Recent content by raingal79

Hi all, I need some help with chilling system. I understand there are a few types of absorption chiller units using different refrigerant e.g. lithium bromide and freon etc. However, all these require cooling water/ sea water. Are there available technology in the market such that we do not...

if that's the case, appreciate someone can share how to determine for a blocked section of liquid in pipe, whether or not thermal relief v/v is required. thanks.

I have looked through CRC handbook but couldn't find also. I looked under the appendix - for liquids. Any advice on the 2nd question regarding the difference between coefficient of cubical expansion versus coefficient of thermal expansion.

Dear all, I would like to ask about liquid thermal expansion in a blocked section of pipe. I'm wanted to calculate the estimated pressure rise in a pipe and have searched through the internet for information. I found that we can do so by using: dP = expansion coeff * dT / isothermal...

Onno, I'm not referring to water. I'm just using a general term "liquid". Surrounding tempt is around 28 - 38 degC. Raingal

Onno, I'm not referring to water. I'm just taking a general term "liquid" as a whole. Surrounding tempt varies from 28 - 38 degC.. Raingal

Dear all, I would like to ask for some advise regarding thermal expansion of liquid in a pipe. There are 2 cases: 1) For liquid trapped in a pipe without external heat source except from the surrounding, I want to know how can I calculate the increase in the pipe pressure if I know the...

Thanks for replies. The incinerator handles EG waste and so I can expect the flue gas to consist of CO2, H2O, N2 and O2 and small amount of NO, NOx (~20ppm), CO (~100ppm). Low purity water is just like demin water. I am also thinking along the line that it could have been due to the flow...

Hi, Flue gas from incinerator goes through to a stack whereby the gas is 'sucked' through a venturi srucbber and scrubbed with low purity water to remove any dust particles in the gas. Recently we experienced the section just above the gas inlet nozzle to the stack thinning off and it was...

Hi, For purification column operation, if the feed rate to the column is increased in order to increase top side draw of high purity product, what should be the change to reflux rate, reboiler steam input etc to ensure that there's no flooding in the column? WHat do I expect to see in the...

Thanks for the reply. As I understand controller setting helps to bring pv closer to sv and how does it impact the mv of valve then?

Hi all, I have an issue with control valve controlling level in upstream vessel. Deviation of pv value from sv value is approximately 2% and yet the valve output (mv) hunts from 0 to 100%. Is this a valve mechanical problem or controller setting problem (PID control)? Thanks.

May i know why dissolved O2 in water system can cause corrosion problems in pipes e.g. pitting?

Hi all, For waste water stream discharge from incinerator to open sea, i need to design a strainer to filter out the particles in waste water stream that comes from castable dropoff and also salt content in incinerator. pls advise how should i determine the mesh size required and what's the...

Thanks for your response. Atomizing medium for our incinerator is compressed air. Chokages are observed around the incinerator throat, quench scrubber nozzles and venturi spray nozzles, and not the atomizing nozzles. Recently, in addition to the chokages, thick plume from incinerator stack is...