04-28-2003, 04:45 AM | #11 | |
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04-28-2003, 08:33 PM | #12 |
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Maybe I should have said the energy to run the Stirling would be free. Of course with human nature what it is there would be the cost of labor to account for.
The solar panel on my house receives free sunshine, but the cost of the system including an 84 gallon water heater with electric backup was 1400 dollars 20 years ago installed. So the cost of heating that water was 1400X20 or $70 a year until the heater tank began leaking and got replaced with an all electric one. I kept the circuit breaker to the water heater turned off, so there was no electric use except to run a 1/100th horsepower circulating pump. Even at that, $70 a year was far cheaper than having heated the water by electricity. |
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