Ion heating and energy balance during magnetic reconnection events in the RFX-mod experiment

Reconnection events in high current reversed field pinch plasmas are often associated to the partial or total loss of the helical magnetic topology. The electron temperature collapse during these phenomena is investigated in RFX-mod thanks to high time resolution soft-x-ray diagnostics; these data are used, together with magnetic energy reconstructions, for energy balance analysis. The paper shows that the energy released during reconnection events, similarly to astrophysical plasmas, might be involved in ion heating, the latter being estimated by the energy distribution function of neutral atoms, a rather interesting feature in a reactorial perspective. These issues will be further investigated in RFX-mod2, an upgrade of the present device starting its operations from 2022, where the modified boundary conditions are expected to increase the helical states duration and reduce the frequency of reconnection events.

Performance of a small indirect-injection Diesel engine with intermetallic thermal barrier coated pistons

A multilayer Intermetallic Thermal Barrier Coating has been developed at the University of Windsor using a Cold Spray method. The coating is composed of layers of SHS717 stainless steel (Fe, Cr, Mo, W, C, Mn, Si & B) and layers of aluminum acting as bond coats. The coating properties match the thermophysical properties of metallic engine components. In this study, initial testing of the intermetallic TBC was conducted on the crown of aluminum pistons tested in a small indirect-injection diesel engine operating at full load and various engine RPMs. Indicated and brake performance metrics were analyzed to determine changes in engine performance characteristics when compared to baseline uncoated engine operation. An apparent heat release analysis was completed to determine the change of heat rejection of the engine operating with the TBCs, as well as an energy balance analysis to determine the improvements in the fuel energy conversion. The results from this analysis indicated that indeed the heat transfer losses were reduced with a concurrent modest gain in engine output.

ENERGY BALANCE ANALYSIS BETWEEN ENERGY CONSUMED FOR THE COMPRESSION OF ATMOSPHERIC AIR UP TO 200 BAR, AND THE ENERGY PRODUCED FROM ITS EXPANSION DOWN TO ATMOSPHERIC PRESSURE ON NICHOLAS PITTAS’ PATENT ABOUT STORAGE AND CONTINUOUS PRODUCTION ENERGY SYSTEM

This paper provides the theoretical foundation the patents , of Nicholas Pittas related to storage and continuous production of energy via compressed air. Specifically, the energy balance between consumed energy, used for the compression of atmospheric air to high pressure and heat production within a specific number of stages, and the energy produced during the expansion of compressed air to atmospheric pressure. The heat produced is transported, via a thermal vector, to the expansion process to prevent ice formation in the .

KAJIAN PENERAPAN PRODUKSI BERSIH DI AGROINDUSTRI KOPI WULAN, KECAMATAN MAESAN, KABUPATEN BONDOWOSO

Wulan Coffee Agroindustry is one of agroindustries in region of Bondowoso that applies the semi-wet method and it has potential to be certified by Geographical Indications (IG). The wastes of arabica coffee processing at Wulan Coffee Agroindustry is directly thrown to the surrounding environment without being repaired first, because of that, it is worried that can affect human health and the environment. Therefore, further treatment is necessary to reduce the impact of waste pollutions and improve the efficiency of processing by using cleaner production technology. This study aimed to examine the priority alternative of cleaner production at Wulan Coffee Agroindustry. The method used in this study is descriptive quantitative with mass balance analysis, energy balance analysis, feasibility analysis, and priority analysis of cleaner production application using the method of AHP (Analytical Hierarchy Process). The waste management alternative in the Wulan Coffee Agroindustry were coffee pulp waste processing i.e. cascara tea, briquettes, and animal feed, also the waste water of coffee processing as biogas. The cleaner production applied in the Wulan Coffee Agroindustry had alternatives likes coffee green bean, coffee powder, and cascara tea. It was the priority scale to be applied because technically factor and financial factor consist of NPV, IRR, B/C ratio, and PBP were Rp 1.211.88.689; 49%; 6.27, and 0.76 or 9 month. Therefore, the result of AHP analysis using expert choice application showed that cascara tea was the priority alternative of cleaner production application with value of 15,4. Keyword: arabica coffee, assessment, Bondowoso, feasibility analysis, waste utilization