help w/ engr calcs
re: How much electricity to bake a loaf and then also to cool the house from the heat generated.
(from Kwh i can compute cost via the marginal $/kwh price.)
I want to estimate the electricity (KWH) needed to bake a loaf _and_to cool the house from the added heat.
Math/engineering comments/corrections are invited.
Guesses/assumptions about the oven:
.75 hours at average 2,000 watts to preheat oven and cast iron dutch oven. 1.5 Kwh.
1.25 hrs (75 min, it's a 1200 g ww boule) at average 1,000 watts to maintain heat. 1.25 kwh.
2.75 kwh total.
It's resistive heating, so I assume it all goes to heating the house (worst case scenario): 2750 watt-hours * 3.4 btu/watt-hour = 9350 btus.
I guess I could turn off everything else in the house and take a meter-reading before and after baking to get a better kwh number.
My question, how many Kwh will be consumed by my central air conditioner to provide 9350 btu of cooling? What is the likely efficiency of that conversion?
The outdoor unit (compressor) looks 20 years old. The indoor unit looks at least 30 years old.
Anyone have any estimates on the ac's efficiency percent on the kwh/btu conversion?