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<p>Globally, domestic refrigerators account for over 13% of the total energy consumption in residential buildings. The brazed plate water-cooled condenser (BPWCC) is compact in size and an attractive option to reduce the energy consumption of refrigerators using domestic water tanks. This study evaluated the performance of a household refrigerator with a secondary refrigerant calorimeter and BPWCC, using an appropriate experimental setup. Water storage tanks with capacities of 750&#xa0;l, 1000&#xa0;l, and 2000&#xa0;l supplied cooling water to BPWCC. The study evaluated how well the modified domestic refrigerator (MDR) worked with R134a and a blend of R290 and R600a (54.8:45.2), using 108&#xa0;g and 50&#xa0;g of charge, respectively. When the MDR was charged with the R290/R600a blend, its COP, exergy efficiency, per-day energy consumption, and total equivalent warming impact were 0.93–1.18, 24–24.8%, 1.28–1.4 kWh, and 5019, respectively. BPWCC’s exergy efficiency went up by 25–55% when the condensing temperature went down, and it used 11.5–27% less energy per day than air-cooled condensers. Besides reducing the cost rate by 32–37%, the modified system showed a payback period below 3&#xa0;years. However, to mature the proposed system, future research must focus on several issues related to the integration of the domestic water system with the BPWCC.</p>

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Energy-exergy and enviro-economic analysis of water-cooled brazed plate building–integrated condenser for cooling appliances in dwellings

  • 期刊论文

  • 发表日期：

    2025年1月25日

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  • Joseph Sekhar Santhappan,
  • Saji Raveendran Padmavathy,
  • Ahmed Said Ahmed Al-Shahri,
  • Murugan Paradesi Chockalingam,
  • Godwin Glivin

摘要

Globally, domestic refrigerators account for over 13% of the total energy consumption in residential buildings. The brazed plate water-cooled condenser (BPWCC) is compact in size and an attractive option to reduce the energy consumption of refrigerators using domestic water tanks. This study evaluated the performance of a household refrigerator with a secondary refrigerant calorimeter and BPWCC, using an appropriate experimental setup. Water storage tanks with capacities of 750 l, 1000 l, and 2000 l supplied cooling water to BPWCC. The study evaluated how well the modified domestic refrigerator (MDR) worked with R134a and a blend of R290 and R600a (54.8:45.2), using 108 g and 50 g of charge, respectively. When the MDR was charged with the R290/R600a blend, its COP, exergy efficiency, per-day energy consumption, and total equivalent warming impact were 0.93–1.18, 24–24.8%, 1.28–1.4 kWh, and 5019, respectively. BPWCC’s exergy efficiency went up by 25–55% when the condensing temperature went down, and it used 11.5–27% less energy per day than air-cooled condensers. Besides reducing the cost rate by 32–37%, the modified system showed a payback period below 3 years. However, to mature the proposed system, future research must focus on several issues related to the integration of the domestic water system with the BPWCC.