[Investigative Submission]: Embodied emissions for laptops and desktops

[srini1978]

Contact Details

srini1978@gmail.com

Data request?

Manufacturing emissions or embodied emissions of different laptop types and desktop types. This is required for SCI calculation on client side devices for eShoppen case study

Outline any further information requirements

No response

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[mrchrisadams]

Hi @srini1978, I'd suggest referring to the numbers in Boavista's dataset.

It's the best data I can find, and there's a clear submission process as well as place to ask further questions:

https://github.com/Boavizta/environmental-footprint-data/

There is an accessible front end here, to allow you to select various laptop and desktop types.

https://dataviz.boavizta.org/

This data is liberally licensed and it's clear where the embodied emissions numbers have come from. they also support 'amortising' the embodied emissions over different numbers of years.

If you're happy with this, would you mind closing the issue?

[da-ekchajzer]

Hello all,

Here is what we have at Boavizta

Data from http://dataviz.boavizta.org are aggregated from manufacturer declarations. Most of the data come from PAIA a methodology based on statistical analysis. From our investigation the impacts factors differ significantly with other database (private) that are known of better quality. This is still suppositions since the access to the data and methodology are restricted.

These data should be used with precaution. For instance, it won't make much sens to use it to characterize the emission of a specific model or brand. We recommend using it as order of magnitude (through the selection filters by type of equipment for instance).

Another approach could be to extrapolate a medium embodied emission from global analysis.

For instance, you could extrapolate from this study the impacts of OTHER phases than usage (transport, manufacture, end of life) for different type of and user devices (laptop, desktop, monitor, …). See Table 24.

feel free if you need clarification

[srini1978]

@mrchrisadams @da-ekchajzer The case study that i used , had a Dell laptop Latitude 7520 and there seems to be a match with the embodied emissions i used https://i.dell.com/sites/content/corporate/corp-comm/en/Documents/dell-laptop-carbon-footprint-whitepaper.pdf and the value provided by Boasvita and hece I think we can close this issue @DanniBradu .

However had a question to you @da-ekchajzer How are you able to differentiate the use phase . For e.g what does 34kgCo2eq mean here for use phase ?

[mrchrisadams]

hi @srini1978 can I check if I understand your question correctly?

what does 34kgCo2eq mean here for use phase ?

You're asking in terms of what the typical usage profile is for this to arrive at this use phase figure of 34kg of CO2?

i.e. 40 hours a week of use at 40w per hour of use, for 40 weeks of the year, etc

So 40 hrs 40 watts 40 weeks = 64000 watt hours, or 64 kilowatt hours, at a say… 0.4kg of CO2 per kilowatt hour might give us 25.4 kilos of CO2eq.

Is that what you're asking?