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- Xref: sparky sci.energy:6584 misc.consumers.house:16222
- Newsgroups: sci.energy,misc.consumers.house
- Path: sparky!uunet!elroy.jpl.nasa.gov!decwrl!adobe!pngai
- From: pngai@adobe.com (Phil Ngai)
- Subject: Re: Domestic Water Heaters - oil vs. electric
- Message-ID: <1993Jan2.055232.5497@adobe.com>
- Sender: usenet@adobe.com (USENET NEWS)
- Organization: Adobe Systems Incorporated
- References: <dbliss.6@fox.nstn.ns.ca> <BzoMuq.F7z@world.std.com> <1hvil4INNbje@morrow.stanford.edu>
- Date: Sat, 2 Jan 1993 05:52:32 GMT
- Lines: 16
-
- In article <1hvil4INNbje@morrow.stanford.edu> ho@sumex-aim.Stanford.EDU (Hiang-Kwee Ho) writes:
- >However, in theory (and in practice in some cases), a much more efficient way
- >of heating is to use a heat pump. Since a heat pump produces typically
- >3-7 times the amount of heat for a given input of work (or electricity), its
- >performance beats the performance of any oil or electric water heater by
- >a wide margin. (The actual "efficiency" or coefficient of performance of the
- >heat pump depends on the initial temperature of the cold water, the desired
- >hot water temperature etc.)
-
- For making hot water at useful temperatures during the winter, I believe
- that heat pumps are unsuitable. What is the max delta T you can achieve
- at a profitable efficiency with a heat pump?
-
- --
- My opinions are my own.
-
-