon dioxide production rate allows one to make a first order system assessment on its energy usage and environment impact. The use of the exergy destruction rate and insuring that its behavior be consistent with that of the first law performance is a important to insure that the thermodynamic system boundaries are correctly and completely defined. The importance of the total thermal load to required power ratio (HLRP) as a scaling parameter is demonstrated. While the reported results confirmed that generalized trends are not possible identify, a number of trends for limited conditions have been identified. The results have shown that a combined vapor compression/absorption refrigeration has higher first law utilization factors and lower carbon dioxide production rate for system with higher refrigeration to total thermal load ratios for all HLRP values. Fuel cell based subsystems outperform engine based subsystems for systems with large refrigeration loads.
Sponsorship	Advanced Energy Systems Division
Starting Page	163
Ending Page	176
Page Count	14
File Format	PDF
ISBN	0791847012
DOI	10.1115/IMECE2004-60319
Volume Number	Advanced Energy Systems
Conference Proceedings	ASME 2004 International Mechanical Engineering Congress and Exposition
Language	English
Publisher Date	2004-11-13
Publisher Place	Anaheim, California, USA
Access Restriction	Subscribed
Subject Keyword	Energy consumption Compression Cooling Carbon dioxide Vapors Heat exchangers Thermal systems Engines Stress Absorption Cogeneration systems Heating Fuel cells Energy generation Exergy Refrigeration Heating and cooling
Content Type	Text
Resource Type	Article

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