Mycket snack och för lite verkstad? Om urvattningen av ordet hållbarhet

Rehnberg, Hanna Sofia

doi:10.15626/hn.20224907

Cited by 1 publication

(1 citation statement)

References 2 publications

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“…The reduction of GHG emissions was calculated in 2020 to be one fifth of those in 1990 [30]. However, when evaluating the local DH company (Gävle Energi AB) in Gävle and its emissions, the levels were much lower, it was 4 g CO 2 eq/kWh in 2021 [31]. For evaluating the emissions of the electricity use, the values from the Swedish Environmental Research Institute are used which considers all types of energy resources as well as import and export factors.…”

Section: Dh Electricity Generation and Ghg Emissionsmentioning

confidence: 99%

Energy Performance Evaluation of Historical Building

2022

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Retrofitting measures in old buildings aimed at reducing energy usage have become important procedures meant to counteract the effects of climate change and greenhouse gas emissions. The aim of this study is to evaluate energy usage, thermal comfort, and CO2 emissions of an old building by changing parameters such as building orientation, shading systems, location, low energy film application, and alternative energy supply in the form of a geothermal heat pump. When evaluating the buildings in terms of geographical location with or without applying the low energy film, the results show that the city of Gävle in Sweden requires the most heating energy, 150.3 kWh/m2∙year (B0) compared to Jakarta (L0), which requires 23.8 kWh/m2∙year. When examining the thermal comfort, cases B4 and L4 demonstrate the best results in their respective categories (B0–B4 are cases without low energy film and L0–L4 are cases with applied low energy film). The results for the CO2 emissions levels for B0–B4 and L0–L4 indicate that B4 has the highest value, 400 kg CO2 eq/year higher than B0, and L1 has the lowest value, 731 kg CO2 eq/year lower than B0. The economic feasibility study illustrates that the installation of a geothermal heat pump with at least a coefficient of performance of 4.0 leads to a shorter payback period than solely applying LEF.

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Section: Dh Electricity Generation and Ghg Emissionsmentioning

confidence: 99%