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IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask C2-A, November 9, 2009 Greek letters η effectiveness (-) ρ density (kgm -3 ) ∆ difference (-) ϑ temperature (deg C) Subscripts A Absorber Acc Cooling water inlet Ach Cooling water outlet C Condenser d Duehring E Evaporator Eh Chilled water inlet Ec Chilled water outlet ext external G Generator Gc Hot water outlet i simulation time interval in inlet int internal meas measured p pump p, pc at constant pressure s strong sim simulated sol solution st storage SHX solution heat exchanger sG strong solution leaving the generator tube bundle sA strong solution leaving the generator sump and entering the absorber t tube tb tube bundle out outlet v vapour w water, weak wA weak solution leaving the absorber tube bundle wG weak solution leaving the absorber sump and entering the generator X general index for vessels (X=A, C, E, G) Performance analysis The internal consistency of the model can be analysed by applying a step change to one of the external parameters in the model. A step from 75°C to 85°C in the hot water inlet temperature has been used for this purpose. Cooling and chilled water inlet temperatures page 80
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask C2-A, November 9, 2009 have been kept constant at 27°C and 18°C, respectiv ely. The simulation interval was 1s. The temperature step was set at 200s after simulation start. This time period is necessary because the preset steady-state is not exactly met by the model: after starting the simulation first the steady state with the given input values has to be reached. 200s are enough in order to equalize the differences between initial and steady-state values. For the consistency analysis no thermal storage terms were assumed, just solution mass storage and a transport delay of 2 steps or seconds between generator and absorber and 1 step or second the other way. These very short transport delays were chosen to speed up the simulation. Figure 1 shows some internal variables for a short time period before and after the temperature step. Figure 2 shows the external heat flows before and after the temperature step. Each marker symbol in the graph denotes one simulation step. page 81
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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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M M M IEA SHC Task 38 Solar Air Con
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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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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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Country Name/ Company City Applicat
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79 Spain Private House Olivares-Sev
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Questionnaire for Owners of Small-S
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Fragebogen an Besitzer solare Kühl
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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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Hintergrund Operating Agent: Hans-M
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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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Beispiele realisierter großer Syst
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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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Ellehauge & Kildemoes Vestergade 48
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Tekniker Centro Tecnológico Teknik
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