For flow control at the outlet of chiller and condenser and at the inlet of cooling tower cells we have been using Globe valve or Balancing valves to set the correct flow across respective equipments.
One of the vendor wants to use butterfly valve as isolation as well as flow control, Is it...
The pumps we re talking about is the Centrifugal Back Pull out pumps for chilled water and cooling water application.
Suction of the pump over sizing is understandable for ensuring positive suction to pumps.
Discharge length is hardly 2 or 3 meters and in this line isolation valve and non...
Can you please let me know the difference between the thermal diffuser and Powered VAV.
Where it more apt to use Thermally actuated diffuser and where powered VAV box.
Can Thermal diffuser can be used where there is no VFD/VSD on AHU fan Motor.
We normally size the pipes and isolation valves strainer or suction strainer cum flow straightener from suction of the pump to the suction header as the same size of suction size in the pump. Similarly the discharge line up to header with isolation valve and non return valve is same size as the...
We have Chilled water system with Three Chillers catered by Four Primary Pumps and four Secondary pumps primary pump flow is 155 Meter cube per hour, where as secondary pump is 117 M3 per hour.
The suction at Secondary pump is negative Inlet pressure to Chiller from primary pump is 1.8 Kg/cm2...
mauricestoker (Mechanical)
Room air changes will be 13 to 15 for any normal air conditioned space. This will increase as we go for Class 10000, class 1000 class 100 etc.
Fresh air change shall be based on ASHRAE 5 cfm per person and 0.06 cfm per square feet of the area, if it is designed for...
We feel having on/off motorized valve in the outlet of the condenser&chiller to stop low whenever the respective chiller is not in operation.
And cooling tower can be programmed based on leaving temperature of cooling tower i.e cooling water inlet. Based on the cooling water inlet sensed from...
The Hot well cold well tank is for Paper mill where AHU FCU's located in all control rooms, I/O Rack Rooms drive Rooms offices and MCC rooms.
There is small quantity for process cooling also.
Earlier they were having only primary pump concept with expansion tank located at top most point of...
For pumps off late many of the consultants suggest Suction strainer cum flow straightener instead of conventional Y-strainer or pot strainer( for larger diameter).
Request to elucidate with the specific advantages and limitations of the Suction strainer cum flow straightener.
Is there any formula to ascertain the bleed off recommended for cooling towers to ensure concentration build up in the cooling water system.We find many of the cooling towers does not have the provision for bleed off thereby the refrigeration system operates almost same condensing temperature as...
Best way to do the heat load for summer time and if the tank is inside under roof. Then it is better to treat underneath roof with Radiant barrier film which reduces the radiation heat down to tank substantially.
If the tank is above ground in open space then also external radiant barrier film...
