Pat Naughtin wrote in USMA 18495: >Dear Joe and All,
>However you do raise the point that CGPM are also confused on this issue, so >I suspect that we will not see any goal setting coming from there. Where did you get the idea that I thought the CGPM was confused? I think the CGPM is prudent and cautious. They certainly would not attempt to woo the public away from using minutes and hours. That attempt would produce derision and the public would consider the CGPM to be a bunch of crackpots. >Let's consider the examples that you stimulated with this posting. An air >conditioning installer might use watt-hours, kilowatt-hours, joules, >kilojoules, and megajoules on the same job without knowing that they are all >measuring energy. My point is that this would be simpler if there was >somewhere, someplace, at some time a clear statement that our goal was to >prefer joules, kilojoules and megajoules. I think the watt (or kilowatt) is the appropriate unit to use in the air-conditioning trade. Remember that the watt is the SI unit of mechanical power, and I believe it is used in Australia by the motor vehicle trade. The electric power required by the motor of an air conditioner is measured in watts. The mechanical output of the motor should also be in watts. The cooling power should also be in watts. (1 ton of refrigeration = 3514 W). Joseph B.Reid 17 Glebe Road West Toronto M5P 1C8 TEL. 416-486-6071
