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 ...
Increasing ambition for renewable heating and cooling: Is the current energy modelling enough?
EGEC has released a policy paper assessing the current European Commission’s energy modelling for heating and cooling, used to generate forecasts that serve as basis for policy proposals and policy making. The resulting analysis shows a lack of robustness in the Commission’s forecasts for the heating and cooling sector, which translates in a lack of ambition, in the initial Commission’s proposal, for the future of the renewable heating and cooling (RES-HC) sector. The decarbonisation of the...
Timing is everything - Getting your heat network plan to work
For affordable housing providers, maintaining heating and hot water supplies to residents is one of the biggest challenges; especially when it comes to frequently involving the care of vulnerable user groups, and routinely gaining access to occupied properties. Although communal heating schemes (featuring shared boiler plant or other more sustainable heat sources) can offer significant efficiencies, as well as avoiding the need for annual safety inspections; precise planning and timetabling remains critical to...
Thermal Screw Conveyors: Heated or Chilled
Industrial screw conveyors, also known as auger conveyors, are a widely-used method of bulk conveyance in many industries. These industries include food and chemical processing, water treatment plants, biofuel production, agriculture, and more. Besides conveyance, there are added benefits industrial screw conveyors can bring to its users. One of these benefits is the ability to heat or chill the product being conveyed. Our start into thermal screw conveyor manufacturing began nearly 10 years ago, when a cheese...
Investigating the interactions of decentralized and centralized wastewater heat recovery systems
In the urban water cycle there are different sources for extracting energy. In addition to potential and chemical energy in the wastewater, thermal energy can also be recovered. Heat can be recovered from the wastewater with heat exchangers that are located decentralized and/or centralized at several locations throughout the system. It can be recovered directly at the source (e.g. in the showers and bathrooms), at building block level (e.g. warm water tanks collecting all grey water), in sewers or at the wastewater...
Case study - Heat loss - A problem for wastewater treatment & nitrification
Problem: Operators know aerobic and anaerobic systems need sufficient water temperature to keep microbial populations active and working. Heat loss is detrimental to effluent quality and gas production. Both systems can be negatively affected from low daily and seasonal temperatures. Unfortunately, most operators and engineers have no control over water temperature loss in their tanks and basins.A northern Wisconsin cheese plant was dependent upon their anaerobic digester to reduce COD to a level they could...