مقاله Power generation from waste heat in a food processing application : تی پی بین

خلاصه مقاله

In this paper, the potential of recovering waste heat from the fryer section and exhaust stream sent to the stack of a typical potato crisps or chips manufacturing plant and using the heat to drive an Organic Rankine Cycle (ORC) system for power generation has been presented. Five different ORC system Options (A, B, C, D and E) were considered. The first two options (A and B) make use of the waste heat from the foul gas and exhaust to stack respectively for power generation using a single ORC system each while the third option (option C) makes use of a novel dual heat source single ORC system where the low temperature waste heat from the foul gas is used to provide preheating and the high temperature waste from the exhaust to the stack used to provide the evaporation. Option D also shows a dual heat source ORC system where the high temperature waste heat to the exhaust stack is used to provide the preheating while the lower temperature foul gas is used for the evaporation (reverse of option C in terms of waste heat usage) while option E makes use of a reheat cycle where the waste heat from the foul gas is used to provide the reheating of the working fluid exiting the turbine. In terms of waste heat usage, the combination of options A and B can be compared with options C, D and E. The simulation result shows that in terms of net power generation, cooling water requirement, and working fluid (R245fa) requirement, the combination of Options A and B gives the best power generation result and this is similar as the result produced by Option C. Following option C is option E which gave a better result than option D. The entropy generation analysis showed that the entropy generation is inversely proportional to the power output. It was also observed that the net power generation for the ORC configuration adopted in this paper (option C) meets the average daily power requirement of the crisps manufacturing process as well as 98.58% of the daily peak power requirement.

نویسندگان

Mathew Aneke [ School of Built and Natural Environment, Northumbria University, Ellison Building, Newcastle upon Tyne, NE1 8ST, UK ]

Brian Agnew [ School of Built and Natural Environment, Northumbria University, Ellison Building, Newcastle upon Tyne, NE1 8ST, UK ]

Chris Underwood [ School of Built and Natural Environment, Northumbria University, Ellison Building, Newcastle upon Tyne, NE1 8ST, UK ]

Hongwei Wu [ School of Engineering and Design, Brunel University, West London, UB8 3PH, UK ]

Salah Masheiti [ School of Mechanical and Systems Engineering, University of Newcastle upon Tyne, NE1 7RU, UK ]

کلمات کلیدی

Crisps Chips Waste heat Power generation Dual heat source ORC

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مشاهده مقالات

Applied Thermal Engineering

The journal features aspects of the thermal engineering of advanced processes, including process integration, intensification and development, together with the application of thermal equipment in process plants. The optimisation of processes to maximise performance is also included.

حوزه های تحت پوشش : Applied Thermal Engineering