scholarly journals A thermodynamic platform for evaluating the energy efficiency of combined power generation and desalination plants

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Kim Choon Ng ◽  
Muhammad Burhan ◽  
Qian Chen ◽  
Doskhan Ybyraiykul ◽  
Faheem Hassan Akhtar ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Efficiency ◽  
Power Plants ◽  
Flame Temperature ◽  
Primary Energy ◽  
Low Grade ◽  
Heat Engines ◽  
Desalination Plants ◽  
Low Grade Heat ◽  
Thermal Sources

AbstractIn seawater desalination, the energy efficiency of practical processes is expressed in kWh_electricity or low-grade-heat per m3 of water produced, omitting the embedded energy quality underlying their generation processes. To avoid thermodynamic misconceptions, it is important to recognize both quality and quantity of energy consumed. An unmerited quantitative apportionment can result in inferior deployment of desalination methods. This article clarifies misapprehensions regarding seeming parity between electricity and thermal sources that are sequentially cogenerated in power plants. These processes are represented by heat engines to yield the respective maximum (Carnot) work potentials. Equivalent work from these engines are normalized individually to give a corresponding standard primary energy (QSPE), defined via a common energy platform between the adiabatic flame temperature of fuel and the surroundings. Using the QSPE platform, the energy efficiency of 60 desalination plants of assorted types, available from literature, are compared retrospectively and with respect to Thermodynamic Limit.

scholarly journals Using adsorption chillers for utilising waste heat from power plants

2019 ◽  
Vol 23 (Suppl. 4) ◽  
pp. 1143-1151 ◽  
Author(s):  
Karol Sztekler ◽  
Wojciech Kalawa ◽  
Sebastian Stefanski ◽  
Jaroslaw Krzywanski ◽  
Karolina Grabowska ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Efficiency ◽  
Power Plant ◽  
Power Plants ◽  
Waste Heat ◽  
Primary Energy ◽  
Simulation Software ◽  
Coefficient Of Performance ◽  
Low Grade ◽  
Adsorption Chiller

At present, energy efficiency is a very important issue and it is power generation facilities, among others, that have to confront this challenge. The simultaneous production of electricity, heat and cooling, the so-called trigeneration, allows for substantial savings in the chemical energy of fuels. More efficient use of the primary energy contained in fuels translates into tangible earnings for power plants while reductions in the amounts of fuel burned, and of non-renewable resources in particular, certainly have a favorable impact on the natural environment. The main aim of the paper was to investigate the contribution of the use of adsorption chillers to improve the energy efficiency of a conventional power plant through the utilization of combined heat and power waste heat, involving the use of adsorption chillers. An adsorption chiller is an item of industrial equipment that is driven by low grade heat and intended to produce chilled water and desalinated water. Nowadays, adsorption chillers exhibit a low coefficient of performance. This type of plant is designed to increase the efficiency of the primary energy use. This objective as well as the conservation of non-renewable energy resources is becoming an increasingly important aspect of the operation of power generation facilities. As part of their project, the authors have modelled the cycle of a conventional heat power plant integrated with an adsorption chiller-based plant. Multi-variant simulation calculations were performed using IPSEpro simulation software.

scholarly journals The influence of adsorption chillers on CHP power plants

2018 ◽  
Vol 240 ◽  
pp. 05033 ◽  
Author(s):  
Karol Sztekler ◽  
Wojciech Kalawa ◽  
Sebastian Stefański ◽  
Jarosław Krzywanski ◽  
Karolina Grabowska ◽  
...  
Keyword(s):  
Power Plant ◽  
Power Plants ◽  
Industrial Process ◽  
Primary Energy ◽  
Simulation Software ◽  
Low Grade ◽  
Adsorption Chiller ◽  
Absorption Chillers ◽  
Low Grade Heat ◽  
Heat Power Plant

The simultaneous production of electricity, heat and cooling, the so-called trigeneration, allows for substantial savings in the chemical energy of fuels. More efficient use of the primary energy contained in fuels translates into tangible earnings for power plants while reductions in the amounts of fuel burned, and of non-renewable resources in particular, certainly have a favourable impact on the natural environment. The main aim of the above-described project was to analyse the influence of use adsorption contacted to conventional CHP power plant. An adsorption chiller is an item of industrial equipment that is driven by low grade heat and intended to produce chilled water and desalinated water. Adsorption chillers ACH can by used for utilization heat from many industrial process where temperature medium is too low for use absorption chillers. In this article modelled the cycle of a conventional heat power plant integrated with an adsorption chiller-based plant. Multi-variant simulation calculations were performed using IPSEpro simulation software.

scholarly journals Small Scale Power Generation using Low Grade Heat from Solar Pond

2012 ◽  
Vol 49 ◽  
pp. 50-56 ◽  
Author(s):  
Baljit Singh ◽  
J. Gomes ◽  
Lippong Tan ◽  
Abhijit Date ◽  
A. Akbarzadeh
Keyword(s):  
Power Generation ◽  
Small Scale ◽  
Low Grade ◽  
Solar Pond ◽  
Low Grade Heat

Alternative thermal regenerative osmotic heat engines for low-grade heat harvesting

Energy ◽  
2020 ◽  
Vol 195 ◽  
pp. 117042 ◽  
Author(s):  
Rui Long ◽  
Yanan Zhao ◽  
Zuoqing Luo ◽  
Lei Li ◽  
Zhichun Liu ◽  
...  
Keyword(s):  
Low Grade ◽  
Heat Engines ◽  
Low Grade Heat

scholarly journals An optimised chemisorption cycle for power generation using low grade heat

2017 ◽  
Vol 186 ◽  
pp. 251-261 ◽  
Author(s):  
Huashan Bao ◽  
Zhiwei Ma ◽  
Anthony Paul Roskilly
Keyword(s):  
Power Generation ◽  
Low Grade ◽  
Low Grade Heat
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