Abstract

Stenter machines are used widely in textile dyeing and printing houses for drying and heat setting of fabric. This is one of the most thermal energy-consuming equipment in the textile process. In this paper, the advanced energy model of the stenter machine is developed using primary mass and energy balance equations for ideal conditions as well as standard operating conditions, accounting for various energy losses to understand energy flow. To find out the scope for reduction in energy consumption, energy benchmarking is very important; compared with it, the appropriate energy consumption of a plant can be checked and changed. Furthermore, to eliminate problems such as life, process conditions, and quality of dyeing and printing houses considered during the study, unlike statistical energy benchmarking, in this paper, energy model-based benchmarking is proposed and applied for literature problems. Based on the data given in the literature for conveyor belt, stenter 1 and stenter 2, the specific energy consumption (SEC) for cotton is 4889, 3586, and 4304 kJ/kg of water evaporation, respectively, which is lower than the polywool fabric, having 5185 kJ/kg of water evaporation for another stenter machine. The energy efficiency index (EEI) of conveyor belt dryer, stenter 1, and stenter 2 are 1.56,1.18 and 1.34 for cotton, respectively, and for polywool with another stenter it is 1.92, indicating the polywool process is not energy efficient even polywool do not have bound moisture. Further, Energy flow analysis is carried out for the given stenter and fabric drying process, indicating the highest losses are in the exhaust process even after direct heat recovery by partial recirculation of exhaust gases. By analyzing the energy consumption of stenter machines through energy model based benchmarking and energy efficiency index presents the condition of process and machine from an energy perspective, and energy flow model gives the scope of the energy-saving potential. By using the developed model, the effect of change in atmospheric air temperature and humidity ratio due to season and geographic location on the performance of the stenter machine is investigated and found that there is a variation in performance up to 10% of the total energy required.

摘要

拉幅机广泛用于纺织印染厂对织物进行干燥和热定型。这是纺织过程中热能消耗最大的设备之一。在本文中，拉幅机的高级能量模型是使用理想条件和标准操作条件下的初级质量和能量平衡方程开发的，考虑到各种能量损失以了解能量流。要找出降低能耗的范围，能源对标非常重要；与之相比，可以检查和更改工厂的适当能源消耗。此外，为了消除研究中考虑的诸如寿命、工艺条件和印染厂质量等问题，与统计能源对标不同，在本文中，提出了基于能量模型的基准测试并将其应用于文献问题。根据文献中传送带、拉幅机 1 和拉幅机 2 的数据，棉花的单位能耗 (SEC) 分别为 4889、3586 和 4304 kJ/kg 的水分蒸发，低于聚毛织物，另一台拉幅机的水蒸发量为 5185 kJ/kg。输送带式烘干机、拉幅机1、拉幅机2的能效指数（EEI），棉布分别为1.56、1.18和1.34，而带另一台拉幅机的涤纶为1.92，说明涤纶工艺不节能，即使涤纶有没有结合水分。此外，对给定的拉幅机和织物干燥过程进行能量流分析，表明即使在通过废气的部分再循环直接回收热量之后，排气过程中的损失也最大。通过基于能源模型的对标分析拉幅机的能耗，能效指标从能源的角度呈现工艺和机器的状况，能量流模型给出了节能潜力的范围。通过使用开发的模型，研究了由于季节和地理位置引起的大气温度和湿度比变化对拉幅机性能的影响，发现性能变化高达所需总能量的 10% . 通过基于能源模型的对标分析拉幅机的能耗，能效指标从能源的角度呈现工艺和机器的状况，能量流模型给出了节能潜力的范围。通过使用开发的模型，研究了由于季节和地理位置引起的大气温度和湿度比变化对拉幅机性能的影响，发现性能变化高达所需总能量的 10% . 通过基于能源模型的对标分析拉幅机的能耗，能效指标从能源的角度呈现工艺和机器的状况，能量流模型给出了节能潜力的范围。通过使用开发的模型，研究了由于季节和地理位置引起的大气温度和湿度比变化对拉幅机性能的影响，发现性能变化高达所需总能量的 10% .