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IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask C2-A, November 9, 2009 2. Experimental validation The experimental desiccant installation at La Rochelle [1] was used to validate the model presented above. The desiccant air handling unit consists of silica gel desiccant wheel, an aluminum sensible regenerator, two rotating humidifiers, high performance ventilators, a regeneration heat exchanger (water to air) and an electrical backup used for experimental purpose. The air handling unit is powered by 40 m 2 of heat pipe vacuum tube collectors and storage tank of 2350 liters. Psychrometers are used to measure the moist air properties at each section of the air handling unit (position 1 to 9). Each psychrometer consists of 2 Pt100 sensors: the first delivers the dry bulb temperature and the second the wet bulb temperature. The local atmospheric pressure is measured too thus the humidity ratio and relative humidity can be accurately measured. The temperature of hydraulic system is measured by the means of Pt100 sensors integrated to the pipes by means of thermo wells. All the Pt100 sensors were tuned on a temperature range going from 0° to 100°C . The water flow rates are measured using ultrasonic sensor. The air flow rates were measured using the gas tracer method.In the difficulty to tune a pyranometer the solar global radiation is measured using two different pyranometers. Figure 1 shows a general scheme of the experimental installation. In order to test different outside operating conditions (to test the models under different conditions) an outside conditions simulator was coupled to the desiccant air handling unit. The outside conditions simulator consists of a pre-heater, a humidifier and a heater, this permits the test at high temperatures and high humidity ratio. The cooling load on the installation was controlled using load simulator that consists of heater and replaces the building load. This permitted to control the return conditions during the tests. For the model validation different operating were considered for all the components. page 34
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask C2-A, November 9, 2009 Valve Tank Collector Solar installation Pump Heat exchanger Pre heating Heater 9 Backup 8 7 Fan 6 5 Regeneration heat exchanger Humidifiers Outside air Humidifier 1 Desiccant wheel 2 Sensible 3 4 regenerator Outside conditions simulator Desiccant air handling unit Load simulator Figure 6: Experimental solar desiccant cooling installation of La Rochelle page 35
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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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IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

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