Energy separation and condensation effects in pressure energy recovery process of natural gas supersonic dehydration

2021 ◽  
Vol 245 ◽  
pp. 114557
Author(s):  
Yang Liu ◽  
Xuewen Cao ◽  
Jian Yang ◽  
Yuxuan Li ◽  
Jiang Bian
Keyword(s):  
Natural Gas ◽  
Energy Recovery ◽  
Recovery Process ◽  
Energy Separation

scholarly journals The second law analysis of natural gas behavior within a vortex tube

2013 ◽  
Vol 17 (4) ◽  
pp. 1079-1092 ◽  
Author(s):  
Mahyar Kargaran ◽  
A. Arabkoohsar ◽  
S.J. Hagighat-Hosini ◽  
V. Farzaneh-Kord ◽  
Mahmood Farzaneh-Gord
Keyword(s):  
Natural Gas ◽  
Entropy Generation ◽  
Vortex Tube ◽  
Tube Length ◽  
Orifice Diameter ◽  
Working Fluid ◽  
Energy Separation ◽  
Second Law ◽  
Gas Streams ◽  
Mass Fractions

Vortex tube is a simple device without a moving part which is capable of separating hot and cold gas streams from a higher pressure inlet gas stream. The mechanism of energy separation has been investigated by several scientists and second law approach has emerged as an important tool for optimizing the vortex tube performance. Here, a thermodynamic model has been used to investigate vortex tube energy separation. Further, a method has been proposed for optimizing the vortex tube based on the rate of entropy generation obtained from experiments. Also, an experimental study has been carried out to investigate the effects of the hot tube length and cold orifice diameter on entropy generation within a vortex tube with natural gas as working fluid. A comparison has been made between air and natural gas as working fluids. The results show that the longest tube generates lowest entropy for NG. For air, it is middle tube which generates lowest entropy. Integration of entropy generation for all available cold mass fractions unveiled that an optimized value for hot tube length and cold orifice diameter is exist.

Exergoeconomic optimization of a novel multigeneration system driven by geothermal heat source and liquefied natural gas cold energy recovery

2019 ◽  
Vol 209 ◽  
pp. 550-571 ◽  
Author(s):  
Towhid Parikhani ◽  
Towhid Gholizadeh ◽  
Hadi Ghaebi ◽  
Seyed Mohammad Sattari Sadat ◽  
Mehrdad Sarabi
Keyword(s):  
Natural Gas ◽  
Heat Source ◽  
Energy Recovery ◽  
Liquefied Natural Gas ◽  
Geothermal Heat ◽  
Cold Energy

Novel massive thermal energy storage system for liquefied natural gas cold energy recovery

Energy ◽  
2020 ◽  
Vol 195 ◽  
pp. 117022 ◽  
Author(s):  
Jinwoo Park ◽  
Fengqi You ◽  
Hyungtae Cho ◽  
Inkyu Lee ◽  
Il Moon
Keyword(s):  
Energy Storage ◽  
Natural Gas ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Energy Recovery ◽  
Storage System ◽  
Energy Storage System ◽  
Liquefied Natural Gas ◽  
Thermal Energy Storage System ◽  
Cold Energy

Optimized Energy Recovery in Line With Balancing of an ATES

2014 ◽  
Author(s):  
Mohammadreza Behi ◽  
Seyed Aliakbar Mirmohammadi ◽  
Alexander B. Suma ◽  
Björn E. Palm
Keyword(s):  
Energy Storage ◽  
Natural Gas ◽  
Cost Saving ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Energy Cost ◽  
Energy Recovery ◽  
International Energy Agency ◽  
Imbalance Problem ◽  
Aquifer Thermal Energy Storage

The present study explores the potential imbalance problem of the Aquifer Thermal Energy Storage (ATES) system at the Eindhoven University of Technology (TU/e) campus, Eindhoven. This ATES is one of the largest European aquifer thermal energy storage systems, and has a seasonal imbalance problem. Reasons for this issue may be the high cooling demand from laboratories, office buildings and the direct ATES cooling system. Annually, cooling towers use on average 250 MWh electricity for the removal of about 5 GWh of excess heat from the ATES to the surroundings. In addition, the TU/e uses a large amount of natural gas for heating purposes and especially for peak supplies. Recovering the surplus heat of the ATES, a CO2 Trans-critical Heat Pump (HP) system to cover particularly peak demands and total heating demand is proposed, modeled and optimized. The model is validated using data from International Energy Agency. Based on simulation results, 708294 nm3 of natural gas are saved where two different scenarios were considered for the ATES efficiency, cost saving and green house gas reduction. In scenario I, the COP of the ATES increased up to 50% by which K€ 303.3 energy cost and 1288.5 ton CO2 are saved annually. On the other hand, it will be shown that the ATES COP in Scenario II will improve up to 20%. In addition, the proposed energy recovery system results in a 606 ton CO2 -reduction and K€152.7 energy cost saving for the university each year.

Numerical analysis of the energy recovery process in a disc-type pressure exchanger with pressure-boost effect

2018 ◽  
Vol 105 ◽  
pp. 152-159
Author(s):  
Zheng Cao ◽  
Jianqiang Deng ◽  
Zhihua Chen ◽  
Wenjun Yuan
Keyword(s):  
Numerical Analysis ◽  
Energy Recovery ◽  
Recovery Process ◽  
Type Pressure
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