scholarly journals Multistage carbon dioxide compressor efficiency enhancement using waste heat powered absorption chillers

2021 ◽  
Author(s):  
Sheikh Ehsan Ul Haq ◽  
Fahim Uddin ◽  
Syed Ali Ammar Taqvi ◽  
Muhammad Naqvi ◽  
Salman Raza Naqvi
Keyword(s):  
Carbon Dioxide ◽  
Waste Heat ◽  
Efficiency Enhancement ◽  
Absorption Chillers ◽  
Compressor Efficiency

Energy and Exergy Analyses of a Power Plant With Carbon Dioxide Capture Using Multistage Chemical Looping Combustion

2016 ◽  
Vol 139 (3) ◽  
Author(s):  
Bilal Hassan ◽  
Oghare Victor Ogidiama ◽  
Mohammed N. Khan ◽  
Tariq Shamim
Keyword(s):  
Carbon Dioxide ◽  
Power Plant ◽  
Natural Gas ◽  
Co2 Capture ◽  
Power Plants ◽  
Waste Heat ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Operating Pressure ◽  
Efficiency Gain

A thermodynamic model and parametric analysis of a natural gas-fired power plant with carbon dioxide (CO2) capture using multistage chemical looping combustion (CLC) are presented. CLC is an innovative concept and an attractive option to capture CO2 with a significantly lower energy penalty than other carbon-capture technologies. The principal idea behind CLC is to split the combustion process into two separate steps (redox reactions) carried out in two separate reactors: an oxidation reaction and a reduction reaction, by introducing a suitable metal oxide which acts as an oxygen carrier (OC) that circulates between the two reactors. In this study, an Aspen Plus model was developed by employing the conservation of mass and energy for all components of the CLC system. In the analysis, equilibrium-based thermodynamic reactions with no OC deactivation were considered. The model was employed to investigate the effect of various key operating parameters such as air, fuel, and OC mass flow rates, operating pressure, and waste heat recovery on the performance of a natural gas-fired power plant with multistage CLC. The results of these parameters on the plant's thermal and exergetic efficiencies are presented. Based on the lower heating value, the analysis shows a thermal efficiency gain of more than 6 percentage points for CLC-integrated natural gas power plants compared to similar power plants with pre- or post-combustion CO2 capture technologies.

scholarly journals Combined Heat & Power: CHP Present & Future

2016 ◽  
Vol 9 (1) ◽  
Author(s):  
M. Patel
Keyword(s):  
Waste Heat ◽  
Hotel Industry ◽  
Energy System ◽  
Electric Generator ◽  
Utility Company ◽  
Absorption Chillers ◽  
Integrated Energy Systems ◽  
Exhaust Heat ◽  
Cooling Loads ◽  
Best Fit

Combined Heat and Power (CHP) is an efficient way to generate electricity and heat by utilizing the waste heat from the electric generator in place of heat from a separate boiler. Currently, most electricity is purchased from a central utility company that generates power at 35% efficiency; the balance of fuel input energy is lost as heat. With CHP some of the electricity is generated onsite and the waste heat from the generator (water jacket and exhaust) is used for space and water heating and other industrial processes that require heat. This reduces the fuel requirements to the boiler which also reduces emissions of Green House Gases (GHG) and other pollutants. Overall CHP efficiencies can make upwards to 85%. CHP is also known as Buildings Cooling, Heating & Power (BCHP), CHP for buildings (CHPB), Integrated Energy Systems (IES), Total Energy System (TES), Tri-generation (Trigen) and Cogeneration. CHP is best fit where there is demand for heat (or cooling load) and electricity is simultaneous e.g. hospitals, the hotel industry, educational institutes. Exhaust heat can be applied to support cooling loads with absorption chillers.

scholarly journals Conversion of gas engine waste heat into cold using absorption chillers

2020 ◽  
Vol 168 ◽  
pp. 00046
Author(s):  
Georgii Karman ◽  
Yurii Oksen ◽  
Olena Trofymova ◽  
Yurii Komissarov ◽  
Borys Dizhevskyi ◽  
...  
Keyword(s):  
Air Conditioning ◽  
Waste Heat ◽  
Lithium Bromide ◽  
Thermodynamic Cycle ◽  
Cooling Capacity ◽  
Coolant Temperature ◽  
Gas Engine ◽  
Absorption Chillers ◽  
Full Conversion ◽  
Heating Medium

A possibility of gas engine waste heat conversion into cold for air conditioning in mines using lithium bromide absorption chillers is investigated. Dependencies of parameters of a thermodynamic cycle and energy indicators of chillers on temperatures of a heating medium and a coolant are obtained using mathematical modelling. It is shown that it is rational to use two chillers with sequential movement of a heating medium and a coolant through them in opposite directions for a full conversion of gas engine waste heat. COP of such a system is 0.733. This allows obtaining 2140 kW of cooling capacity with a coolant temperature of 7 °C when using a gas engine JMS-620 by Jenbacher.

scholarly journals Using the adsorption chillers for waste heat utilisation from the CCS installation

2018 ◽  
Vol 180 ◽  
pp. 02106 ◽  
Author(s):  
Karol Sztekler ◽  
Wojciech Kalawa ◽  
Wojciech Nowak ◽  
Sebastian Stefański ◽  
Jarosław Krzywański ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Liquid State ◽  
System Analysis ◽  
Waste Heat ◽  
Carbon Dioxide Emission ◽  
Power Station ◽  
Separation Unit ◽  
Adsorption Technology ◽  
Coal Power ◽  
Professional Power

Worldwide tendencies in the scope of environmental protection demonstrate the requirement for the limited carbon dioxide emission, that influences on the development of greenhouse effect. As a result of coal as a basic fuel used in the professional power industry, this industry sector is the greatest CO2 polluter and it means that works on the reduction of carbon dioxide in such industry are completely justified. In the IPSEpro programming environment, a reference block model for a conventional coal power station was elaborated, including the CO2 separation unit basing on the adsorption methods with the CO2 preparation installation to liquid state. Simulation researches were conducted with means of numeric techniques, that enabled the system analysis for the CO2 separation unit with the CO2 preparation system to the liquid state, as well as analysis was made for the use of chiller systems, basing on the adsorption technology for waste heat use originating from the compression of CO2 in a cascade system, as well as for potential opportunities for further exploitation of the produced chilled water in the CCS cycle. We analysed in these papers the opportunities for chiller systems application, based on the adsorption chillers in the CCS installation used for the reduction of CO2 emission in the coal power station and its influence on the operation of a power station cycle.

Energy savings in CO2 (carbon dioxide) capture using ejectors for waste heat upgrading

Energy ◽  
2014 ◽  
Vol 65 ◽  
pp. 200-208 ◽  
Author(s):  
Christopher Reddick ◽  
Mikhail Sorin ◽  
Fernand Rheault
Keyword(s):  
Carbon Dioxide ◽  
Energy Savings ◽  
Waste Heat ◽  
Carbon Dioxide Capture

Efficiency Enhancement of Novel Photovoltaic-Thermal (PVT) Air Collector

2014 ◽  
Vol 494-495 ◽  
pp. 1845-1848 ◽  
Author(s):  
Huan Liang Tsai ◽  
Chieh Yen Hsu ◽  
Yung Chou Chen
Keyword(s):  
Solar Cells ◽  
Thermal Efficiency ◽  
Heat Sink ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Conduction Mechanism ◽  
Waste Heat ◽  
Operating Temperature ◽  
The Novel ◽  
Efficiency Enhancement

This paper presents the efficiency enhancement for a novel photovoltaic/thermal (PVT) air collector in which PV and thermal efficiency is simultaneously enhanced with a reciprocal aid. With the encapsulation of solar cells directly on a fin-type heat sink, the direct conduction mechanism and the convective area for the thermal transportation are effectively increased. Through a two-month experiment measurement, it is found that the thermal efficiency of PVT module is obviously enhanced up to over 50% in sunny days. In addition, the waste heat recovery decreases the operating temperature of solar cells and concurrently improves the PV efficiency. The results demonstrate the concurrent enhancement of the novel PVT module in PV electricity and solar thermal efficiency.

Sign in / Sign up

Export Citation Format

Share Document