Assessment of Energy Performance of Domestic Lights and Refrigerators in Sub-Sahara African Countries: A Case of Tanzania

Joackim George Kajigili; Sosthenes Karugaba; Mashauri Adam Kusekwa; Pius Victor Chombo; Gerutu Bosinge Gerutu; Kenedy Aliila Greyson

doi:10.37284/eaje.8.1.2636

Joackim George Kajigili Tanzania Bureau of Standards
Sosthenes Karugaba Dar es Salaam Institute of Technology
Mashauri Adam Kusekwa Dar es Salaam Institute of Technology
Pius Victor Chombo Dar es Salaam Institute of Technology
Gerutu Bosinge Gerutu Dar es Salaam Institute of Technology
Kenedy Aliila Greyson Dar es Salaam Institute of Technology

DOI: https://doi.org/10.37284/eaje.8.1.2636

Keywords: Luminous Efficacy, Energy Efficiency, Energy Consumption, Lights, Refrigerators

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Abstract

With the extensive potential for an increase in greenhouse gas emissions over the next few decades, Sub-Saharan African (SSA) countries need to focus on the energy performance of their domestic appliances. This study assesses the energy performance of domestic lights and refrigerators used in SSA countries, especially in Tanzania. The two key domestic appliances namely, lights and refrigerators were experimented. Four brands of 3, 5, 7, 9, 12, and 15 W white LED lights were tested at 24 C, while four brands of refrigerators with capacities of 205 L, 234 L, 184 L, and 225 L + 69 L were experimented. In light, the energy performance was assessed in terms of luminous efficacy () and energy efficiency (EEFLIGHTING). The findings revealed that the 3, 5, 7, 9, 12, and 15 W white LEDs could attain an average  of 86.1, 92.7, 102.9, 89.5, 86.2, and 96.9, respectively. Contrary, the EEFLIGHTING was found to be 123, 104, 115.3, 70.8, 72.0, and 86.0%. The analysis showed that there exist large deviations in  and EEFLIGHTING which cause the lights to consume more energy while producing low brightness. The 205 L and 234 L refrigerators consumed approximately 428 and 486 kWh/year; and 290 and 236 kWh/year at 24 and 27 C with opening activities. In the 184 L and 225 L + 69 L refrigerators, the annual energy consumption reached approximately 235 and 264 kWh/year; and 670 and 749 kWh/year at 24 and 27 C with opening activities. The opening activities in refrigerators increase energy use by its factor while the change in location temperature increases the daily and annual energy use (from 24 to 27 C) by approximately 12%. These findings are critical for understanding the energy use of residential appliances in relation to energy consumption per capita in SSA, as well as developing energy efficiency strategies to boost market adoption

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References

African Union. (2024). African Energy Efficiency Programme. https://au-afrec.org/energy-efficiency-programme.

Allouhi, A., El Fouih, Y., Kousksou, T., Jamil, A., Zeraouli, Y., & Mourad, Y. (2015). Energy consumption and efficiency in buildings: current status and future trends. Journal of Cleaner Production, 109, 118-130.

Baldini, M., Trivella, A., & Wente, J. W. (2018). The impact of socioeconomic and behavioural factors for purchasing energy efficient household appliances: A case study for Denmark. Energy policy, 120, 503-513.

Cardoso, R.B., Nogueira, L.A.H., and Haddad, J. (2010). Economic feasibility for acquisition of efficient refrigerators in Brazil. Applied Energy, 87(1), 28-37

Chunekar, A. (2014). Standards and Labeling program for refrigerators: Comparing India with others. Energy Policy 65 (2014) 626–630

Cialani, C. and Perman, K. (2022). Policy instruments to improve energy efficiency in buildings Policy instruments to improve energy efficiency in buildings. https://www.diva-portal.org/smash/get/diva2:789450/FULLTEXT01.pdf

City Population. (2023). Tanzania: Regions and Cities. https://www.citypopulation.de/en/ Tanzania/cities/

Damigos, D., Kontogianni, A., Tourkolias, C., & Skourtos, M. (2020). Behind the scenes: Why are energy efficient home appliances such a hard sell? Resources, Conservation and Recycling, 158, 104761.

Environmental and Energy Study Institute. (2017). Energy Efficiency Standards for Appliances, Lighting and Equipment (2017). https://www.eesi.org/papers/view/fact-sheet-energy-efficiency-standards-for-appliances-lighting-and-equipmen

Gil-Alana, L.A., Mudiba, R., and Zerbo, E. (2021). GDP per capita IN SUB-SAHARAN Africa: A time series approach using long memory. International Review of Economics & Finance, 72, 175-190

Guo, F., Pachauri, S., & Cofala, J. (2017). Cost-effective subsidy incentives for room air conditioners in China: An analysis based on a McFadden-type discrete choice model. Energy policy, 110, 375-385.

Guo, S., Yan, D., Hu, S., & Zhang, Y. (2021). Modelling building energy consumption in China under different future scenarios. Energy, 214, 119063.

Hosseini, S.H., Tsolakis, A., Alagumalai, A., Mahian, O., Lam, S.S., Pan, J., Peng, W., Tabatabaei, M. and Aghbashlo, M. (2023). Use of hydrogen in dual-fuel diesel engines. Progress in Energy and Combustion Science, 98, 101100. https://doi.org/10.1016/j.pecs. 2023.101100

IEA. (2023). Boosting Efficiency: Delivering affordability, security and jobs in Latin America. https://iea.blob.core.windows.net/assets/c8972f43-55af-4368-83a6-865f2d17b461/Boostingefficiency_Deliveringaffordability%2CsecurityandjobsinLatinAmerica.pdf

IEA50. (2023). Buildings. https://www.iea.org/energy-system/buildings

IEA50. (2024). Energy Sub-Saharan Africa. https://www.iea.org/programmes/energy-sub-saharan-africa

Kalua, A. (2020). Urban residential building energy consumption by end-use in Malawi. Buildings, 10(2), 31.

Li, Z., Wang, C., and Liu, Y. (2023). A dataset on energy efficiency grade of white goods in mainland China at regional and household levels. Scientific Data, 10, 445

Ma, M., Cai, W., & Wu, Y. (2019). China Act on the energy efficiency of civil buildings (2008): A decade review. Science of The Total Environment, 651, 42-60.

Meier, A. (1995). Refrigerator energy use in the laboratory and in the field. Energy and Buildings 22 (1995) 233-243

Nie, H., Zhou, T., Lu, H., Zhang, S. (2021). Evaluation of the efficiency of Chinese energy-saving household appliance subsidy policy: An economic benefit perspective. Energy Policy, 149, 112059

Parikh, K. S., & Parikh, J. K. (2016). Realizing potential savings of energy and emissions from efficient household appliances in India. Energy Policy, 97, 102-111.

Santamouris, M., & Vasilakopoulou, K. (2021). Present and future energy consumption of buildings: Challenges and opportunities towards decarbonisation. e-Prime-Advances in Electrical Engineering, Electronics and Energy, 1, 100002.

Schleich, J. (2019). Energy-efficient technology adoption in low-income households in the European Union–What is the evidence? Energy Policy, 125, 196-206.

Statista. (2024). Net electricity consumption worldwide in select years from 1980 to 2022. https://www.statista.com/statistics/280704/world-power-consumption/

The Oxford Institute for Energy Studies. (2024). Energy efficiency. https://chineseclimate policy.oxfordenergy.org/book-content/domestic-policies/energy-efficiency/

USAID. (2022). Energy- Efficiency Opportunities in Sub-Saharan Africa: Scaling Up Renewable Energy (SURE). https://pdf.usaid.gov/pdf_docs/PA00ZJFN.pdf

Wang, B., Deng, N., Liu, X., Sun, Q., & Wang, Z. (2021). Effect of Energy Efficiency Labels on Household Appliance Choice in China: Sustainable Consumption or Irrational Intertemporal Choice? Resources, Conservation and Recycling, 169, 105458.

Worldometer. (2024). African Countries by Population (2024). https://www.worldometers.info /population/countries-in-Africa-by-population/

Xu, X., & Chen, C. F. (2019). Energy efficiency and energy justice for US low-income households: An analysis of multifaceted challenges and potential. Energy Policy, 128, 763-774.