IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

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IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report, Date:… 4.3 Annual / Monthly Data Monthly data of the solar cooling and heating system for the years 2008, 2009, and 2010 are given in the tables 1 to 3 below. By replacing some pumps with new high efficiency models in June 2009 the electrical COP in cooling mode has been increased significantly. Table 1: Monthly energy values for the measuring period 2008 2008 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Solar thermal system solar irradiation on collector 3182 6029 6404 6811 10009 8439 9660 8736 5980 4689 3094 1567 solar thermal gain 1167 2300 2110 2006 2804 2220 2831 2743 1968 1793 1060 749 Absorption chiller consumed heat 0 0 0 77 1419 1428 1874 1938 701 26 0 0 provided cold 0 0 0 44 972 949 1279 1378 490 11 0 0 Building cold demand 0 0 0 56 1897 4132 4035 3585 1134 95 0 0 heat demand 4763 3116 2456 958 0 0 0 0 1120 2277 3809 8ς Secondary energy Total Electricity Consumption 125 262 208 204 211 267 230 255 203 165 130 104 Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Table 2: Monthly energy values for the measuring period 2009 2009 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Solar thermal system solar irradiation on collector 2797 3034 4162 6776 9674 8683 9168 10074 7553 4475 3376 2097 solar thermal gain 938 919 1364 3143 2825 2195 2717 3421 1827 1367 1215 504 Absorption chiller consumed heat 0 0 0 61 731 981 1676 2225 540 53 0 0 provided cold 0 0 0 31 503 671 1221 1639 392 32 0 0 Building cold demand 0 0 0 133 1368 2198 3596 3781 965 176 0 0 heat demand 6046 4975 3209 426 116 30 0 0 8 2127 2742 ♦∗ϑ Secondary energy Total Electricity Consumption 88 102 155 125 155 129 175 227 83 111 130 62 Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Table 3: Monthly energy values for the measuring period 2010 2010 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Energy [kWh] Solar thermal system solar irradiation on collector 1671 3239 5385 8782 6266 8374 9683 7417 6980 4989 2808 solar thermal gain 255 1022 1731 2369 1253 2388 3227 2128 2126 1770 880 Absorption chiller consumed heat 0 0 0 140 0 1292 2061 1134 0 0 provided cold 0 0 0 92 0 956 1488 828 0 0 Building cold demand 6234 4135 2407 779 639 284 0 55 575 2320 3278 heat demand 0 0 0 215 751 2974 4661 2171 137 0 0 Secondary energy Total Electricity Consumption 42 91 112 141 165 194 216 139 82 139 101 Energy [kWh]
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report, Date:… 4.4 Analysis of the absorption chiller and the reject heat loop Figure 4 shows the capacity of the chiller and the heat rejection loop during the course of a typical summer day. The absorption chiller provides about 11 kW chilled water by means of 14.5 kW driving heat from 10 a.m. to 5 p.m. Until 9 p.m. chiller operation is continued with surplus driving heat from the buffer tank, gained during daytime. The chiller’s reject heat is primarily dissipated by the dry cooler. Although auxiliary energy saving has not been the major focus of this first pilot installation, the electrical COP (chilled water capacity per driving electric input) is about 7 to 10. The daily electrical COP comprises also the pumping energy during regeneration of the latent heat storage during night time and reaches values between 4.5 and 8 depending on the stored heat in the latent heat storage and the ambient temperature. capacitiy / kW 20 18 16 14 12 10 8 6 4 2 Absorption chiller COP electrical / - 20 chiller in operation hot water / kW COP electrical / - chilled water / kW total electricity consumption / kW time / hh:mm 0 0 9:00 11:00 13:00 15:00 17:00 19:00 21:00 18 16 14 12 10 8 6 4 2 24 20 16 12 8 4 0 -4 -8 Dry cooler and latent heat store capacitiy / kW chiller reject heat heat dissipation by dry cooler stored heat in latent heat storage chiller in unloading the latent heat storage dry cooler latent heat storage operation time / hh:mm -12 9:00 12:00 15:00 18:00 21:00 0:00 3:00 6:00 9:00 Fig. 4. Operational data of the solar cooling system during the course of a typical day During hot ambient conditions (10 a.m. to 8 p.m.) the latent heat storage supports the dry cooler with maximum cooling water temperature about 33°C. The discharging of the latent heat storage is controlled with regard to the actual heat content (here from 0 to 6 a.m.). Temperature / °C 38 36 34 32 latent heat storage OUT dry air cooler OUT -> latent heat storage IN 30 28 26 24 ambient temperature 22 20 18 16 unloading the latent 14 chiller in operation heat storage time / hh:mm 9:00 11:00 13:00 15:00 17:00 19:00 21:00 23:00 1:00 3:00 5:00 7:00 9:00
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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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3.1 Adsorption Systems Table 1: Ads
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4 Heat Rejection There is a number
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M M IEA SHC Task 38 Solar Air Condi
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IEA SHC Task 38 Monitoring Procedur
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Table of tables Table 1 List of ele
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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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Cuestionario para propietarios de i
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Questions to Package Solution Provi
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9. Maintenance o What type of maint
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Grundprinzip Solare Wärme thermisc
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- Leistungsvergleich von verfügbar
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Subtask A: Pre-engineered systems f
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Abb. 3: Das Bürogebäude in St. Sc
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a) b) c) Abb. 9: Installation eines
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Subtask C: Modelling and fundamenta
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Liste der Systeme im Monitoring von
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Liste der Systeme im Monitoring von
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Marletta, L., Evola, G. and Sicurel
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Tekniker Centro Tecnológico Teknik
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IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

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