Energy Systems for Multigeneration Purposes

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Energy Systems for Multigeneration Purposes ( energy-systems-multigeneration-purposes )

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Chapter 3: Literature Review 3.1 Introduction In the literature, there have been various studies associated with CHP and trigeneration energy systems, though a comprehensive study of a multigeneration energy system has not yet appeared. Because of the environmental concerns and technological developments in the last decade, both the need for and the capability of producing multipurpose energy solutions have been amplified considerably. The related papers, their aims, method of analysis and brief conclusions are presented in this section. In this chapter, an attempt is made to cover the most recent studies regarding cogeneration of heat and power (CHP), trigeneration and multigeneration energy systems. Since there are several papers about CHP and trigeneration systems, the literature has been categorized based on thermodynamic modeling, exergy and exergoeconomic analysis and optimization study. This chapter begins with the details of the literature review and then provides a summary of recent publications. 3.1 Cogeneration heat and power (CHP) systems A multigeneration energy system produces several useful outputs from one or more kinds of energy inputs. The main purposes of using multigeneration are to increase efficiency and sustainability and to reduce environmental impact and cost. Such systems often provide significant potential for global warming mitigation. Possible products of a multigeneration system include electricity, heating, cooling, hot water, fresh water and hydrogen. Cogeneration, or combined heat and power (CHP), represents a relatively simple process that produces two commodities in an integrated fashion, including the use of waste heat from electricity generation to produce heating. The overall energy efficiency of a cogeneration system, defined as the part of the fuel energy content converted to both electricity and useful thermal energy, is typically 40- 50% and, in some cases, much higher [8]. A micro-scale building cooling, heating and power (BCHP) system with an adsorption chiller was experimentally studied by Huangfu et al. [15]. The authors observed the performance of an adsorption chiller under different heating conditions. They concluded that there was an almost linear relation between the adsorption chiller and the change in hot water inlet 36

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