this post was submitted on 25 Dec 2024
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I wonder if my system is good or bad. My server needs 0.1kWh.

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[–] [email protected] 3 points 16 hours ago (2 children)

Wh shouldn't even exist tbh, we should use Joules, less confusing

[–] Joelk111 3 points 15 hours ago (2 children)

Watt hours makes sense to me. A watt hour is just a watt draw that runs for an hour, it's right in the name.

Maybe you've just whooooshed me or something, I've never looked into Joules or why they're better/worse.

[–] [email protected] 3 points 11 hours ago (2 children)

Joules (J) are the official unit of energy. 1W=1J/s. That means 1Wh=3600J or that 1J is kinda like "1 Watt second". You're right that Wh is easier since everything is rated in Watts and it would be insane to measure energy consumption by seconds. Imagine getting your electric bill and it says you've used 3,157,200,000J.

[–] jg1i 6 points 9 hours ago (1 children)

3,157,200,000J

Or just 3.1572GJ.

Which apparently is how this Canadian natural gas company bills its customers: https://www.fortisbc.com/about-us/facilities-operations-and-energy-information/how-gas-is-measured

[–] [email protected] 1 points 5 hours ago

I guess it wouldn't make sense to measure energy used by gas-powered appliances in Wh since they're not rated in Watts. Still, measuring volume and then converting to energy seems unnecessarily complicated.

[–] Joelk111 2 points 10 hours ago

Thanks for the explainer, that makes a lot of sense.

[–] [email protected] -1 points 15 hours ago (1 children)

At least in the US, the electric company charges in kWh, computer parts are advertised in terms of watts, and batteries tend to be in amp hours, which is easy to convert to watt hours.

Joules just overcomplicates things.

[–] [email protected] 2 points 7 hours ago* (last edited 7 hours ago) (1 children)

Wow, the US education system must be improved. 1J is 3600Wh. That's literraly the same thing, but the name is less confusing because people tend to confuse W and Wh

[–] [email protected] 1 points 9 minutes ago

Do you regularly divide/multiply by 3600? That's not something I typically do in my head, and there's no reason to do it when everything is denominated in watts. What exactly is the benefit?