{"id":{"repo_id":"uoit","oai_identifier":"oai:ontariotechu.scholaris.ca:10155/1912"},"canonical_url":"https://search.dev.ndltd.org/etd/uoit/oai:ontariotechu.scholaris.ca:10155/1912","repository":{"repo_id":"uoit","name":"Ontario Institute of Technology","base_url":"https://ontariotechu.scholaris.ca/server/oai/request"},"display":{"title":"Experimental investigation of building envelope and air source heat pumps in Canadian cold climate","abstract":"In Canada, more than 60% of residential energy is used for space heating, yet the adoption of air-source heat pumps (ASHPs) is slower compared to the global average despite their high efficiency and potential for building electrification. This slow adoption is partly due to the low efficiency of ASHPs in cold climates. This study investigates how extreme temperatures, wind, and solar conditions affect building envelope performance and the efficiency of commercial ASHPs. Experiments were conducted in controlled conditions using the full-scale climatic chamber and wind tunnel at Ontario Tech University. Results were analyzed to determine the heat transfer coefficient, heat loss parameters of the building, and COP of the ASHP. The findings reveal a strong correlation between a) the thermal performance of the building envelope and the ASHP efficiency, b) the effect of wind speed and the convective heat transfer coefficient, c) the solar irradiance and the thermal mass of the wall, and d) the ASHP efficiency with the thermal mass of the envelope.","abstract_html":"In Canada, more than 60% of residential energy is used for space heating, yet the adoption of air-source heat pumps (ASHPs) is slower compared to the global average despite their high efficiency and potential for building electrification. This slow adoption is partly due to the low efficiency of ASHPs in cold climates. This study investigates how extreme temperatures, wind, and solar conditions affect building envelope performance and the efficiency of commercial ASHPs. Experiments were conducted in controlled conditions using the full-scale climatic chamber and wind tunnel at Ontario Tech University. Results were analyzed to determine the heat transfer coefficient, heat loss parameters of the building, and COP of the ASHP. The findings reveal a strong correlation between a) the thermal performance of the building envelope and the ASHP efficiency, b) the effect of wind speed and the convective heat transfer coefficient, c) the solar irradiance and the thermal mass of the wall, and d) the ASHP efficiency with the thermal mass of the envelope.","abstract_has_math":false,"creators":["Jafri, Ahmed Raza"],"institution":"University of Ontario Institute of Technology","degree_name":"Master of Applied Science (MASc)","degree_level":null,"degree_discipline":"Mechanical Engineering","degree_department":null,"school":null,"contributors":[],"advisors":["Agelin Chaab, Martin","Hangan, Horia"],"committee_chairs":[],"committee_members":[],"year":2024,"date_issued":"2024-08-01","date_published":"2024-08-01","updated_at":"2026-07-24T05:35:38Z","subjects":[],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/10155/1912","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Agelin Chaab, Martin","Hangan, Horia"]},{"key":"dc:creator","label":"Author","values":["Jafri, Ahmed Raza"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-04-01T15:36:37Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2025-04-01T15:36:37Z"]},{"key":"dc:date.issued","label":"Date","values":["2024-08-01"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Mechanical Engineering"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Applied Science (MASc)"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Ontario Institute of Technology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/10155/1912"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["In Canada, more than 60% of residential energy is used for space heating, yet the adoption of air-source heat pumps (ASHPs) is slower compared to the global average despite their high efficiency and potential for building electrification. This slow adoption is partly due to the low efficiency of ASHPs in cold climates. This study investigates how extreme temperatures, wind, and solar conditions affect building envelope performance and the efficiency of commercial ASHPs. Experiments were conducted in controlled conditions using the full-scale climatic chamber and wind tunnel at Ontario Tech University. Results were analyzed to determine the heat transfer coefficient, heat loss parameters of the building, and COP of the ASHP. The findings reveal a strong correlation between a) the thermal performance of the building envelope and the ASHP efficiency, b) the effect of wind speed and the convective heat transfer coefficient, c) the solar irradiance and the thermal mass of the wall, and d) the ASHP efficiency with the thermal mass of the envelope."]},{"key":"dc:title","label":"Title","values":["Experimental investigation of building envelope and air source heat pumps in Canadian cold climate"]}]}],"canonical_facts":{"dc:contributor.advisor":["Agelin Chaab, Martin","Hangan, Horia"],"dc:creator":["Jafri, Ahmed Raza"],"dc:date.accessioned":["2025-04-01T15:36:37Z"],"dc:date.available":["2025-04-01T15:36:37Z"],"dc:date.issued":["2024-08-01"],"dc:description.abstract":["In Canada, more than 60% of residential energy is used for space heating, yet the adoption of air-source heat pumps (ASHPs) is slower compared to the global average despite their high efficiency and potential for building electrification. This slow adoption is partly due to the low efficiency of ASHPs in cold climates. This study investigates how extreme temperatures, wind, and solar conditions affect building envelope performance and the efficiency of commercial ASHPs. Experiments were conducted in controlled conditions using the full-scale climatic chamber and wind tunnel at Ontario Tech University. Results were analyzed to determine the heat transfer coefficient, heat loss parameters of the building, and COP of the ASHP. The findings reveal a strong correlation between a) the thermal performance of the building envelope and the ASHP efficiency, b) the effect of wind speed and the convective heat transfer coefficient, c) the solar irradiance and the thermal mass of the wall, and d) the ASHP efficiency with the thermal mass of the envelope."],"dc:identifier.uri":["https://hdl.handle.net/10155/1912"],"dc:language.iso":["en"],"dc:title":["Experimental investigation of building envelope and air source heat pumps in Canadian cold climate"],"dc:type":["Thesis"],"thesis:degree_discipline":["Mechanical Engineering"],"thesis:degree_name":["Master of Applied Science (MASc)"],"thesis:institution_name":["University of Ontario Institute of Technology"]},"updated_at":"2026-07-24T05:35:38Z"}