In the present work, an improved Entropy Generation Minimisation (EGM) approach aiming at minimising the revised entropy generation number which is the non-dimensionalised entropy by the ratio of heat flow to the input temperature of the cold fluid is developed for a plate-fin heat exchanger design with multiple design variables with the help of genetic algorithm. It is found that the approach can decrease the total fan power dramatically and improve the exchanger effectiveness simultaneously. Finally, this approach is applied to a heat recovery system where the heat exchanger works as a component of the system.
- Inderscience Publishers
- The Entropy Generation Minimisation based on the Revised Entropy ...
Case study - Waste heat generates steam and savings
OVERVIEWA coil coating facility purchased a new a 15,000 SCFM Regenerative Thermal Oxidizer (RTO) which had a nominal heat transfer efficiency rate of 90% thermal energy recovery. It was designed with supplemental fuel injection (SFI) which is used during low VOC loading conditions, to help save fuel cost. The facility was looking for additional ways to decrease their exhaust air temperature and reduce operating costs. ACTIONThe high exhaust temperature (above 650°F) and large airflow (12,650 SCFM) in the...
Case study - Increasing primary heat recovery
OVERVIEWTekra Corporation is a custom coater of plastic films in Wisconsin, where state regulations require over 98% of the Volatile Organic Compounds (VOCs) emitted from their process be destroyed in an oxidizer system. While considering their first oxidizer system, Tekra`s Engineers did their homework and invested in an early model Regenerative Thermal Oxidizer (RTO). While at the time RTOs were not the cheapest oxidizer option capital-wise, Tekra knew that long-term, an RTO was their best choice for reliable...
Ground Source Heat Pump installed in eco house
This case study looks at a ground source heat pump being installed in London. A Ground Source Heat Pump was chosen as a sustainable and energy efficient way to provide 100% space heating and hot water for this 550m2 new build eco-house in East London. A Heat Recovery Mechanical Ventilation System was also utilised, which, together with Solar Thermal hot water and LED lighting give this stunning property maximum energy efficiency. Please take a look at the PDF attached to get a better idea.
Flooring manufacturer reduces operating costs with a customized heat recovery system - Case Study
Rising energy costs effect your bottom line. You don’t have to be a CFO to understand that energy costs are high and show little sign of relief these days. To combat the rising cost of natural gas, many companies that operate air pollution control systems are beginning to look at methods that economically recover heat for use somewhere else in their manufacturing operations.One leading vinyl flooring manufacturer called on Catalytic Products International, Inc. to analyze and ultimately design and install a...
Modelling the viability of heat recovery from combined sewers
Modelling of wastewater temperatures along a sewer pipe using energy balance equations and assuming steady-state conditions was achieved. Modelling error was calculated, by comparing the predicted temperature drop to measured ones in three combined sewers, and was found to have an overall root mean squared error of 0.37 K. Downstream measured wastewater temperature was plotted against modelled values; their line gradients were found to be within the range of 0.9995–1.0012. The ultimate aim of the modelling...