Article, 2024

Energy consumption of hollow bucket walls filled with different insulation materials

Applied Thermal Engineering, ISSN 1359-4311, 1873-5606, Volume 250, Page 123427, 10.1016/j.applthermaleng.2024.123427

Contributors

Diao, Rong Dan 0009-0003-3309-5683 (Corresponding author) [1] [2] [3] Cao, Yinqiu [2] [3] Sun, Lin Zhu 0009-0005-9250-5616 [2] [3] Li, Jiangen [2] [3] Michel, Mushagalusa Murhambo [2] [3] Xu, Chen [2] [3] Yang, Fang [2] [3]

Affiliations

  1. [1] Aalborg University
    2. [NORA names: AAU Aalborg University; University; Denmark; Europe, EU; Nordic; OECD];
  2. [2] Wenzhou Engineering Technical Research Center on Building Energy Conservation and Emission Reduction ＆ Diaster Prevention and Mitigation
    3. [NORA names: China; Asia, East];
  3. [3] Wenzhou University
    4. [NORA names: China; Asia, East]

Abstract

In both chinese villages and towns buildings, the use of Hollow bucket walls are widely observed, but the effectiveness of filling them with insulation material has not been clarified. In this study, the effects of different insulation materials on the energy consumption of hollow bucket walls have been analyzed. The heat flowmeter method has been used to measure the heat transfer coefficients of the walls, which has been compared with theoretically calculated values. Meanwhile, the building Energy Consumption of different insulation enclosures was numerically modeled. The results showed that the heat transfer coefficient of the Dahlen brick cavity wall without infill material was the largest at 1.86 W/(m2·K). The number of heat transfers in the silt terra cotta air hopper wall in the enclosure with infill material was 0.89 W/(m2·K). The heat transfer coefficient of the expanded perlite cavity wall was 0.88 W/(m2·K). The heat transfer coefficient of the rice husk air hopper wall was 0.8 W/(m2·K). It can be seen that the walls of rice husks have the lowest heat transfer coefficient and the best thermal insulation. The measured heat transfer coefficients of the air hopper walls are greater than the theoretically calculated heat transfer coefficients by comparative analysis. The average bias error is only 3 %. In addition, numerical simulations of the envelope with different insulation materials showed that the internal surface temperature of the rice husk-filled wall was 21.89 ℃ among the walls tested. The internal surface conduction heat transfer rate was 58.53 W. The total heat loss energy for regional infiltration was 1.056 MJ. All three values are the lowest. However, the total heat gain energy for regional infiltration is up to 0.231 MJ, which confirms the experimental results. These results can be used to develop design specifications for hollow hopper walls with good insulation properties and demonstrate how waste materials such as rice husks and straws can be reused in rural areas.

Keywords

Chinese villages, Dahlen, air, analysis, area, average bias error, bias error, brick cavity wall, bucket wall, building, cavity wall, coefficient, comparative analysis, conduction heat transfer rate, consumption, design, design specifications, effect, enclosure, energy, energy consumption, envelope, error, experimental results, flowmeter method, gain energy, heat, heat transfer, heat transfer coefficient, heat transfer rate, hopper walls, husk, infill, infill material, infiltration, insulated enclosure, insulation, insulation materials, insulation properties, internal surface temperature, loss energy, low heat transfer coefficient, materials, measured heat transfer coefficients, method, numerical simulations, properties, rate, regional infiltration, results, rice, rice husk, rural areas, silt, simulation, specificity, straw, study, surface temperature, temperature, thermal insulation, town, town building, transfer, transfer coefficient, transfer rate, values, village, wall, waste, waste materials

Funders

  • National Natural Science Foundation of China
  • Wenzhou Municipal Sci-Tech Bureau

Data Provider: Digital Science

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