scholarly journals Energy Storage and Generation for Extreme Temperature and Pressure and Directional Measurement While Drilling Applications

2015 ◽  
Author(s):  
Riccardo Signorelli ◽  
John Cooley
Keyword(s):  
Energy Storage ◽  
Extreme Temperature ◽  
Measurement While Drilling ◽  
Temperature And Pressure

scholarly journals Adsorption Characteristics of Zeolite A Synthesized from Wassa Kaolin for Thermal Energy Storage

2020 ◽  
Vol 9 (3) ◽  
pp. 21
Author(s):  
Linus Kweku Labik ◽  
Bright Kwakye-Awuah ◽  
Eric Kwabena Kyeh Abavare ◽  
Baah Sefa-Ntiri ◽  
Isaac Nkrumah ◽  
...  
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Chemical Potential ◽  
Isosteric Heat ◽  
Zeolite A ◽  
Temperature And Pressure ◽  
Effective Use ◽  
The Cost ◽  
Adsorption Isosteres

Zeolites based on the numerous applications can be utilised in providing solutions to some challenges of our world. With the ability to store thermal energy as chemical potential, zeolites are able to store thermal energy for long periods. This can occur with very minimal loss of energy and indefinitely unless the zeolite comes into contact with an adsorbate. The use of zeolite - water as adsorbent - adsorbate pair in thermal energy storage (TES) applications have been studied and have shown good results. However, the cost of zeolites synthesized from reagents continue to hamper the effective use of this adsorbent. Zeolite A was synthesized from kaolin from Wassa in Ghana based on a modified synthesis route. The adsorption properties of the zeolite utilising a designed and fabricated TES system using amounts of 100g, 200g, 300g, 400g and 500g of zeolite with a 1:1.5 ratio to water. Adsorption isosteres were plotted with the temperature and pressure values recorded and results showed correlation to adsorption behaviour of zeolites. Langmuir adsorption isotherms with r-squared values greater than 90% confirmed the affinity of water for zeolites. isosteric heat of adsorption was calculated with the minimum being 5,655.84 J/g and the maximum being 8,113.44 J/g. This confirms that the Zeolite A synthesized from Was kaolin has the structural properties needed for TES applications.

Thermodynamic Models for the Temperature and Pressure Variations Within Adiabatic Caverns of Compressed Air Energy Storage Plants

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
R. Kushnir ◽  
A. Ullmann ◽  
A. Dayan
Keyword(s):  
Energy Storage ◽  
Storage Temperature ◽  
Pressure Ratio ◽  
Pressure Fluctuations ◽  
Compressed Air ◽  
Plant Performance ◽  
Sensitivity Analyses ◽  
Compressed Air Energy Storage ◽  
State Equations ◽  
Temperature And Pressure

The temperature and pressure variation limits within the cavern of a compressed air energy storage (CAES) plant affect the compressor and turbine works, the required fuel consumption and therefore the overall plant performance. In the present work, the thermodynamic response of adiabatic cavern reservoirs to charge/discharge cycles of CAES plants are studied. Solutions for the air cavern temperature and pressure variations were derived from the mass and energy conservation equations, and applied to three different gas state equations, namely, ideal, real, and a self-developed simplified gas models. Sensitivity analyses were conducted to identify the dominant parameters that affect the storage temperature and pressure fluctuations. It is demonstrated that a simplified gas model can adequately represent the air thermodynamic properties. The stored air maximal to minimal temperature and pressure ratios were found to depend primarily on, both the ratio of the injected to the initial cavern air mass, and the reservoir mean pressure. The results also indicate that the storage volume is highly dependent on the air maximum to minimum pressure ratio. Its value should preferably be in between 1.2 and 1.8, where the exact selection should account for design and economic criteria.

scholarly journals Alkanes increase the stability of early life membrane models under extreme pressure and temperature conditions

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Loreto Misuraca ◽  
Bruno Demé ◽  
Philippe Oger ◽  
Judith Peters
Keyword(s):  
Early Life ◽  
Hydrothermal Vents ◽  
Time Window ◽  
Extreme Temperature ◽  
Adaptive Strategy ◽  
Multilamellar Vesicle ◽  
Chain Dynamics ◽  
Terrestrial Life ◽  
Temperature And Pressure ◽  
Membrane Components

AbstractTerrestrial life appeared on our planet within a time window of [4.4–3.5] billion years ago. During that time, it is suggested that the first proto-cellular forms developed in the surrounding of deep-sea hydrothermal vents, oceanic crust fractures that are still present nowadays. However, these environments are characterized by extreme temperature and pressure conditions that question the early membrane compartment’s capability to endure a stable structural state. Recent studies proposed an adaptive strategy employed by present-day extremophiles: the use of apolar molecules as structural membrane components in order to tune the bilayer dynamic response when needed. Here we extend this hypothesis on early life protomembrane models, using linear and branched alkanes as apolar stabilizing molecules of prebiotic relevance. The structural ordering and chain dynamics of these systems have been investigated as a function of temperature and pressure. We found that both types of alkanes studied, even the simplest linear ones, impact highly the multilamellar vesicle ordering and chain dynamics. Our data show that alkane-enriched membranes have a lower multilamellar vesicle swelling induced by the temperature increase and are significantly less affected by pressure variation as compared to alkane-free samples, suggesting a possible survival strategy for the first living forms.

Design Optimization of Compact Superalloy Heat Exchangers for Extreme Temperature and Pressure Conditions

2021 ◽  
Author(s):  
Kaiyuan Jin ◽  
Akshay Bharadwaj Krishna ◽  
Zachary Wong ◽  
Timothy Fisher ◽  
Ivan Catton ◽  
...  
Keyword(s):  
Design Optimization ◽  
Heat Exchangers ◽  
Extreme Temperature ◽  
Temperature And Pressure

Volume-translated cubic EoS and PC-SAFT density models and a free volume-based viscosity model for hydrocarbons at extreme temperature and pressure conditions

2013 ◽  
Vol 359 ◽  
pp. 38-44 ◽  
Author(s):  
Ward A. Burgess ◽  
Deepak Tapriyal ◽  
Bryan D. Morreale ◽  
Yee Soong ◽  
Hseen O. Baled ◽  
...  
Keyword(s):  
Free Volume ◽  
Extreme Temperature ◽  
Viscosity Model ◽  
Temperature And Pressure

High-Temperature Steam Supply: Configuration Design for Temperature Control Stability

1991 ◽  
Vol 113 (1) ◽  
pp. 12-19 ◽  
Author(s):  
J. P. Mumm ◽  
J. Orozco
Keyword(s):  
Extreme Temperature ◽  
Temperature Stability ◽  
Numerical Code ◽  
Operating Characteristics ◽  
Test Specifications ◽  
Process Operation ◽  
Temperature And Pressure ◽  
High Temperature Steam ◽  
Control Stability ◽  
Nominal Temperature

The main objective of this investigation is to report on the development and testing of a numerical code to simulate the operating characteristics of a steam-powered propulsion system. The test specifications permitted a temperature variation of 135 K (75°F) from the nominal temperature 1144 K (1600°F). Due to the extreme temperature and pressure involved, any overshoot would severly shorten the life of the facility. The predicted performance of the system was then evaluated for temperature stability. The code was also used to determine the modifications required to stabilize temperature variations. Testing was performed to better understand the dynamics of the process operation. The experimental data verified the predictions of the numerical code.

Equation of state density models for hydrocarbons in ultradeep reservoirs at extreme temperature and pressure conditions

2013 ◽  
Author(s):  
Yue Wu ◽  
Babatunde A. Bamgbade ◽  
Ward A. Burgess ◽  
Deepak Tapriyal ◽  
Hseen O. Baled ◽  
...  
Keyword(s):  
Equation Of State ◽  
Extreme Temperature ◽  
State Density ◽  
Temperature And Pressure
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