China
Africa
Explore chapters and articles related to this topic
The Art of In-Memory Computing for Big Data Processing
Published in Kuan-Ching Li, Hai Jiang, Albert Y. Zomaya, Big Data Management and Processing, 2017
Mihaela-Andreea Vasile, Florin Pop
The Ignite IMDG uses the main memory as primary storage and offers distributed cache as a key–value store. Compared to Spark, Ignite provides SQL in-memory indexing, which speeds up the SQL queries 100 times faster than in the case of native Spark RDDs. Another important feature consists in the distributed SQL joins or cross-cache joins.
Influence of high carbonization temperatures on key performance indicators of Arundo donax derived biochars
Published in Biofuels, 2021
Oluwatosin Oginni, Kaushlendra Singh
Key combustion performance indicators of the biochars including ignition, maximum and burnout temperatures, are presented in Table 3. Ignition temperatures of the biochars increased from 382 to 535 °C as the carbonization temperature increased from 500 to 900 °C. Oginni et al. [14] reported a similar increase in ignition temperatures of White Pine and Norway Spruce derived biochars from 368 to 480 °C as the carbonization temperature increased from 500 to 900 °C. This increase in the ignition temperature was attributed to the increase in calorific values and decrease in volatile contents of the biochars as the carbonization temperature increases. The ignition temperature represents the minimum temperature at which a solid fuel spontaneously ignites without an external source of ignition [51]. This implies that a solid fuel with a higher volatile content is more readily to ignite and combusts [52]. Therefore, with the high ignition temperatures of the biochars in this study, they cannot readily ignite, and can be considered to have low fire hazard potentials.
Thermal Effect of Oil Tank Heated by External Fire with Influence of Explosion Suppression Materials
Published in Combustion Science and Technology, 2020
Yong Cao, Jian Yao, Yongxu Wang, Lifeng Xie, Bin Li
Four tests were conducted to measure the effect of suppression materials on the thermal radiation of the oil tank. Before the experiment, 200 L fuel oil was filled into the oil tank with the pre-filled suppression materials. The empty oil tank without suppression materials was also filled with 200 L fuel oil as the comparison test. The oil tanks of test 1, test 2, and test 3 were filled with gasoline, just test 4 was filled with diesel oil. Suppression materials were installed in test 3 and test 4. A volume of 20 L kerosene was added to the oil pool. The fire was generated by the ignition head in the oil pool as the fuel to ignite the oil tank. After the ignition of the oil pool, a high-speed camera was used to assess the whole process of the cook-off. The infrared imaging device was utilized to record the surface temperature of the flame in the tank. The temperature of oil liquid and oil vapor was measured by two thermocouples.
A study on thermal stability and combustion performance of hydroxyl-terminated polybutadiene-paraffin blended fuel
Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2020
Sri Nithya Mahottamananda, Parthasarathy Nagarajan Kadiresh, Yash Pal
In Eqs (1) and (2), the (dm/dt)avg and (dm/dt)max are average combustion rate and maximum combustion rate, respectively. Furthermore, the ability to ignite solid fuel can be calculated on the DTG curve by measuring the peak temperature. It is a point on the DTG curve, reflecting the highest mass loss rate due to rapid oxidation (Tognotti et al. 1985). The average temperature related to the combustion rate is considered as the average combustion rate (dm/dt). If the solid fuel possesses low peak temperature, higher will be the ability to ignite. The time taken to attain the maximum combustion rate on the DTG curve is called the maximum combustion time (tm), whereas the time at ignition event called ignition time (ti).