Passive Cooling Systems - Air Conditioning without the Need of Energy - INTERTEC-Hess - #1

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www.intertec.info Passive Cooling Systems Air Conditioning Without the Need of Energy 1 Introduction and Abstract Pipe Lines and Supply Networks often run through remote areas, like deserts, in which no safe power supply is always available. Measuring and supervision might be necessary in these areas too. SCADA systems have usually only small energy consumption and can be powered by solar cells with backup batteries. The maximum temperatures in the shade can be as high as 58°C and the solar radiation adds additional heat. Without any cooling the temperatures in shelters and housings may exceed 80°C. In these conditions electronic equipment will not function reliably any longer. Active air conditioning systems, such as compressor and absorber air conditioners, require too much energy to function with solar cells. The solution is passive cooling. How does that function? Passive Cooling Systems use the high temperature differences (∆T) between day and night, which arise in arid desert regions. The thermal capacity of heat distribution medium, e.g. water, stores the coolness of the night to keep the interior at a moderate temperature during the day. A Passive Cooled Shelter is an integral system consisting of housings with insulation, sun shade, external and internal heat exchangers, heat storage and conveyance of the medium, which must be designed for the specific application. INTERTEC engineered, built and supplied a number of passively cooled cabinets and shelters for projects of customers such as Saudi Aramco, ADCO, TR, Siemens, ABB or Cegelec with the self developed dynamic simulation tool INTERSIM. INTERTEC-Hess GmbH · Raffineriestraße 8 · D-93333 Neustadt/Donau · Tel: +49 (0) 9445/95 32-0 · Fax: +49 (0)9445/95 32 32