A techno-economic evaluation of low-grade excess heat recovery and liquid desiccant-based temperature and humidity control in automotive paint shops
A techno-economic evaluation of low-grade excess heat recovery and liquid desiccant-based temperature and humidity control in automotive paint shops
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DOI：
10.1016/j.enconman.2022.115654
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发表时间：
2022-04-27
影响因子：
10.4
通讯作者：
Roskilly, Anthony Paul
中科院分区：
文献类型：
--
作者：
Giampieri, Alessandro;Ma, Zhiwei;Roskilly, Anthony Paul
喷漆车间是汽车制造厂中能源消耗最高的工序，为喷漆室提供空气的空气管理系统消耗的能源最多。这些系统对于温度和湿度控制至关重要，它们通过防止油漆缺陷来确保最终产品的质量，从而避免返工的额外成本。对于水性涂料尤其如此，其中蒸发和成膜过程受到周围空气的温度和湿度的影响。本研究的目的是探讨液体除湿技术纳入到传统的空气管理系统的油漆车间在不同的气候条件下运行，这提出了新奇的研究。该技术很有前途，因为它可以调节湿度，根据需求充当除湿器或加湿器，并以热化学形式储存能量。此外，在油漆车间中可用的废热源可用于液体干燥剂溶液的再生。该新工艺的技术经济评估表明，所提出的系统可以将供应空气的温度和湿度控制在最佳涂装所需的范围内，并在寒冷和炎热/潮湿气候下实现显著的节能，与常规操作相比，能源成本分别降低44.4%和33.6%，投资回收期分别为6.15年和5.74年，使用氯化钙作为干燥剂溶液。灵敏度分析研究了能源和碳价格对系统性能的影响。它的结论是，液体干燥剂技术集成到传统的空气管理系统的喷漆室有一个巨大的潜力，以提高能源效率的汽车喷漆。
The paint shop is the most energy-intensive process in an automotive manufacturing plant, with air management systems that supply air to paint booths consuming the most energy. These systems are crucial for temperature and humidity control, in which they ensure the quality of the final product by preventing paint defects and thus avoid the additional cost of reworking. This is especially true for water-based paints, in which evaporation and film formation processes are influenced by the temperature and humidity of the surrounding air. This study aims to investigate the incorporation of liquid desiccant technology into a conventional air management system for paint shops operating in different climates, which presents the novelty of the study. The technology is promising because it can regulate humidity, act as a dehumidifier or humidifier depending on the demand and stores energy in a thermo-chemical form. In addition, waste heat sources available in the paint shop can be used for the regeneration of the liquid desiccant solution. The techno-economic evaluation of this novel process indicates that the proposed system can control the temperature and humidity of the supply air within the range required for optimal painting and achieve significant energy savings in both cold and hot/humid climates, with a reduction of 44.4% and 33.6% of the energy cost compared to the conventional operation and a payback period of 6.15 and 5.74 years respectively, using calcium chloride as the desiccant solution. The sensitivity analysis investigates the effect of the energy and carbon price on the performance of the system. It is concluded that the integration of liquid desiccant technology into conventional air management systems for paint booths has a huge potential to increase the energy-efficiency of automotive painting.