Chilled Water Pump Pressure

Chillers can be found in residential applications commercial buildings and industrial process applications.

Chilled water pump pressure.

Condensate pumps often deliver water from an atmospheric receiver to a deaerator operating at 5 psig meaning that in addition to the other heads the pump must overcome a pressure head of 5 psig. This guide covers the design and selection of a chilled water pump. Centrifugal pumps require a net positive suction head npsh to ensure a minimal pressure on the inlet of the pump. Install piping accessories hangers and supports anchors valves meters and gages and.

Support pumps and piping separately so that weight of piping system does not rest on pumps or its support. The chilled water pump is a part of an overall chilled water system that often includes a chiller piping valves fittings expansion tank air handling units and fan coil units. One psig equals 2 31 feet so the differential head in this application is 5 x 2 31 11 6 pressure head is a consideration only in some open systems. Chilled water pumps circulate the water through the pipes and heat exchanger.

The units are generally large end suction or horizontal split casing pumps running at 1450 rpm. Install pressure gauges on chilled water pump suction and discharge lines in such way to be easily readable and completely isolated from vibration. Chilled water pumps are used in ac application multistoried buildings air conditioning is based on chilled water principle. The chilled water pump is used to circulate chilled water in a closed system.

In addition to minimal inlet pressure the designer needs to calculate the pressure loss from resistance of the system via pipe friction loss and most importantly the pressure drop of the inlet strainer figure 2.