Abstract
Several studies have highlighted Combine Heat and Power (CHP) systems to be one of the proven and reliable technologies that can improve the efficiency of heat and electricity generation. The extensive adoption of this type of technology is crucial in reducing building emissions globally and in the U.K. This work uses a dynamic simulation software to evaluate the effect of CHP on the energy performance of an existing U.K. hotel and subsequently an approach to aid in the selection of optimum CHP size. The outcome of the study indicated that CHP systems in hotel buildings can provide considerable economic and environmental benefits with either maximally-sized CHP founded on the building’s base heat demand or with reduced CHP size of more than 50% smaller than the estimated maximum size. The optimum size design can be obtained through evaluation of the relationship between the main performance parameters and their variation with CHP sizes.
Highlights
Energy consumption and efficiency are important energy performance indicators in buildings for several stakeholders due to the continuous increase in global energy cost, depletion of available conventional energy resources and the adverse impact of global climate change and greenhouse gas emissions [1]
The Combine Heat and Power (CHP) system has been highlighted by numerous studies to be one of the proven and reliable technologies that can improve the efficiency of heat and electricity generation
The extensive adoption of this type of technology is crucial in reducing building emissions in the U.K. [4], especially since recent records indicate that building emissions in the U.K. have increased in the last two years, with the trend only moderately linked to lower winter temperatures than in 2014 [5]
Summary
Energy consumption and efficiency are important energy performance indicators in buildings for several stakeholders (such as energy end-users, researchers and governments) due to the continuous increase in global energy cost, depletion of available conventional energy resources and the adverse impact of global climate change and greenhouse gas emissions [1]. Compared to the other main greenhouse gas-emitting sectors, the building sector has the biggest potential of substantially reducing emissions with relatively less costly investments, especially since proven technologies that can reduce energy consumption and improve energy efficiency in both new and existing buildings are already commercially available [2]. The CHP system has been highlighted by numerous studies to be one of the proven and reliable technologies that can improve the efficiency of heat and electricity generation. This paper makes a contribution to existing knowledge as it presents a practical approach of assessing the optimum CHP size by critical analysis of a range of sizes; especially for large hotel buildings that tend to have considerably more heating demand compared to their electricity requirement. The CHP is sized based on the results of peak heating design day from the thermal analysis simulation
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