BTU Output Vs. Lbs of Coal, Am I Calculating This Correcly?

lsayre · Post by **lsayre** » Sun. Jan. 16, 2011 9:46 am

You just made the unit 133% efficient. Think about it again.

JBorden · Post by **JBorden** » Sun. Jan. 16, 2011 9:53 am

My error you are correct sir

. Thats right you need more BTU's to get the proper out put thus in turn you need more coal... again my error.

lsayre · Post by **lsayre** » Sun. Jan. 16, 2011 10:01 am

Now if it only was possible to make it 133% efficient, that would truly be something. Coal fired heat-pump anyone?

Post by **franco b** » Sun. Jan. 16, 2011 10:36 am

lsayre wrote:Now if it only was possible to make it 133% efficient, that would truly be something. Coal fired heat-pump anyone?

I think it is possible. see link.

Would This Work?

CapeCoaler · Post by **CapeCoaler** » Sun. Jan. 16, 2011 12:48 pm

130,000/13,500=9.63 lbs/hr...
easier math too...

lobsterman · Post by **lobsterman** » Tue. Jan. 18, 2011 9:39 am

I used 27,000 BTU per hour of natural gas firing forced hot water, average, in the coldest winter months. This came from a 130,000 BTU per hour boiler so it was running about 20% of the time. Now the forced hot water does not run at all, and I get those same BTUs (approximately) from the Chubby running continuously. As many have said before me, the key is circulation of this heat to where you want it. The Chubby is perfect for my house because it is in my prime living space putting most of the heat into the 3 rooms that are used the most. But the natural circulation is not too bad: the whole house is still heated to an acceptable level. My point is there is no magic or no free lunch here. If you know your oil/gas use, you can estimate your coal use and stove needs.