Though it is clear that coil selection has energy use impacts on both air-side and the water-side flows, we review only the water-side issue. The design approach promoted by the Micro-Electronics Facility Efficiency Workshop (1995), uses Low Face Velocity/High Coolant Velocity, or LFV/HCV that, "lowers the typical pressure drop across the coil because it uses typically half the rows of coils of a conventional design. It also allows for greater heat transfer efficiency and may allow the chilled water supply temperature to be raised slightly." In addition, careful analysis and selection of a preheating/cooling coil can optimize energy savings for the climate in which the laboratory is located. If variable speed pumping is used as well, flow-rate reductions of more than 50 percent can be realized when the outdoor dry-bulb temperature drops from 100°F to 75°F.
