Abstract
The research attempts to improve upon the performance efficiency of the heat exchanger network system of Pabod Brewery, Port Harcourt, Rivers State, Nigeria. It swaps the heat system of the plant by the use of Pinch Technology to recover waste heat and integrating the recovered energy for process application. The application software is Microsoft Excel and Problem Table Method was employed in the numerical analysis of data. The gross energy expenditure by the plant is 10.44MW at production capacity of 400,000 liters of beer per day. On quantitative aggregate 6.157MW goes for heating and 4.267MW for cooling. A temperature pinch or minimum approach temperature (ΔTmin)of 100C was used in the pinch analysis of the heat exchangers performance. The research findings confirmed minimum heating utility of 5.04MW and cooling utility of 3.09MW. with energy upturn of 1.08MW and 1.23MW for the hot and cold flows respectively. This correlates to energy conservation of 18% for hot utility and 21% for the cold utility. The hot stream pinch temperature is 710C while that of the cold stream is 610C. Heat exchangers network configuration design were performed above and below the pinch The network designs were produced and integrated to produce improved heat exchanger network system for the Brewery plant.
Highlights
Pinch technology and heat process integration, provides a procedural approach for reduced energy consumption in processes
Pinch technology enabled processes identify the right changes in the process conditions that can impact positively on energy economy [4, 12]
Energy swap and recovery introduced by Linnhoff among all the streams in process plant is referred to as heat integration [2]
Summary
Pinch technology and heat process integration, provides a procedural approach for reduced energy consumption in processes. Pinch Technology reproduced a new set of thermodynamically based methods that generate minimal energy levels in design of heat exchanger networks(HEN). The Pinch Technology as a process tool application to Pabod Brewery is design for energy cutback in the heat exchanger network system of this facility [7, 8, 9, 11] , Applying the rigorous thermodynamics based equations developed by Linnhoff to the hot and cold utilities of the case study brewery plant, with appropriate mass and heat load balance viz-a-viz material requirement, optimal minimal heat load requirement could be specified for the company in terms optimal minimal heating and cooling energy requirements
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