2004年12月22日 · Was told recently by an engine manufacturer that by decreasing the fuel oil temperature at the fuel oil rail to my engines by 10 degrees F will give me approximately a 1% increase in efficiency. Has anyone heard of this? If so, do you know where i might be able to find a 110vac operated...

2013年1月22日 · hello can someone please advice me on why do we select the chilled water pump in the closed loop at 1500 RPM Why cant we select the pump at 2900 rpm...

2008年1月27日 · The second possibility is that the central pump is not large enough to give me the total GPM requirement. In that case, my booster pump head probably needs to account for its flow all the way back through the central pump, chiller, etc, correct? And will that cause issues since I will now be bringing more flow through the chillers?

1999年12月3日 · I use a Chilled water pump on VFD, to augment my chilled water system, and it seems to work pretty well. Over the years, systemic changes to the building have seen an increase of fan coil unit use (they are practically everywhere!), and this was putting our system out of specification (at some point, operator would have to put on another chiller, even though from historical perspective in the ...

2019年12月13日 · Thanks TugboatEng. I understand the general principle to size any pipes or ducts for fluid or air. But I'm wondering if there is any chart or table that is available for diesel fuel and generator exhaust hot gas so that I can use to check the fuel pipe size and the chimney size, same as that we normally do for e.g. steel pipe sizing for potable water or sheet metal air duct sizing for room air.

2024年11月4日 · I just ask for the plan dimensions. Rooftop air handling units are usually in the 50 to 60 psf range (but more for a chiller). One thing to look for is the snow drift when the unit gets to be over 15' wide.

2022年11月6日 · If I'm understanding this system correctly, the expansion valve at the chiller inlet would only change the vapor-liquid ratio in the chiller and 1st stage compressor section. As long as the compressor is capable of dealing with the amount of vapor that is formed in that particular section, the pressure should stay within normal operating range.

2007年7月20日 · Pump manufacturers such as B&G offer the same pump in either a base mounted or a close-coupled design. I am wondering why close-coupled pumps are used so infrequently when compared to base mounted pumps. Base mounted pumps need to be aligned, which requires special skills and tools. I suspect...

2003年9月22日 · Chillers are kind of like electric motors. Electric motors life cycle operating costs are comprised of about 4% initial purchase cost, and 96% future energy cost. A $100,000 chiller may use $2M in electricity over its life, a better $125,000 chiller may use $1.25M in electricity over its life. Especially a chiller that is fed cold CWT, say 75F.

2003年4月15日 · Onan/Cummins (Emergency Generator) Application manual requires black steel pipe for diesel fuel lines - Do not use galvanized fuel lines, fittings or tanks. Condensation in the tank and lines combine with sulfur in the fuel to produce sulfuric acid. The sulfuric acid reacts with zinc in the galvanized coating and contaminates the fuel.