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IEA SHC Task 38 Monitoring Procedure Table 8: Output of the spreadsheet for the calculation of enthalpy differences (DH) Description of data output Label Difference between cooling energy delivered from DEC AHU and from conventional AHU with fixed supply temperature, m*DH AHU corr Difference of enthalpy (cooling energy) achieved from cooling coil in conventional AHU, m*DH AHU CC Difference of enthalpy (heating energy) achieved from heating coil in conventional AHU, m*DH postheat Difference of enthalpy between inlet (external) air and outlet (supply ) air of conventional AHU, m*DH AHU conv m*DH AHU DEC cooling m*DH AHU DEC heating ΔH corr ΔH conv_CC ΔH postheat ΔH conv_AHU ΔH AHU_cool ΔH AHU_heat These outputs are the special input on the monitoring procedure for DEC systems. On their basis the Primary Energy Ratio for conventional AHU (PER REF) can be calculated as follows: PER ref _ DEC = ∆H conv _ CC SPF ⋅ ε el ∆H ∆H + η boiler conv _ AHU postheat ⋅ ε fossil E + elec,conv _ AHU ε elec ⎡ kWh ⎢ ⎣kWh th elec ⎤ ⎥ ⎦ Eq. 61 The Primary Energy Saving factor f save is calculated as for all Solar Heating and Cooling systems with PER RES or PER fossil : PER f sav, shc = 1− PER ref RES / fossil Eq. 62 3.4 Summary of the output of the procedure The monitoring procedure supports the evaluation of the performance of the monitored system and its comparison with a conventional system. To this purposes, three level of data 29 99% draft Version
IEA SHC Task 38 Monitoring Procedure elaboration have been defined depending on the kind of monitored energy flows. The major output of each level is summarized in the following tables. Table 9 Summary of the output of the 1 st monitoring level SHDC PER_res PER_ref First monitoring level COPel, tot COPel, overall PER_fossil DEC PER_res with DEC postcooling, Tsupply fixed to: xx°C PER_ref with ref_AHU postheating, Tsupply fixed to: xx°C PER_ref_AHU postheating, Tsupply = measured in DEC PER_ref without ref_AHU postheating Description Ratio between load and the electrical consumption excluding distribution Ratio between load and the electrical consumption including distribution Primary energy ratio for the monitored system accounting for RES contribution Primary energy ratio for the monitored system accounting RES contribution as fossil Primary energy ratio for the conventional system set as reference for comparisons Table 10 Summary of the output of the 2 nd monitoring level Second monitoring level Description ηcoll,util ηstge ηsys ηheat_solrad Q_solunex Q_tot, heat Collectors efficiency Storage efficiency System efficiency (taking into account the heat losses in all the system) Solar heat management efficiency Solar energy unexploited Total heat load 30 99% draft Version
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IEA Solar Heating and Cooling Progr
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IEA Solar Heating and Cooling Progr
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Endbericht Solare Kühlung und Klim
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Task 38 Solar Air-Conditioning and
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IEA SHC Task 38 Solar Air Condition
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Pompe évaporateur + compteur C3 Dr
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80 70 Temperature (°C) 60 50 40 3
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Power (kW) 20 19 18 17 16 15 14 13
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Power (kW) 20 19 18 17 16 15 14 13
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Questionnaire for Owners of Small-S
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Grundprinzip Solare Wärme thermisc
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- Leistungsvergleich von verfügbar
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Liste der Systeme im Monitoring von
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IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

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