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From: Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Newsgroups: sci.electronics.design
Subject: Re: Product idea
Date: Tue, 18 Feb 2025 01:32:12 -0000 (UTC)
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Carlos E.R. <robin_listas@es.invalid> wrote:
> On 2025-02-18 01:24, Phil Hobbs wrote:
>> Carlos E.R. <robin_listas@es.invalid> wrote:
>>> On 2025-02-13 03:00, Phil Hobbs wrote:
>>>> Carlos E.R. <robin_listas@es.invalid> wrote:
>>>>> On 2025-02-12 10:51, Liz Tuddenham wrote:
>>>>>> Carlos E.R. <robin_listas@es.invalid> wrote:
>>>>>> 
>>>>>>> On 2025-02-12 01:48, john larkin wrote:
>>>>>>>> On Wed, 12 Feb 2025 00:57:33 +0100, "Carlos E.R."
>>>>>>>> <robin_listas@es.invalid> wrote:
>>>>>>>> 
>>>>>>>>> On 2025-02-11 22:49, Don Y wrote:
>>>>>>>>>> On 2/11/2025 2:00 PM, bp@www.zefox.net wrote:
>>>>>>>>>>> Don Y <blockedofcourse@foo.invalid> wrote:
>>>>>>>>>>>> On 2/11/2025 11:19 AM, bitrex wrote:
>>>>>>>>>>>>> A lot of people in e.g. mobile homes in New England and (other areas
>>>>>>>>>>>>> of the US
>>>>>>>>>>>>> it gets cold in the winter) are stuck with baseboard electric heat;
>>>>>>>>>>>>> since the
>>>>>>>>>>>>> new administration is so big into crypto it should be decreed that
>>>>>>>>>>>>> all electric
>>>>>>>>>>>>> space heaters sold in the US should mine crypto, and for the
>>>>>>>>>>>>> baseboards you
>>>>>>>>>>>>> could also have the baseboard form factor crypto miner.
>>>>>>>>>>>> 
>>>>>>>>>>>> And, the occupant gets to KEEP any coin that he mines!
>>>>>>>>>>> 
>>>>>>>>>>> Which begs the question, will the earnings pay the electric bill?
>>>>>>>>>> 
>>>>>>>>>> I think bitrex's point was that the person NEEDING heat has
>>>>>>>>>> already decided to spend the money on the electricity required.
>>>>>>>>>> The realization that the heat could be generated while "doing
>>>>>>>>>> useful work" is insightful.
>>>>>>>>>> 
>>>>>>>>>> [I believe electric (resistance) heat is among the least? cost effective]
>>>>>>>>> 
>>>>>>>>> A heat pump is the most productive, of the electrical heat sources.
>>>>>>>>> Mining crypto, dunno.
>>>>>>>> 
>>>>>>>> Couldn't you burn gas, boil water, spin a generator to make
>>>>>>>> electricity, and heat your house with the condensate heat?
>>>>>>>> 
>>>>>>>> That would make free electricity.
>>>>>>> 
>>>>>>> Certainly, and it has a name. Combined cycle, or something similar. It
>>>>>>> is a simple as running a diesel generator and heating the house with it
>>>>>>> radiator, and a heat exchanger on the exhaust.
>>>>>> 
>>>>>> What is the design life and replacement cost?  Writing off the
>>>>>> investment over a few years could work out more expensive than the
>>>>>> electricity it saved.
>>>>> 
>>>>> You have to ask somebody else about that. :-)
>>>>> 
>>>>> I read, maybe decades ago, that it was in fashion for businesses in
>>>>> Britain to do this, and they surely dir make the numbers.
>>>>> 
>>>>> The calculation was done for the heating of the building. The
>>>>> electricity was extra gains.
>>>>> 
>>>> 
>>>> Of course when the engine drops a valve on a New Year’s Day with 20 degrees
>>>> of frost, you can’t get it fixed before all your pipes freeze and flood the
>>>> house.
>>> 
>>> Then use air ducts, as the Canadians :-)
>> 
>> I’m Canadian myself, but I never got the knack for washing and cooking with
>> air alone. I’d probably be thinner if I had. ;)
> 
> Heh. No, for that you use electricity. As the combined generator is off 
> (broken), you don't have the space heating, but you still get 
> electricity from the network.

To be a bit clearer, the domestic water pipes freeze and burst too. 

Cheers 

Phil Hobbs 

-- 
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics