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Friends I am working on the design of refrigeration system for a cold store with multiple evaporators connected to a water cooled condensing unit. Could someone please advice me on pipe sizing procedure for a multiple evaporator system. I know the sizing procedure for a single evaporator...

Thanks friends I think damage to environment should be the biggest concern. We talked to some of our suppliers for the quantity of refrigerant. It is huge (5~6 Tonnes???). We are not sure if this is correct. Is there any rule of thumb to calculate approximate quantity of refrigerant charge...

Friends This for an offshore drilling rig application. Brief specifics are as follows 1. Application : Offshore Drilling Rig 2. Location: Tropical 3. System : AHU’s with DX coil serving mechanical areas and Living quarters (approx 15 AHU’s) 4. Ambient : 35 deg C, 80% RH 5. Total Cooling Load ...

Thanks Lilliput1 Is it possible to get some references or some worked examples on web. I need something to show to the supplier as well as client that what we are saying is correct. Any reference material etc. would be a great help. I tried to search on net (and ASHRAE handbooks) but I could...

Hi Friends Iam reviewing the heat load calculations submitted by one of our suppliers. In the calculations I have noted that they have calculated the heat gain for exposed walls/Roof as follows 1. Heat gain due to transmission (using temperature difference based on outside and inside...

Friends I need some advice on following matter We have to install 300 RT chillers for HVAC System for our Semi Rig Project. The maximum operating pressure on water side is 10 Bar The Maximum operating pressure on Refrigerant side is 25 Bar My question is. This product needs DNV...

Dear Friends Is there any relation between Fouling factor and Condenser water flow rate.

Friends Could someone please advise on this matter. Is it required per codes (DNV) to install Air flow switch on inline duct heaters? For one of our semi rig project we intend to install air flow switch for duct heaters that are more than 2 kw ratings only, which means that any terminal...

Dear MintJulep Are there any benefits of using Pressure Differential Switch over a Pressure Switch? If I use PDS instead of PS, then one side should sense the fan discharge side pressure in the duct, but what should the other port sense. Room pressure or Suction side pressure?

I have to use these switches on the discharge side of the fans to know the status of fan. Switches are interfaced with platform control system to give an alarm incase discharge pressure from the fan drops below a set point From the response I understand that for this purpose, pressure switch...

What is the difference between a Pressure Switch and a Diffrential Pressure Switch?

Dear AbbyNormal Thanks for the valuable information. I tried to search Ruskin Website for Moisture eliminators but It seems it is not in their product range. Do you have any similar information for Moisture Eliminator with a Coalescer Pad. We have only moisture Eliminators with a Coalscing pad...

Thanks Chasbean1 and Abbynormal. We dont have Louvers at intake. We are putting marine grade Moisture Eliminators only at the air inlet which are sufficient to stop water ingress and take out salt also. I have further investigated this matter and to my surprise that in few of the old offshore...

Dear Friends Could someone please advice that what kind face velocities are generally considered for sizing Exhaust Louvers and Moisture Eliminators at air intakes Iam concerned about Noise and pressure drop. Is 6 m/s face velocity is good enough. Any information about any supplier specific...

Dear Friends Could someone please advice that what kind face velocities are generally considered for sizing Exhaust Louvers and Moisture Eliminators at air intakes Iam concerned about Noise and pressure drop. Is 6 m/s face velocity is good enough. Any information about any supplier specific...