Application of Micro CHP ORC Heat Recovery

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Application of Micro CHP ORC Heat Recovery ( application-micro-chp-orc-heat-recovery )

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Temperature [°C] Micro‐CHP ORC‐Based System Application to Residential User (1/3) The aim of this analysis is to: (i)evaluate the fraction of electric and thermal demand met by the ORC system; (ii)analyze the influence on ORC system performance of this type of hot reservoir, in order to assess a yearly‐averaged ORC electric efficiency. Space heating 8.369 100 % 0 single residential building with floor area of approximately 100 m2 ; The hot water available from the solar collectors (assumed to have an effective area of 10 m2) is Domestic hot water 1.067 0.326 100 % 100 % 100 % 100 % Electricity for appliancesand lighting Electricity for air -conditioning 0.968 0 100 % Peak power demand [kW] Winter day Summer day Barbieri, E. S., Spina, P. R., Venturini, M., 2012, “Analysis of Innovative Micro‐CHP Systems to Meet Household Energy Demands”, Applied Energy, 97, pp. 723‐733. entirely used to feed the micro‐CHP ORC system; In order to consider a solar thermal collector outlet temperature higher than 40 °C, the simulations performed in the following cover the time frame from 10 a.m. to 6 p.m. in winter and from 8 a.m. to 8 p.m. in summer. The mass flow rate of ORC working fluid (R245fa) and water within thermal solar collectors are assumed equal to: 100 80 60 40 20 0 Summer 0.00 4.00 8.00 12.00 16.00 20.00 24.00 Winter Time [hr] Soteris, A., Kalogiru, Papamarcou, C., 2000, “Modelling of a thermosyphon solar water heating system and simple model validation”, Renewable Energy, 2000(21), 471 – 493. Winter: mwf = 0.03 kg/s; msc = 0.05 kg/s; Summer: mwf = 0.06 kg/s; msc = 0.10 kg/s.

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