Chilled Water Pumping Systems
Found 6 free book(s)Energy Saving Fact Sheet Chillers
files.nc.govCentral building cooling options include water chillers and direct-expansion (DX) A/C units. Chillers use a re-frigeration cycle to cool water to 42º F to 55º F for pumping to chilled water cooling coils. Air is then blown over the chilled water cooling coils to provide cool air to the conditioned space. DX systems also use a refrigera-
HVAC Systems: Overview
ceae.colorado.eduChilled water distribution Central cooling and heat rejection . Michael Brandemuehl ... Variable speed pumping ... Air Handling Units Water distribution Cooling coils Pipes and pumps Primary HVAC Systems Electric chillers Air and water cooled
Variable Volume Chilled Water Pumping System Controls
daytonashrae.orgVariable Primary Chilled Water Pumping System with Bypass Valve & Flow Meter • Single Chiller, Single Variable Speed Pump. 2-way valves at all chilled water coils and bypass loop with 2-way valve • The single primary pump pumps water through the chiller and to the coils. • Water Differential Pressure Transmitter near the end of the piping run
Condenser Water Temperature Control - Trane
www.trane.comchilled water could operate with an entering co ndenser water temperature below 50°F, as long as the leaving condenser water temperature is gr eater than or equal to 55°F. If you have chillers with older controls, refer to previous revisions of this bulletin for pressure differential minimums.
BALLCENTRIC PLUG VALVE - Henry Pratt Company
www.henrypratt.comwith a –20°F to 212°F temperature range. Used on sewage, water, hydrocarbon and mineral oils. EPDM An excellent polymer for use on chilled water through to LP steam applications having a temperature range of –35°F to 250°F. Resistance to many acids, alkalies, detergents, phosphate esters, alcohols and glycols is an added benefit. NEOPRENE
Understanding Net Positive Suction Head
www.pumpschool.comSoda water is a good example of a high vapor pressure liquid. Even at room temperature the carbon dioxide entrained in the soda is released. In a closed container, the soda is pressurized, keeping the vapor entrained. Vapor Pressure 0 5 10 15 20 25 40 60 80 100 120 140 160 180 200 212 Temperature (°F) Vapor Pressure (psia) Water Soda