Archive:000/Walkability/New construction - Revision history

Elie: Elie moved page Walkability/New construction to Archive:000/Walkability/New construction without leaving a redirect: Huge_refactor

2024-10-26T20:30:15Z

Elie moved page Walkability/New construction to Archive:000/Walkability/New construction without leaving a redirect: Huge_refactor

← Older revision	Revision as of 16:30, 26 October 2024
(No difference)

Elie at 18:27, 5 November 2023

2023-11-05T18:27:08Z

← Older revision		Revision as of 14:27, 5 November 2023
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	If [[walkability]] ~~was~~ achieved by building brand-new neighborhoods, how long would it take to "break even" considering the carbon emissions of ~~building~~ the ~~new homes/buildings~~?		If [[walkability]] is achieved by building brand-new neighborhoods, how long would it take to "break even" considering the carbon emissions of the construction & materials?

	Simplified model:		==Simplified model==
	* consider the carbon footprint of making a new building, per person living there.		* consider the carbon footprint of making a new building, per person living there.
	* assume a full extreme lifestyle change: people go from "USA average" amount of driving, to zero driving.		* assume a full extreme lifestyle change: people go from "USA average" amount of driving, to zero driving.
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	</tab>		</tab>

	The real-life figure might be higher because...		The real-life figure might be higher, because...
	* can't really expect a full change to ''zero'' driving, just a lot less than before		* can't really expect a full change to ''zero'' driving, just a lot less than before
	* the calculation didn't include interior furnishings of the building, as far as I know		* the calculation didn't include interior furnishings of the building, as far as I know
	~~Or it~~ might be lower because...		The real-life figure might be lower, because...
	* the footprint of heating the new place would probably be lower than the old place		* the footprint of heating the new place{{x\|i.e. an apartment or condo in a multi-unit residential building}} would probably be lower than the old place{{x\|i.e. a single-detached suburban home}}
			* less construction in other ways (especially road maintenance)

	In any case, the carbon payoff of new construction could be worth it if there's no better option for [[Walkability/Existing housing]].		In any case, the carbon payoff of new construction could be worth it if there's no better option for [[Walkability/Existing housing]].

	<!-- TALK: should i try to find a different case study that deals with per capita (or total emissions and total number of residents) instead of guesstimating floor space per person -->		<!-- TALK: should i try to find a different case study that deals with per capita (or total emissions and total number of residents) instead of guesstimating floor space per person -->

Elie at 18:14, 5 November 2023

2023-11-05T18:14:53Z

@@ Line 1: / Line 1: @@
 {{dp
 |<nowiki>building.construction_ghg_by_floor_area</nowiki>
@@ Line 59: / Line 66: @@
 |years (average_us_vehicle.fuel_usage * gasoline.ghg_by_energy * usa.registered_vehicles / usa.population)
 }}
-<!-- TALK: i should try to find a different case study that deals with per capita (or total emissions and total number of residents) instead of guesstimating floor space per person -->
+<!-- TALK: should i try to find a different case study that deals with per capita (or total emissions and total number of residents) instead of guesstimating floor space per person -->

Elie at 05:00, 4 November 2023

2023-11-04T05:00:09Z

← Older revision		Revision as of 01:00, 4 November 2023
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	\|<nowiki>530.43 kg/m^2</nowiki>		\|<nowiki>530.43 kg/m^2</nowiki>
	\|<nowiki>CO2 emissions involved in making a building, per unit of floor area</nowiki>		\|<nowiki>CO2 emissions involved in making a building, per unit of floor area</nowiki>
	\|<nowiki>Includes all materials and construction processes.</nowiki><br /><nowiki>		\|<nowiki>Includes all materials and construction processes.</nowiki><br /><small>But probably doesn't include furnishings.</small><br /><nowiki>
	</nowiki><br /><nowiki>		</nowiki><br /><nowiki>
	Source:</nowiki><br /><nowiki>		Source:</nowiki><br /><nowiki>

Elie at 04:52, 4 November 2023

2023-11-04T04:52:37Z

← Older revision		Revision as of 00:52, 4 November 2023
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	{{dp		{{dp
	\|home_space		\|home_space
	\|~~350~~ square(feet) per person		\|400 square(feet) per person
	}}		}}
	{{dp		{{dp
	\|private_fraction_of_building		\|private_fraction_of_building
	\|65%		\|70%
	\|Percent of the building's floorspace that is private living space		\|Percent of the building's floorspace that is private living space
	\|The rest is hallways, stairwells, and common rooms.		\|The rest is hallways, stairwells, and common rooms.

Elie: Created page with "{{dp |building.construction_ghg_by_floor_area |530.43 kg/m^2 |CO2 emissions involved in making a building, per unit of floor area |Includes all materials and construction processes.

Source:
Case Study on Carbon Footprint Life-Cycle Assessment for Construction Delivery Stage in China
by Xiaojuan Li, Chen Wang, Mukhtar A. K..."

2023-11-04T04:43:06Z

Created page with "{{dp |<nowiki>building.construction_ghg_by_floor_area</nowiki> |<nowiki>530.43 kg/m^2</nowiki> |<nowiki>CO2 emissions involved in making a building, per unit of floor area</nowiki> |<nowiki>Includes all materials and construction processes.</nowiki> <nowiki> </nowiki> <nowiki> Source:</nowiki> <nowiki> Case Study on Carbon Footprint Life-Cycle Assessment for Construction Delivery Stage in China</nowiki> <nowiki> by Xiaojuan Li, Chen Wang, Mukhtar A. K..."

New page

{{dp
|<nowiki>building.construction_ghg_by_floor_area</nowiki>
|<nowiki>530.43 kg/m^2</nowiki>
|<nowiki>CO2 emissions involved in making a building, per unit of floor area</nowiki>
|<nowiki>Includes all materials and construction processes.</nowiki> <nowiki>
</nowiki> <nowiki>
Source:</nowiki> <nowiki>
Case Study on Carbon Footprint Life-Cycle Assessment for Construction Delivery Stage in China</nowiki> <nowiki>
by Xiaojuan Li, Chen Wang, Mukhtar A. Kassem, Shu-Yi Wu, and Tai-Bing Wei</nowiki> <nowiki>
https://www.mdpi.com/2071-1050/14/9/5180</nowiki> <nowiki>
Sustainability 2022, 14(9), 5180; https://doi.org/10.3390/su14095180</nowiki> <nowiki>
</nowiki> <nowiki>
Quote: "...the area carbon-emission intensity is between 400 and 800 kgCO2/m^2, and the average area carbon emission of the building is 647.99 kgCO2/m^2 compared to other research results for emissions around 412.87 kgCO2/m^2"</nowiki> <nowiki>
</nowiki> <nowiki>
So I decided to take the midpoint between both figures.</nowiki>
}}
{{dp
|<nowiki>gasoline.ghg_by_energy</nowiki>
|<nowiki>71.30 kg / million btu</nowiki>
|<nowiki>CO2 emissions of burning gasoline</nowiki>
|<nowiki>https://www.eia.gov/environment/emissions/co2_vol_mass.php</nowiki>
}}
{{dp
|<nowiki>average_us_vehicle.fuel_usage</nowiki>
|<nowiki>489 gallons gasoline/year</nowiki>
|<nowiki>The average American vehicle uses this much gasoline (measured in energy units)</nowiki>
|<nowiki>Top Numbers Driving America's Gasoline Demand</nowiki> <nowiki>
https://www.api.org/news-policy-and-issues/blog/2022/05/26/top-numbers-driving-americas-gasoline-demand</nowiki> <nowiki>
</nowiki> <nowiki>
Note: Since the statistic is mentioned specifically in relation to gasoline, we can '''probably''' assume that it excludes diesel-powered vehicles such as semi trucks. But the website doesn't specify that, so it's anyone's guess.</nowiki>
}}
{{dp
|<nowiki>usa.registered_vehicles</nowiki>
|<nowiki>275.9 million</nowiki>
|<nowiki>Number of registered vehicles in the USA</nowiki>
|<nowiki>Top Numbers Driving America's Gasoline Demand</nowiki> <nowiki>
https://www.api.org/news-policy-and-issues/blog/2022/05/26/top-numbers-driving-americas-gasoline-demand</nowiki>
}}
{{dp
|<nowiki>usa.population</nowiki>
|<nowiki>334416477 people</nowiki>
|<nowiki>Number of people living in the USA</nowiki>
|<nowiki>United States Population (Live) - Worldometer</nowiki> <nowiki>
www.worldometers.info › world-population › us-population</nowiki> <nowiki>
Last updated April 7 2022</nowiki>
}}
{{dp
|home_space
|350 square(feet) per person
}}
{{dp
|private_fraction_of_building
|65%
|Percent of the building's floorspace that is private living space
|The rest is hallways, stairwells, and common rooms.
}}
{{calc
|building.construction_ghg_by_floor_area * home_space / private_fraction_of_building
|years (average_us_vehicle.fuel_usage * gasoline.ghg_by_energy * usa.registered_vehicles / usa.population)
}}