Technoeconomic evaluations for energy efficient domestic low GWP refrigeration technologies

Author's Department

Mechanical Engineering Department

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Document Type

Research Article

Publication Title

International Journal of Refrigeration

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Domestic refrigeration appliances are ubiquitous consuming roughly 14% of the global residential electrical consumption. It is estimated that the global installed stock of domestic refrigerators is between 2 and 2.3 billion units. Furthermore, domestic refrigerators employ high global warming potential (GWP) refrigerants (e.g., R-134a). The global goal to limit the global warming to 1.5°C requires rapid reduction in CO2 emissions and other greenhouse gases (GHGs). Transition towards cost-effective, efficient, and environmentally friendly refrigeration technologies is considered as one of the most effective measures to reduce GHG emissions. In this paper, we worked with 5 manufacturers in 4 developing countries to study energy efficiency (EE) design options and the associated incremental capital cost and incremental recurring cost (IRC). In our study, we have accounted for their product development capabilities, their productions volume, their relationship with original equipment manufacturers (OEMs), and the local product competition in their markets. Our detailed study showed that cost effective energy savings of 9.5 to 19.2% can be achieved while the maximum EE upgrades varied between 30.2 to 50%. Furthermore, the corresponding indirect emissions reduction varied by the local electricity production mix and the baseline technology. The cost-effective EE upgrades result in emission reduction of 65,145 to 612,959 metric tons of CO2eq while the maximum EE upgrades result in emission reduction of 157,675 to 1,077,005 metric tons of CO2eq.

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