Chilled Water Pump Pressure

Support pumps and piping separately so that weight of piping system does not rest on pumps or its support.

Chilled water pump pressure.

This guide covers the design and selection of a chilled water pump. Chilled water pumps are used in ac application multistoried buildings air conditioning is based on chilled water principle. Centrifugal pumps require a net positive suction head npsh to ensure a minimal pressure on the inlet of the pump. The chilled water pump is used to circulate chilled water in a closed system.

Install pressure gauges on chilled water pump suction and discharge lines in such way to be easily readable and completely isolated from vibration. 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. The units are generally large end suction or horizontal split casing pumps running at 1450 rpm. 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.

Chillers can be found in residential applications commercial buildings and industrial process applications. 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. 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. Control of the chilled water from pressure to velocity to volume is up to the control system controlling the pumps and valve actuators in the system.

Chilled water pumps circulate the water through the pipes and heat exchanger.