Has anyone witnessed unstable (unsteady) flow in a chilled water system, where GPM surges are observed? I know of two situations where flowmeters indicate a cyclic change in flow of large magnitude in a period of seconds. For one of the two locations, the cyclic nature of...
Mechanical Engineering magazine had an interesting article in December '94 r.e. the future of magnetic refrigeration. I'm interested in knowing whether this is moving anywhere with respect to conventional HVAC equipment. There was some speculation at the time that it might be applicable to...
I do not work in the nuclear industry. However, I work with a district heating system that uses pressurized hot water. I would like to know if there is a similar experience base in the two industries. Specifically, in a typical district heating system, one might be dealing with 380 F...
I work at an airport with a large chilled water system, 2.2 million gallons of chilled water storage, 5 chillers @1150 tons, and a design water temperature rise of 18 F (starting with 42 F water). We've learned some valuable things about achieving a high water temperature rise. I'm interested...
The heat exchanger is about 14 feet long, has "high temperature water" (primary side) entering at 380 F, approximately 32" head gasket diameter, 4 pass, and secondary water entering at approximately 150 F. High water temperature drop on the primary (say 200 F) and minimal temperature rise on...
