It's an empirical model of the refrigeration system. For single speed models there is a single set of performance curves that determine overall system performance. For two-speed systems there are 2 sets of performance curves. These curves define the "system" capacity and EIR at various operating conditions. Whether the single-speed model has 10 compressors and 8 condenser fan stages, or some other combination, or just a single compressor and condenser fan does not matter. What matters is that the performance curves reflect how that specific system performs at various indoor/outdoor conditions and part-load operation.
On 5/10/2017 3:48 AM, alyelhefni@xxxxxxxxx [EnergyPlus_Support] wrote:
Hi all,
I have a question in the single speed dx cooling coil, does single speed mean single speed compressor and single speed condenser fan ?
And the same for two speed, does two speed mean two speeds for compressor and two for fan ?
Thanks
-- Richard Raustad Florida Solar Energy Center 1679 Clearlake Road Cocoa, FL 32922 Ph: (321)638-1454 http://www.fsec.ucf.edu/en/ Program Director Electric Vehicle Transportation Center http://evtc.fsec.ucf.edu/
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