Pipelines are one of great important components for gas and petrochemical industries. Normally, they are used to transport gas by hundreds or even thousands of miles. It is a momentous task to keep the gas pipeline under safety operation. Leak…
Methane is the primary component of liquefied natural gas (LNG) and a potent greenhouse gas (GHG). The undesired methane emissions across the natural gas supply chain has been proven to worsen the lifecycle GHG emissions from the transportation…
In order to calculate the wax deposition rate of crude oil pipelines and discuss its regularity, a pseudo-three-dimensional wax deposition numerical model was established based on computational fluid dynamics and heat transfer theory. The model…
If the crude oil in storage tank is directly heated without considering its temperature distribution, several problems will occur, namely, the thermal expansion of crude oil, and the uneven thickness of the condensate layer, bringing difficulty to…
High-pour point and high-viscosity crude oil can be gathered and transported below the pour point during a high water-cut period. However, oil under these conditions can easily aggregate, thereby blocking the pipeline. In this study, a comprehensive…
Wax diffusion characteristics are of great importance to the wax deposition prediction in crude oil pipelines. The wax diffusion process of water in oil emulsion (w/o emulsion) is more complicated on account of the influence from dispersed water…
Fouling in heat exchangers is the unwanted buildup of material on the heat exchange surface which reduces thermal efficiency. The crude preheat train usually consists of a set of heat exchangers which tend to become fouled. Crude oil fouling can be…
The prediction of ageing phenomena in Liquefied Natural Gas is based on two hypotheses: considering evaporation rate or considering heat flow transferred to the hydrocarbons mixture. This paper proposes two models based on these premises and…
Homogeneous ternary and quaternary molten nitrate salts with low melting points (110 C) with enhanced thermo-physical properties were synthesized for thermal energy storage media and heat transfer fluids. The ternary and quaternary molten salts were…
The present work presents and analyzes the results acquired from outdoor experimental measurements of a solar latent heat storage unit integrated with built-in thermal energy storage at the presence and absence of porous media. The tank consists of a…
If the crude oil in storage tank is directly heated without considering its temperature distribution, several problems will occur, namely, the thermal expansion of crude oil, and the uneven thickness of the condensate layer, bringing difficulty to…
This paper concerns the optimum design of double elliptical latent heat storage units during the charging process using three-dimensional numerical simulation. Water and RT35 are employed as the heat transfer fluid and phase change material,…
Conventional thermal energy storage (TES) media and heat transfer fluids (HTFs) currently used in commercial concentrated solar power (CSP) plants are nitrate-based molten salts with working temperature up to about 565 C. Current interest in raising…
This paper concerns the ongoing studies on a Concentrated Solar Power (CSP) plant in operation in Ottana (Italy), comprising a 629 kW organic Rankine cycle (ORC) unit fed by a linear Fresnel solar field. Hexamethyldisiloxane (MM) and "Therminol SP-I"…
Latent heat thermal energy storage was widely used to solve the problem of the intermittency in time and space for solar energy systems. To improve the energy storage efficiency, metal fins were typically further added to the shell side to increase…
Thermal energy storage devices are vital for reducing the inconsistency between energy supply and demand as well as for enhancing the performance of solar thermal systems. The present study investigates the melting process in metallic honeycombed…
Crude palm oil (CPO) is the main product of oil palm processing and is obtained through a series of unit operations. In a palm oil mill, the main unit operations involve applying saturated steam in the steriliser and digester. The high temperature…
This work evaluates the influence of combining twisted fins in a triple-tube heat exchanger utilised for latent heat thermal energy storage (LHTES) in three-dimensional numerical simulation and comparing the outcome with the cases of the straight…
The application of thermal energy storage using thermochemical heat storage materials is a promising approach to enhance solar energy utilization in the built environment. Potassium carbonate (K2CO3) is one of the potential candidate materials to…
A 17 kWhth packed bed thermal energy storage (PBTES) system for concentrated solar power application (CSP) has been investigated by using a two-phase energy model. The PBTES system used in this study consists of quartzite as storage material and…
Salt hydrates are ideal for long-term thermochemical heat storage in a built environment, where K2CO3 is considered a promising thermochemical heat storage material. This class of materials continues to encounter certain technical bottlenecks in…
Concentrated solar power (CSP) uses solar insolation to increase the temperature of heat transfer fluid (HTF), which can be used in a power block to produce power either by using a steam turbine or gas turbine. In CSP, the levelized cost of…
This paper studies experimentally the burning behavior of crude karanja oil pool fires in free burning. Experiments were conducted in pool size from 0.2 to 0.5 m. Various parameters such as mass loss rate, flame height, centerline temperature, and…
Adopting phase change materials (PCMs), the latent heat thermal energy storage (LHTES) technology provides a potential solution to solve the fluctuation and instability of solar energy utilization. However, its applicability is strictly limited by…
The submarine CO2 hydrate-based geological storage is an effective method for carbon capture and storage, which is significant for mitigating the greenhouse effect. The pressure and temperature variation can affect the storage stability of CO2…
In order to propose the control strategies based on exergy to realize efficient and energy-saving operation of the engine, the energy and exergy balance under sensitive boundary conditions were analyzed with the first and second laws of…
Liquefied Natural Gas (LNG) is stored in cryogenic tanks at receiving terminals. During the LNG storage some part of LNG evaporates into gas phase. Evaporated LNG is called Boil off Gas (BOG). Heat flow has an influence on evaporation process. It…
In this work, a comprehensive evaluation was conducted to study the effect of diesel injection strategy on natural gas-diesel dual-fuel combustion using micro genetic algorithm (micro-GA) optimization. Firstly, the effects of different injection…
In this research, it was investigated the energy fraction and emission characteristics of natural gas/diesel dual-fuel combustion in terms of the combustion index such as combustion duration and mass fraction burned 50% (MFB50) of a 6-L heavy-duty…
On- and off-road heavy-duty diesel engines modified to spark-ignition natural gas operation can reduce U.S. dependence on imported oil and enhance national energy security. Engine conversion can be achieved through the addition of a gas injector in…
A comparative energy and exergy analysis was experimentally performed using a bi-fuel compressed natural gas (CNG) spark ignition engine. The experiments were conducted for gasoline and CNG fuel at 1700 rpm and different operating loads from 5 to 30…
This paper used the partition method mathematical model, considering the oil's latent heat effects and the cyclical changes of atmospheric temperature, studied on the influence of crude oil properties on heat and mass transfer during the process of…
Machine learning algorithms are effective tools to reduce the number of engine dynamometer tests during internal combustion engine development and/or optimization. This paper provides a case study of using such a statistical algorithm to characterize…
The pressurized oxy-fuel combustion system is renowned for its compatibility with carbon capture and storage technologies. This study aims to investigate the characteristics and potential of the pressurized oxy-fuel combustion system using unpurified…
Deepwater oil and gas exploitation has become an important field in the petroleum industry development. However, there are still no mature methods for hydrate prevention in the deepwater wells cleanup stage, and the excessive use of inhibitors has…
This paper proposes a novel virtual engine calibration method for alternative fuels using thermodynamic simulation for in-cylinder pressure prediction. Based on known engine data, including the crank angle of the peak cylinder pressure, the…
A mathematical model of thermogravitational heat transfer process in a closed area of liquefied natural gas (LNG) tanks is constructed and a numerical study is made. An unsteady system of energy and Navier-Stokes equations in dimensionless speed…
One important scientific objective of the national research project SUGAR Submarine Gas Hydrate Reservoirs was the development, improvement, and test of innovative concepts for the production of methane from natural gas hydrate reservoirs.…
Natural gas hydrate (NGH) is one of the potential green alternative energy sources, and its exploration and development has become one of the key directions of energy development in China. In order to solve the problem of wellbore instability in the…
In the production process of deep-water wells, when the high-temperature formation fluid flows to the wellhead, it may transfer heat to the formation through the wellbore as the result of temperature difference. This can destroy the original…
An approach to modeling the processes of non-isothermal multiphase flow in oil reservoir is considered. The approach is based on implicit calculation of pressure using the finite element method and explicit calculation of phase saturations. The…
Wax diffusion characteristics are of great importance to the wax deposition prediction in crude oil pipelines. The wax diffusion process of water in oil emulsion (w/o emulsion) is more complicated on account of the influence from dispersed water…
A real-time mathematical model for the two-dimensional temperature field of petroleum coke calcination in vertical shaft calciner was developed based on computational fluid dynamics. In the modeling process, the petroleum coke discharging process was…
Liquefied natural gas (LNG) has an increasingly important role in the global natural gas market. Global demand for natural gas will grow over the coming years. LNG is transported by ships to unloading points at the storage terminals. During the LNG…
This chapter deals with the heat and mass transfer characteristics of petroleum fluid before decomposition into gasoline, kerosene, naphtha, diesel, etc. A convection-radiation heating furnace has been designed as a heating source of the petroleum…
Biopile could improve the remediation efficiency of petroleum-contaminated soil, but the volatilization of petroleum also occurred during the biopile process. To quantitatively estimate the roles of volatilization and microbial degradation during the…
High-pour point and high-viscosity crude oil can be gathered and transported below the pour point during a high water-cut period. However, oil under these conditions can easily aggregate, thereby blocking the pipeline. In this study, a comprehensive…
By means of additional specific heat capacity and momentum source terms methods, the physical and mathematical models of the heat transfer process of waxy crude oil during its static cooling in the vault tank are established. Through the numerical…
Hydrocarbons are trapped at great depths with pressure and temperature higher than surface conditions which would vary depending on reservoir properties. When the well is set on production, these hydrocarbons travel through the wellbore over reducing…