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Santeri, In my experience, it is not overly difficult to find heat pump performance data. Try Florida Heat Pumps (http://www.fhp-mfg.com/) as they have a fairly extensive line of water to water heat pumps. It is also nice that heat pumps normalize fairly well. That is to say that if you take two heat pumps and divide their performance at off-design conditions by the corresponding rated condition, both heat pumps will end up looking quite similar. It is, however, comparatively difficult to get data for absorption chillers. If you are not finding printed catalog data, you might try calling a manufacturer's representative; they may have access to data that you can use. Also more and more often manufacturers are developing in-house software to assist in assessing off-design performance. I have had some luck in getting manufacturers to let me use the software and then making a performance map of my own. One word of caution: absorption chiller performance does NOT normalize well. Best, David On 5/10/2012 08:33, Santeri Siren wrote: Dear all, -- *************************** David BRADLEY Principal Thermal Energy Systems Specialists, LLC 22 North Carroll Street - suite 370 Madison, WI 53703 USA P:+1.608.274.2577 F:+1.608.278.1475 d.bradley@tess-inc.com http://www.tess-inc.com http://www.trnsys.com |