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: 06/2011 3.1 Interview guideline The interview guideline for package solution providers (see Appendix 3) was set up for the purpose of information collection about package definition (included components, control items, maintenance and monitoring) as well as design indicators. Furthermore, the components which have to be designed separately were investigated. 3.2 Results Following results correspond to the feedback of five package solution providers of smallscale solar heating and cooling systems. The collected results are also presented in anonymous form, always referring to package solution provider one to five as “PSP 1” to “PSP 5”. 3.2.1 Design indicators PSP 1 has developed a design tool for selection of the cooling package size, based on weather data, calculation of heat rejection parameters and/or temperature levels of hot water, cooling water or chilled water. PSP 2 estimated the package size from available predesigned packages; Separated planning is necessary for the dimensioning of pumps and cold water distribution system. The packages of PSP 3, PSP 4 and PSP 5 were mainly custom-made by the package solution provider themselves or external planners. 3.2.2 Components included Table 3 compiles the components included in different package solutions provided by the interviewed package solution providers. Differences occur in the variety of components offered, for example PSP 1 and PSP 3 can provide dry, hybrid and wet heat rejection units while PSP 4 only offers wet cooling towers. Also the range of different chiller manufacturers is larger from PSP 1 and PSP 4 than from others. Back up is only mentioned as part of the package by PSP 1 and PSP 3. PSP 5 does not include the three pumps around the chiller in the package, only the solar thermal pumps are included. Water treatment is only mentioned as part of the package by PSP 1 and PSP 4. Cold storage is given as an option from PSP 3 and PSP 4. All of the interviewed package solution providers, except PSP 4, offer one system controller for the whole system up to the cold storage mainly developed by themselves. page 17
IEA SHC Task 38 Solar Air Conditioning and Refrigeration Subtask A Report, Date: 06/2011 PSP 1 PSP 2 PSP 3 PSP 4 PSP 5 ab/-adsorption chiller solar collectors solar pumps/heat exchanger hot water storage cold water storage pumps around chiller piping and hydraulics heat rejection water treatment back up system controller Table 3: Components included in package solutions 3.2.3 Control items included PSP 1 offers a very sophisticated system controller, taking into account the sorption chiller, heat rejection, solar thermal system, several other heat sources (e.g. CHP unit, biomass, etc.), distribution system (four mixed heating/cooling circuits) and room conditions; predefined control strategies, referring to 43 million hydraulic options, available in the system controller. Also PSP 2 system controller is part of the package, which takes the solar cooling system up to the cold water storage into account (not the water distribution system); pre-defined control strategies are stored at the system controller. The system controller of PSP 3 is custom-made and used for the whole installation including back-up and distribution, if required. The control system runs the chiller, the heat rejection system, pumps of all the loops and the back-up. PSP 4 offers two different controllers, which can communicate with each other; pre-defined control strategies are foreseen for applications with fan coils, chilled ceilings and sub zero cold production. page 18
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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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4 Heat Rejection There is a number
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IEA SHC Task 38 Monitoring Procedur
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Pompe évaporateur + compteur C3 Dr
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- Leistungsvergleich von verfügbar
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IEA Solar Heating and Cooling Programm - NachhaltigWirtschaften.at

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