Bach Aaron J E, Palutikof Jean P, Tonmoy Fahim N, Smallcombe James W, Rutherford Shannon, Joarder Ashikur R, Hossain Monir, Jay Ollie
National Climate Change Adaptation Research Facility (NCCARF), Griffith University, Gold Coast, QLD, Australia.
Cities Research Institute, Griffith University, Gold Coast, QLD, Australia.
Energy Build. 2023 May;286:112954. doi: 10.1016/j.enbuild.2023.112954.
The ready-made garment industry is critical to the Bangladesh economy. There is an urgent need to improve current working conditions and build capacity for heat mitigation as conditions worsen due to climate change. We modelled a typical, mid-sized, non-air-conditioned factory in Bangladesh and simulated how the indoor thermal environment is altered by four rooftop retrofits (1. extensive green roof, 2. rooftop shading, 3. white cool roof, 4. insulated white cool roof) on present-day and future decades under different climate scenarios. Simulations showed that all strategies reduce indoor air temperatures by around 2 °C on average and reduce the number of present-day annual work-hours during which wetbulb globe temperature exceeds the standardised limits for moderate work rates by up to 603 h - the equivalent of 75 (8 h) working days per year. By 2050 under a high-emissions scenario, indoor conditions with a rooftop intervention are comparable to present-day conditions. To reduce the growing need for carbon-intensive air-conditioning, sustainable heat mitigation strategies need to be incorporated into a wider range of solutions at the individual, building, and urban level. The results presented here have implications for factory planning and retrofit design, and may inform policies targeting worker health, well-being, and productivity.
成衣业对孟加拉国经济至关重要。由于气候变化导致情况恶化，迫切需要改善当前的工作条件并增强热缓解能力。我们对孟加拉国一家典型的中型非空调工厂进行了建模，并模拟了在不同气候情景下，当前及未来几十年四种屋顶改造措施（1. 大面积绿色屋顶；2. 屋顶遮阳；3. 白色凉爽屋顶；4. 隔热白色凉爽屋顶）如何改变室内热环境。模拟结果表明，所有策略平均可使室内空气温度降低约2°C，并使当前每年湿球黑球温度超过适度工作率标准化限值的工作小时数减少多达603小时——相当于每年75个（8小时）工作日。到2050年，在高排放情景下，采用屋顶干预措施后的室内条件与当前条件相当。为减少对碳密集型空调日益增长的需求，可持续的热缓解策略需要纳入个人、建筑和城市层面更广泛的解决方案中。此处呈现的结果对工厂规划和改造设计具有启示意义，并可能为针对工人健康、福祉和生产力的政策提供参考。
