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IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask C2-A, November 9, 2009 Figure 23: Evolution of air and desiccant properties for the process section in function of the wheel width and the angular position We notice that for a given angular position the air humidity ratio decreases with the width of the wheel and yields a temperature increase. The dehumidification increase significantly in the first angular sector of the process (0-40°) and reaches its minimum and then increases slightly with the angular position. This behavior of the humidity is due to the fact that after the regeneration; the desiccant is dry and when reaching the process it starts to dehumidify and then starts to saturate. The other reason is the heat of adsorption that heats the desiccant which reduces its adsorption capacity. While examining the air temperature and humidity ratio profiles we notice a certain angular delay of the dehumidification in comparison with the temperature increase. This can be explained that the desiccant coming from the regeneration is very hot and has a limited adsorption capacity. So in the process sector; outside air must first cool the desiccant and then dehumidification becomes effective. The figures below show a similar behavior in the regeneration sector. page 52
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask C2-A, November 9, 2009 Figure 24: Evolution of the air properties in the regeneration section as a function of the width and angular position Experimental validation With the difficulty to measure the temperature and humidity inside the wheel for the detailed model only the temperature and humidity profiles as well as the mean temperature and humidity ratio at the outlet of the wheel will be validated. In order to validate the temperature and humidity distribution at the outlet of the wheel, 3 psychrometers and 3 Pt100 temperature sensors (3 humidity measurments and 6 temperature measurements) are used in order to validate the profiles as shown in the below. Figure 25: Psychrometers and temperature sensors distribution at the outlet of the desiccant wheel page 53
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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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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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IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

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