CEDM student Jihoon Min won the 2nd place in the International Symposium on Sustainable Systems and Technology (ISSST) with a paper on “Assessing Regional Differences in Lighting Heat Replacement Effects in Residential Buildings in the United States”.
Title: Assessing Regional Differences in Lighting Heat Replacement Effects in Residential Buildings in the United States, by Jihoon Min, Inês Azevedo and Pekka Hakkarainen. Abstract: Incandescent bulbs release up to 95 percent of input energy as heat, impacting the overall building energy consumption: replacing them increases demands for heating service that needs to be provided by the heating systems and decreases demands for cooling service that needs to be provided by the cooling systems. This work investigates the net energy consumption, CO2e emissions, and savings in energy bills for single-family detached houses across the U.S. as one moves towards more efficient lighting systems. In some regions, these heating and cooling effects from more efficient lighting can undermine up to 40 percent of originally intended primary energy savings, erode anticipated carbon savings completely, or lead to 30 percent less household monetary savings than intended. The size of the effect depends on regional factors such as climate, technologies used for heating and cooling, electricity fuel mix, emissions factors, and electricity prices. However, we also find that for moderate lighting efficiency interventions, the overall effect is small in magnitude, corresponding at most to 1 percent of either total emissions or of energy consumption by a house.