Energy conservation in buildings: cogeneration and cogeneration coupled with thermal energy storage
Energy-conservation opportunity in an institutional building is studied through cogeneration with double-effect absorption chiller. Both, technical and economical feasibility is evaluated and presented. The typical electrical energy and cooling-load demand profiles of the buildings concerned are determined. Payback period, internal rate-of-return (IRR), net present value (NPV) and net profit of the Institute is determined through cash-flow analysis. Then, cogeneration coupling with thermal energy storage (TES) is studied and its technical and economical feasibility is evaluated and compared with that of cogeneration. On-site cogeneration with a double-effect absorption chiller provides a potential of at least 13% peak-demand reduction and about a 16% savings in energy consumption. It provides IRR greater than 21% but the saving potential is limited by the low demand of co-generated chilled water within the community of the Institution. Cogeneration coupling with thermal energy storage offers a simple and economically more attractive approach for maximizing the utilization of co-generated chilled-water and shows 23% reduction in peak demand and a 21% savings in energy consumption. It provides a higher IRR, greater than 25%.
Year of publication: |
2004
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Authors: | Khan, K. H. ; Rasul, M. G. ; Khan, M. M. K. |
Published in: |
Applied Energy. - Elsevier, ISSN 0306-2619. - Vol. 77.2004, 1, p. 15-34
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Publisher: |
Elsevier |
Keywords: | Buildings energy Co-generation Thermal energy storage Energy savings |
Saved in:
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