Decomposition of Energy Consumption and Energy Intensity in Indian Manufacturing Industries

Of the total final energy consumption in India, the industrial sector accounts for about 37 percent, of which the manufacturing sector consumes about 66 percent (2004-2005 figures) with chemicals and petrochemicals, iron and steel, pulp and paper and cement industries being the largest energy users. In the recent past, energy intensity in the manufacturing sector has been decreasing. This decline is mainly due to fuel substitution away from coal in some of the sectors, most notably cement. While industrial production in developed countries stabilizes and declines, the industrial output in the developing world continues to expand owing to rising populations and catching up on economic growth. This can result in higher energy use energy provided primarily by the combustion of fossil fuels and thereby higher carbon-dioxide (CO2) emissions. Using the decomposition analysis we show that most of the intensity reductions are driven purely by structural effect rather than energy intensity.Energy Consumption, Energy intensity, India, Manufacturing Industries

Decomposition of energy consumption and energy intensity in Indian manufacturing industries

Of the total final energy consumption in India, the industrial sector accounts for about 37 percent, of which the manufacturing sector consumes about 66 percent (2004-2005 figures) with chemicals and petrochemicals, iron and steel, pulp and paper and cement industries being the largest energy users. In the recent past, energy intensity in the manufacturing sector has been decreasing. This decline is mainly due to fuel substitution away from coal in some of the sectors, most notably cement. While industrial production in developed countries stabilizes and declines, the industrial output in the developing world continues to expand owing to rising populations and catching up on economic growth. This can result in higher energy use - energy provided primarily by the combustion of fossil fuels - and thereby higher carbon-dioxide (CO2) emissions. Using the decomposition analysis we show that most of the intensity reductions are driven purely by structural effect rather than energy intensity.

Understanding industrial energy use - Physical energy intensity changes in Indian manufacturing sector

We develop and analyze physical energy intensity indicators for Indian manufacturing sector. Energy consumption in five industrial sub-sectors, viz., iron and steel, aluminium, textiles, paper and cement is examined for the period 19902005. It is feasible to develop specific energy consumption indicators that reflect the physical reality more accurately than monetary energy intensities. These indicators allow us to analyze the effect of change in product mix over time. The use of physical energy intensity indicators improves comparability between countries, offers valuable input for policy-makers regarding intra-sectoral structural changes, and provides detailed explanation for observed changes in energy intensity. Hence, the results of the study point out the need to use physical indicators for policy making.Energy intensity, manufacturing/industry sector, product mix, energy indicators

Understanding industrial energy use: Physical energy intensity changes in Indian manufacturing sector

We develop and analyze physical energy intensity indicators for Indian manufacturing sector. Energy consumption in five industrial sub-sectors, viz., iron and steel, aluminium, textiles, paper and cement is examined for the period 1990Ä2005. It is feasible to develop specific energy consumption indicators that reflect the physical reality more accurately than monetary energy intensities. These indicators allow us to analyze the effect of change in product mix over time. The use of physical energy intensity indicators improves comparability between countries, offers valuable input for policy-makers regarding intra-sectoral structural changes, and provides detailed explanation for observed changes in energy intensity. Hence, the results of the study point out the need to use physical indicators for policy making.Energy intensity, manufacturing/industry sector, product mix, energy indicators

Microwave assisted pyrazole derivative synthesis

In the past few decades, many significant advances in organic chemistry, such as the novel synthetic reagents and methods, as well as the advent of an array of analytical apparatus and techniques, have made the organic synthesis more dynamic and effective than ever before. However, the practical aspects for carrying out laboratory-scale reactions have changed little during this period. Especially when heating is necessary, oil baths and heating jackets are the main equipment used. These traditional heating techniques are slow and time-consuming, and sometimes can lead to overheating and decomposition of the substrate and product. To this end, microwaves have been employed in organic chemistry to reduce the reaction times from hours to minutes, to increase yields and selectivity1

Bench Scale Evaluation of Dense Ceramic Membranes for Production of High Purity Hydrogen from Gasification

Gasification for production of hydrogen and other useful gases, has achieved increasing importance in recent years. The reactions involved in gasification are favored at high temperatures and they are also limited by thermodynamic equilibrium. The development of membranes which can separate these gases under gasifier exit gas condition will significantly improve process efficiency and economics and simultaneously provide for the recovery of valuable gases. The availability of a membrane with adequate hydrogen selectivity and good thermal and mechanical stability is the key for the successful application of membrane technology in hydrogen production and separation. This work introduces a special method of laser based deposition to synthesize Palladium-Platinum (Pd/Pt)-ceramic composite membranes and permeation results of a ceramic membrane, permeable only to hydrogen, provided by Ceramatec Inc. Thin film Pd was deposited on a ceramic substrate by Nd-YAG laser irradiation of PdCl2 coated on γ-alumina substrate. Similarly a Pt thin film was also synthesized from PtCl4 coated γ-alumina substrate. The parameters of the laser beam were optimized, and a new procedure to synthesize metalceramic composite membranes was developed. The characteristics of Pd and Pt coated γ- alumina membranes were studied and compared. Hydrogen permeation experiments were performed in a CO+CO 2+CH4+H2 environment under typical catalytic steam gasifier exit conditions. The Pd-ceramic composite showed good mechanical and thermal stability with a hydrogen permeability flux of 0.061 (mol/m2s). The activation energy of the Pdmembrane was found to be 5.39 (kJ/mol) in a temperature range of 900-1300°F. The ceramic membrane provided by Ceramatec Inc. was tested under the same conditions used to test the Pd membranes. This ceramic membrane showed good thermal and chemical stability and provided the hydrogen permeability flux of 0.0321 (mol/m2 )

Dynamo in Protostar

In this paper, we estimate the magnetic Reynolds number of a typical protostar before and after deuterium burning, and claim for the existence of dynamo process in both the phases, because the magnetic Reynolds number of the protostar far exceeds the critical magnetic Reynolds number for dynamo action. Using the equipartition of kinetic and magnetic energies, we estimate the steady-state magnetic field of the protostar to be of the order of kilo-gauss, which is in good agreement with observations.Comment: 5 page

Peripartum cardiomyopathy: an obstetric review

Peripartum cardiomyopathy (PPCM) is a rare and potentially fatal form of systolic heart failure which presents in later months of pregnancy and post-partum. Incidence varies over geography and ethnicity. It is highest in the African tribes of Hausa and Fulani. The incidence in the United States ranges from 1 in 1500-7500 births. Risk factors include advanced maternal age, multiparity, preeclampsia, multifetal gestation and African descent. Various etiologies such as viral myocarditis, abnormal immune and hemodynamic response to pregnancy, inflammatory mediation and genetic susceptibility have been proposed. Of late, the role of abnormal prolactin metabolism and resulting myocardial toxicity have been explored and bromocriptine has shown promise as a potential treatment option. Medical management is similar to other causes of systolic heart failure, except that ACE inhibitors and angiotensin receptor blockers are avoided in pregnancy. Complications include cardiac arrhythmias, thromboembolism and refractory heart failure can occur. Maternal deaths are not uncommon

Mucormycosis of oral cavity: a descriptive case report from a tertiary care hospital

We presented an interesting case report of mucormycosis (Rhizopus Oryzae) in a recovered COVID-19 patient, its diagnosis and identification. The patient in past visited our institute with symptoms of COVID-19, she was a known case of tuberculosis and was taking ATT and diabetic (DM-2) patient. She was diagnosed COVID positive and successfully treated at our institution and discharged after recovering from the complications. After approximately two months of getting discharged from the hospital she again visited the post COVID clinic with symptoms of fever and numbness around face and on routine examination a blackish tissue like growth seen involving the hard palate and post nasal area. Mucormycosis (phycomycosis, zygomycosis) is an acute opportunistic infection generally develops secondary to debilitating diseases. But increased incidence was noticed in COVID-19 affected individuals. In head, neck and oral cavity the mold usually gains entry through respiratory route involving maxillary sinuses and oral cavity. The fungus causes great damage to the anatomical structures leading its necrosis. Hence an early diagnosis and surgical interventions is must for a good prognosis, decreasing morbidity and mortality. Extensive Research needs to be carried out in COVID patient specially treatment to prevent and reduce the cases of opportunistic infection in order to reduce its incidence and morbidity/mortality

Dynamic Phasor Modeling of Type 3 Wind Farm including Multi-mass and LVRT Effects

The proportion of power attributable to wind generation has grown significantly in the last two decades. System impact studies such as load flow studies and short circuit studies, are important for planning before integration of any new wind generation into the existing power grid. Short circuit modelling is central in these planning studies to determine protective relay settings, protection coordination, and equipment ratings. Numerous factors, such as low voltage situations, power electronic switching, control actions, sub-synchronous oscillations, etc., influence the response of wind farms to short circuit conditions, and that makes short circuit modelling of wind farms an interesting, complex, and challenging task. Power electronics-based converters are very common in wind power plants, enabling the plant to operate at a wide range of wind speeds and provide reactive power support without disconnection from the grid during low voltage scenarios. This has led to the growth of Type 3 (with rotor side converter) and Type 4 (with stator side full converter) wind generators, in which power electronics-based converters and controls are an integral part. The power electronics in these generators are proprietary in nature, which makes it difficult to obtain the necessary information from the manufacturer to model them accurately in planning studies for conditions such as those found during faults or low voltage ride through (LVRT) periods. The use of power electronic controllers also has led to phenomena such as sub-synchronous control interactions in series compensated Type 3 wind farms, which are characterized by non-fundamental frequency oscillations. The above factors have led to the need to develop generic models for wind farms that can be used in studies by planners and protection engineers. The current practice for short circuit modelling of wind farms in the power industry is to utilize transient stability programs based on either simplified electromechanical fundamental frequency models or detailed electromagnetic time domain models. The fundamental frequency models are incapable of representing the majority of critical wind generator fault characteristics, such as during power electronic switching conditions and sub-synchronous interactions. The detailed time domain models, though accurate, demand high levels of computation and modelling expertise. A simple yet accurate modelling methodology for wind generators that does not require resorting to fundamental frequency based simplifications or time domain type simulations is the basis for this research work. This research work develops an average value model and a dynamic phasor model of a Type 3 DFIG wind farm. The average value model replaces the switches and associated phenomena by equivalent current and voltage sources. The dynamic phasor model is based on generalized averaging theory, where the system variables are represented as time varying Fourier coefficients known as dynamic phasors. The two types models provide a generic type model and achieve a middle ground between conventional electromechanical models and the cumbersome electromagnetic time domain models. The dynamic phasor model enables the user to consider each harmonic component individually; this selective view of the components of the system response is not achievable in conventional electromagnetic transient simulations. Only the appropriate dynamic phasors are selected for the required fault behaviour to be represented, providing greater computational efficiency than detailed time domain simulations. A detailed electromagnetic transient (EMT) simulation model is also developed in this thesis using a real-time digital simulator (RTDS). The results obtained with the average value model and the dynamic phasor model are validated with an accurate electromagnetic simulation model and some state-of-the-art industrial schemes: a voltage behind transient reactance model, an analytical expression model, and a voltage dependent current source model. The proposed RTDS models include the effect of change of flux during faulted conditions in the wind generator during abnormal system conditions instead of incorrectly assuming it is a constant. This was not investigated in previous studies carried out in the real-time simulations laboratory at the University of Saskatchewan or in various publications reported in the literature. The most commonly used LVRT topologies, such as rotor side crowbar circuit, DC-link protection scheme, and series dynamic braking resistance (SDBR) in rotor and stator circuits, are investigated in the short circuit studies. The RTDS model developed uses a multi-mass (three-mass) model of the mechanical drive train instead of a simple single-mass model to represent torsional dynamics. The single mass model considers the blade inertia, the turbine hub, and the generator as a single lumped mass and so cannot reproduce the torsional behaviour. The root cause of sub-synchronous frequencies in Type 3 wind generators is not well understood by system planners and protection engineers. Some literature reports it is self excitation while others report it is due to sub-synchronous control interactions. One publication in the stability literature reports on a small signal analysis study aimed at finding the root cause of the problem, and a similar type of analysis was performed in this thesis. A linearized model was developed, which includes the generator model, a three mass drive train, rotor side converter, and the grid side converter represented as a constant voltage source. The linear model analysis showed that the sub-synchronous oscillations are due to control interactions between the rotor side controller of the Type 3 wind power plant and the series capacitor in the transmission line. The rotor side controls were tuned to obtain a stable response at higher levels of compensation. A real-time simulation model of a 450 MW Type 3 wind farm consisting of 150 units transmitting power via 345 kV transmission line was developed on the RTDS. The dynamic phasor method is shown to be accurate for representing faults at the point of interconnection of the wind farm to the grid for balanced and unbalanced faults as well as for different sub- synchronous oscillation frequencies