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Article #355Re: halogen lamps for heating
From: Jeff Gates
Date: Wed, 18 Nov 1992 07:27
Date: Wed, 18 Nov 1992 07:27
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dt89csc@brunel.ac.uk (C S Codrington) writes: >Does anyone out there know anything about the use of Halogen lamps for heating food. I want to use a Halogen lamp in a kettle instead heating element. >Is this feasible? >Is it cheaper? 1) _Why_?????????? 2) Sounds like a nasty thing to do to a halogen lamp. 3) Halogen lamps are optimized to put out _light_, not heat. 4) If you want a "novel" way of heating cups of coffee, try microwave. I am told it is actually cheaper (i.e. less energy) to put a single cup of water in a microwave oven to boil it than it is to boil the water in a kettle - mainly because a kettle requires a minimum amount of water to ensure the element is covered. About 2 cups is the break-even point, I am told. The other reason microwave is good, though, is that it heats the milk, and the cup itself, at the same time - so if your control was good enough, you would be taking the whole mixture to exactly the temp you want, rather than boiling the water and then having it cool down again in contact with the cold cup and milk. Of course, capital cost is a different story! | jeff@minmet.uq.oz.au | Jeff Gates, Dept Mining | _--_|\ | Ph. direct: +61 7 365 3726 | & Metallurgical Engineering | / B | Ph. Dept: +61 7 365 3738 | University of Queensland | \_.--\_/ | Fax: +61 7 365 3888 | Brisbane Qld 4072 Australia | v
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Newsgroups: sci.engr Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!bunyip.cc.uq.oz.au!mama!jeff From: jeff@mama.minmet.uq.oz (Jeff Gates) Subject: Re: halogen lamps for heating Message-ID: <jeff.722071667@mama> Sender: news@bunyip.cc.uq.oz.au (USENET News System) Organization: Prentice Centre, University of Queensland References: <Bxt5s0.M8@brunel.ac.uk> Date: Wed, 18 Nov 1992 07:27:47 GMT Lines: 25