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 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 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.

Concentration Measurement of Lithium Bromide Aqueous Solution by Electrical Resistivity

2010 ◽  
Author(s):  
Jian Sun ◽  
Lin Fu ◽  
Shigang Zhang ◽  
Wei Hou
Keyword(s):  
Aqueous Solution ◽  
Electrical Resistivity ◽  
Lithium Bromide ◽  
Measurement Methods ◽  
Concentration Measurement ◽  
Low Grade ◽  
Saving Energy ◽  
Resistivity Data ◽  
Absorption Chillers ◽  
Low Grade Heat

Absorption chillers have currently become an important device in saving energy because of its effectiveness in utilizing low grade heat. Lithium bromide is widely used as absorbent in this system. But there were few outstanding concentration measurement methods in practice before. In this paper, complete electrical resistivity data of lithium bromide aqueous solution for concentration measurement was given. The electrical resistivity of lithium bromide aqueous solution was measured at concentrations of 35–70 wt% of lithium bromide and temperatures of 10–100°C. Results of this work can meet the requirement of concentration measurement of lithium bromide in absorption chillers without extracting samples.

Low Temperature Heat Recovery Through Integration of Organic Rankine Cycle and CO2 Removal Systems in a NGCC

2014 ◽  
Author(s):  
Vittorio Tola ◽  
Matthias Finkenrath
Keyword(s):  
Low Temperature ◽  
Heat Recovery ◽  
Power Plants ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Low Grade ◽  
Co2 Removal ◽  
Temperature Heat ◽  
Temperature Levels ◽  
Low Grade Heat

Reducing carbon dioxide (CO2) emissions from power plants utilizing fossil fuels is expected to become substantially more important in the near- to medium-term due to increasing costs associated to national and international greenhouse gas regulations, such as the Kyoto protocol and the European Union Emission Trading Scheme. However, since net efficiency penalties caused by capturing CO2 emissions from power plants are significant, measures to reduce or recover efficiency losses are of substantial interest. For a state-of-the-art 400 MW natural gas-fueled combined cycle (NGCC) power plant, post-combustion CO2 removal based on chemical solvents like amines is expected to reduce the net plant efficiency in the order of 9–12 percentage points at 90% overall CO2 capture. A first step that has been proposed earlier to improve the capture efficiency and reduce capture equipment costs for NGCC is exhaust gas recirculation (EGR). An alternative or complementary approach to increase the overall plant efficiency could be the recovery of available low temperature heat from the solvent-based CO2 removal systems and related process equipment. Low temperature heat is available in substantial quantities in flue gas coolers that are required upstream of the CO2 capture unit, and that are used for exhaust gas recirculation, if applied. Typical temperature levels are in the order of 80°C or up to 100 °C on the hot end. Additional low-grade heat sources are the amine condenser which operates at around 100–130 °C and the amine reboiler water cooling that could reach temperatures of up to 130–140°C. The thermal energy of these various sources could be utilized in a variety of low-temperature heat recovery systems. This paper evaluates heat recovery by means of an Organic Rankine Cycle (ORC) that — in contrast to traditional steam Rankine cycles — is able to convert heat into electricity efficiently even at comparably low temperatures. By producing additional electrical power in the heat recovery system, the global performance of the power plant can be further improved. This study indicates a theoretical entitlement of up to additional 1–1.5 percentage points in efficiency that could be gained by integrating ORC technology with a post-combustion capture system for natural gas combined cycles. The analysis is based on fundamental thermodynamic analyses and does not include an engineering- or component-level design and feasibility analysis. Different ORC configurations have been considered for thermal energy recovery at varying temperature levels from the above-mentioned sources. The study focuses on simultaneous low-grade heat recovery in a single ORC loop. Heat recovery options that are discussed include in series, in parallel or cascaded arrangements of heat exchangers. Different organic operating fluids, including carbon dioxide, R245fa, and N-butane were considered for the analysis. The ORC performance was evaluated for the most promising organic working fluid by a parametric study. Optimum cycle operating temperatures and pressures were identified in order to evaluate the most efficient approach for low temperature heat recovery.

scholarly journals SIMULATION STUDY OF PARABOLIC TROUGH SOLAR POWER PLANTS IN BRAZIL

2019 ◽  
Vol 7 (8) ◽  
pp. 17-28
Author(s):  
Antonio Marcos De Oliveira Siqueira ◽  
Gabi Antoine Altabash ◽  
Rayan Fadi Barhouche ◽  
Gabriel Siqueira Silva ◽  
Fábio Gonçalves Villela
Keyword(s):  
Power Plant ◽  
Heat Exchangers ◽  
Solar Collector ◽  
Power Plants ◽  
Solar Power ◽  
Simulation Software ◽  
Heat Transfer Fluid ◽  
Electricity Production ◽  
Parabolic Trough ◽  
Power Block

Various data reveals the potential of concentrated solar technologies for the electricity production. With global growing energy demand and green-house gas emission, concentrating solar power is considered as one of the promising options and has invited wide attention. In this work, a model for a 30 MW parabolic trough solar power plant system was developed for 31 different locations in Brazil, using TRNSYS simulation software, and TESS and STEC libraries. The power system consists of a parabolic trough solar collector loop connected to a power block by a series of heat exchangers. The solar collector loop consists of a field of parabolic trough collectors, stratified thermal storage tank, pump and heat exchangers to drive the power block and uses Therminol VP1 as heat transfer fluid. The results show that the cities of Recife (PE), Fortaleza (CE), Belterra (PA), Salvador (BA) and Petrolina (PE) stand out for their high monthly values of direct normal irradiation and, resulting the highest production of energy by the same configuration of Solar Central Power Plant.

scholarly journals Risk Analysis of Associated Gas Utilization in Power Plants

2020 ◽  
Vol 5 (8) ◽  
pp. 858-863
Author(s):  
Isaiah Allison ◽  
Roupa Agbadede
Keyword(s):  
Power Plant ◽  
Risk Analysis ◽  
Gas Turbine ◽  
Power Plants ◽  
Simulation Software ◽  
Performance Simulation ◽  
Associated Gas ◽  
Gas Utilization ◽  
Plant Life ◽  
Gas Turbine Power Plant

This study presents the analysis of associated gas fueled gas turbine power plant with a view to harnessing associated gas. GASTURB performance simulation software was employed to model and simulate the design and off design performance of the various engines that made up the power plant investigated. Monte Carlo Simulation using Palisade’s @RISK software was employed to conduct the risk analysis of associated fueled gas turbine by incorporating different variables. A decline rate of -13% was applied over the 20-year period of power plant life, beginning from Year 2015. When the distribution curves for the clean and degraded conditions of DS25 engine set were compared, the plots show that the clean condition generates higher profit than the degraded condition.  Also, when the clean condition for DS25 and LM6K engine sets were compared, the distribution curve plots show that the cluster of DS25 engine set generates a higher profit than the LM6K engine set.

A novel lignite pre-drying system with low-grade heat integration for modern lignite power plants

2014 ◽  
Vol 59 (33) ◽  
pp. 4426-4435 ◽  
Author(s):  
Cheng Xu ◽  
Gang Xu ◽  
Yu Han ◽  
Feifei Liang ◽  
Yaxiong Fang ◽  
...  
Keyword(s):  
Power Plants ◽  
Low Grade ◽  
Heat Integration ◽  
Drying System ◽  
Low Grade Heat

Performance Study of Waste Heat Driven Pressurized Adsorption Chiller

2013 ◽  
Vol 315 ◽  
pp. 380-384
Author(s):  
Khairul Habib
Keyword(s):  
Heat Source ◽  
Waste Heat ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Low Grade ◽  
Performance Study ◽  
Adsorption Chiller ◽  
And Performance ◽  
Low Grade Heat ◽  
Adsorption Desorption

This article presents a transient modeling and performance of a waste heat driven pressurized adsorption chiller. This innovative adsorption chiller employs pitch based activated carbon of type Maxsorb III as adsorbent and R507A as refrigerant as adsorbent-refrigerant pair. This chiller utilizes low-grade heat source to power the cycle. A parametric study has been presented where the effects of adsorption/desorption cycle time, switching time and regeneration temperature on the performance are reported in terms of cooling capacity and coefficient of performance (COP). Results indicate that the adsorption chiller is feasible even when low-temperature heat source is available.

Experimental research on novel adsorption chiller driven by low grade heat source

2007 ◽  
Vol 48 (8) ◽  
pp. 2375-2381 ◽  
Author(s):  
D.C. Wang ◽  
Z.X. Shi ◽  
Q.R. Yang ◽  
X.L. Tian ◽  
J.C. Zhang ◽  
...  
Keyword(s):  
Heat Source ◽  
Experimental Research ◽  
Low Grade ◽  
Adsorption Chiller ◽  
Low Grade Heat
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