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Joshi, Atul
- Application of Unit Heat Integration in VFY Unit-A Case Study
Authors
1 Corporate Technical & Energy services, Aditya Birla Science & Tech Pvt Ltd, Navi Mumbai, 410208, IN
Source
Indian Journal of Energy, Vol 4, No 2 (2015), Pagination: 1-9Abstract
Background/Objectives: Energy efficient technology selection for all the individual in site does not guarantee optimized energy consumption for total site. Synergy exist between two different technologies for heat recovery. Application of inter unit Pinch analysis opens up opportunities for step reduction in Energy consumption.
Methods/Statistical analysis: Viscose Filament Yarn process was chosen to demonstrate application of inter unit pinch analysis. Chlor-alkali units are integral part of viscose process units. Significant steam is consumed in viscose units for spin bath at 50 deg C. High grade steam at 150 deg C is normally used in graphite exchanger. There is general belief that graphite exchanger is expensive and use of low grade heat like hot water is not economical as area of exchanger increased and there by cost. Scheme was developed to compare spin bath heating using steam and hot water. Aspen EDR was used to size the exchangers. Costing for the scheme was done for analysis of project economics.
Findings:
• Inter unit use of low grade unit for spin bath heating is an economically viable option. Payback is very attractive at 8 months though the capex is very high. Leverage is in the operating cost i.e. Steam Vs Waste heat.
• Heat transfer co-efficient in hot water heating decreases only by 16% with respect to steam heating. Hence hot water availability at 125 °C would mean an increase in area only by 50% and not multifold.
• Reduction in water make up to cooling tower is additional benefit.
Improvements/Applications: Inter unit pinch analysis is applicable for any site having 2 or more process units.
Keywords
Heat Integration, Spin Bath, Low Grade Heat Recovery, Pinch Analysis, Energy Reduction.Full Text
- Project Based Learning as an Active Learning Strategy in Engineering Education
Authors
1 MKSSS’s Cummins College of Engineering for Women, Pune 52, IN
Source
Journal of Engineering Education Transformations, Vol 36, No SP (2022), Pagination: 18-24Abstract
Things done are better remembered than things that are just heard or seen. In Project based learning pedagogy, the course content is delivered by assigning problem statements pertaining to real life situations to a group of students. For the assessment and evaluation of the course, the students have to give a presentation and a demo of the solution for the given problem at the end of course. So the students get sufficient time to work on the solution for the given problem. However, the work of the students is regularly monitored which helps in refining the proposed solution, looking for alternative solutions etc. In the process of solving these problem statements, the students apply the knowledge they have gained in various courses they have undertaken. In this process, the problem solving skills and employability of the students is greatly enhanced. In this paper, the authors have implemented project based learning pedagogy for two third year courses in Instrumentation Engineering Curriculum. The paper describes the aptness of this teaching pedagogy for the selected courses, activity planning, formulation of problem statements, progress reviews, and feedback. Through this activity, the authors found out that technical and non-technical skills of the students were greatly enhanced. Technical skills like, Problem formulation, System designing, etc are developed among the students. Effective communication, working in a team, developing a multidisciplinary approach, finance related planning are some of the non-technical skills found to be cultivated among the students. This ultimately develops life learning ability among the students.Keywords
Employability, Lifelong Learning, Outcome Based Education, Project Based Learning, Skill Enhancement.
References
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