How Do You Convert Joules to Kilowatt-Hours for Hotel Energy Monitoring?

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SUMMARY

The discussion focuses on converting joules to kilowatt-hours (kWh) for monitoring energy usage in hotel rooms. A total energy consumption of 20,000,000 joules (20 MJ) is recorded, with a voltage supply of 240 V. To convert joules to kWh, the formula used is: kWh = joules / 3,600,000. This results in an energy consumption of approximately 5.56 kWh for the specified period.

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skyla.haimes
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To monitor the electrical energy usage of a room in a hotel, the 'Carbon Cops' install some measuring instruments. These gather data over 24 hrs as follows:
- Total number of joules of energy used=20000000J (20MJ)
- Voltage supplied = 240 V

Convert the number of joules into kWh.
 
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Welcome to PF.

What are watts?

Joules/s ... so how many seconds in an hour?

That's watts/hour, so how many kw/h ?
 

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