Search results for query: *

Hi All, A lot of people are using the rule of thumb for chiller design, Chilled Water Supply = 7C, and Chilled Water Return = 12C. Why is that the case? I heard this can be explained using the psychrometric chart. Please advise. Thanks in advance. MM.

Hi, I am working on a fitness centre project where the interior space is very hot, around 29C. The design temp is 23C and the supply air off the AHU is 13C. However, the temp off the supply diffusers inside the premises is 16C and the temp further down the AHU duct is 17C. The building...

Hi All, Can a pnuematic pressure reducing valve (200-50 psig) working together with a spring pilot pressure reducing valve (50-15 psig)in the same pressure reducing station? Thanks in advance. Murphy

Hi, I posted this problem before. I have a condensate receiver tank that services all the low pressure condensate return from the building, as well as a 1/2" steam trap drip leg from the high pressure steam pipe. There is an occasional banging noise in the tank, sounded like waterhammering...

Hi, Does anybody know this heat exchanger manufacturer, Darling Brothers Limited, before? I have an HX from that manufacturer and need to get the specs of it. Thanks.

Hi, I have a small plate and frame heat exchanger that pre-heat the domestic water with low pressure steam. It is leaking from the holding bolt connection(the threaded bolt that is used to hold the plates together). What will be the cause? Does it need regasket and recondition of the plates...

Hi, I have a flash tank that requires daily draining through a drain line. The piping is as follow: one 70 psig condensate inlet line, one venting line to a safety valve, one outlet line to a FT trap set and an manual draining line at the bottom. Do I need to drain the tank regularly? Or...

Hi all, I might have talked about this problem already. I am designing a steam condensate receiver tank that services both HP (200 psig) and LP (15 psig) condensate from the building. Due to the building's budget, I am trying to design a single tank to service both pressure condensate. Is...

Hi, I have a question about steam condensate tank for a building. 200 psig steam is supplying to the building and it will be reduced to 15 psig after the pressure reducing valve. There is only one single condensate receiver tank for the building's low pressure condensate returns and the 200...

Hi, I am analyzing a steam to water shell/tube HX. When there is an increase in fouling, what changes should I expect on temperature and flow of both sides? Will the steam flow increase? Or will the temperature change? Thanks.

Hi, I am trying to figure out how much improvement in the HX efficiency after chemical-cleaned the water tube. It's steam-water HX. Any thoughts? Thanks in advance

Hi, When calculating heat loss through underground steam distribution piping, do I use sensible heating valve or total (sensible+latent) heating valve? Thanks in advance.

Hi, I need some help on calculating the energy balance for a steam-water HX. On the steam side, I am using the Q=m(hi-ho), hi=h(vapor) for steam inlet, ho=h(liquid) for condensate outlet, is that right or I should ho=h(liquid+vapor)? How do I determine whether the HX is efficient or not...

Hi, I am wondering will a new TD steam trap passes any steam during operation? I heard that a perfect condition TD trap will still passes some steam. Thanks.

Hi all, I am analyzing the steam loss in our steam distribution piping network. I have looked into the metering loss, insulation loss and steam quality loss, but they contribute a very small amount in comparison to the total line loss. Does anyone have any suggestions or ideas? Thanks in...