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India is striving hard to develop new and renewable energy resources on a vast scale, to meet its future energy demands. To fulfill the need of renewable energy resources, utilization of wind energy is a good option to avoid several issues of pollution and climate change caused by the consumption of fossil fuels. The present study aims to provide a summary of offshore wind energy potential available...
Anaerobic co-digestion of corn stover (CS) and goose manure (GM) was carried out in the present study at four composition levels. Corn stover was pretreated to enhance its lignocellulosic digestibility. The NaOH pretreatment effect on the chemical composition of the corn stover was also determined and the methane production from all the composition levels was found significant (P < 0.05) as compared...
An alternative way has been proposed for the PVC-containing medical wastes valorization by co-hydrothermal carbonization (HTC) with lignocellulosic biomass. The organic-Cl in PVC can be converted to the inorganic-Cl via hydrolysis, defunctionalization, recondensation, and aromatization in the HTC process. Followed by the washing process with the condensed water, the inorganic-Cl with high water-solubility...
It is significant to increase energy efficiency of ethylene production process for petrochemical enterprise, in terms of the production level and productive benefits. But it is noticed from the actual production data that the energy efficiency of ethylene production has a strong relationship with the complex production conditions. It is necessary to combine the ethylene production states analysis...
The paper presents a methodology for determining the efficiency of a hydrogen generator taking the power requirements of its auxiliary systems into account. Authors present results of laboratory experiments conducted on a hydrogen generator containing a PEM water electrolyzer for a wide range of device loads. On the basis of measurements, the efficiency characteristics of electrolyzers were determined,...
Different concentrations (0.1 and 1 M K+/Na+) of salt solutions (K2CO3, Na2CO3, NaOH and NaCl) were used to impregnate alkali in sawdust. After devolatilization, char samples were gasified at different temperatures (750–900 °C) under CO2 in a macro-thermogravimetric analyzer for gasification kinetics. Morphologically, three classes of chars could be identified. Chars experiencing the highest catalytic...
Over a period of years, Maximum Power Point Tracking has become a mandatory requirement for Solar Photo Voltaic (PV) systems. Being dependent to environmental changes, the PV power constantly fluctuates due to change in irradiation. Under such conditions, large PV array connected in interconnection will experience non-uniform irradiation thus results multiple peaks in P-V characteristics. Although...
The complex dynamic behavior of nonlinear harvesters make it difficult to identify the optimum mechanical and electrical parameters for maximum output power, when compared to linear energy harvesting devices. In addition, the chaotic and multi-frequencies characteristics of responses under realistic human motion excitations provide additional challenges for enhancing the energy harvesting performance,...
In this study, the efficiency of a U-tube solar collector as a function of the concentration of Al2O3 nanofluid and the size of nanoparticles was investigated experimentally. Further, the efficiency of a U-tube solar collector with Al2O3 nanofluid as the working fluid was compared to that with water. The thermal conductivity of the Al2O3 nanofluid was found to increase with increase in its concentration...
Thermoelectric power generators are scalable and simple systems for recovering waste-heat disposed by the industry. We combine on-site measurements and a mathematical model to study the potential for power generation with this technology from heat available from casting of silicon. We implement a 0.25 m2 thermoelectric generator (TEG), based on bismuth-tellurium modules, in the casting area of a silicon...
This work investigates the design of large scale oxy-fuel circulating fluidized bed (CFB) boilers in two industrial pathways of constant thermal power scenario and constant furnace size scenario using a new version of a model validated with 100 kWth and 4 MWth oxy-fuel CFB boilers. This work suggests that the major approach for elevating the circulating solids flux is to utilize more efficient cyclones...
High capacity energy storage units are desirable to maintain power system stability in the presence of power disturbances produced by renewable energy sources and fluctuating load profiles. Battery energy storage systems may be used to smooth power flow, however, the frequent, deep charge and discharge cycling required dramatically reduces battery service life. A hybrid energy storage system (HESS)...
This paper investigates the integration of a district heating heat pump for the production of about 4.65 MWth with the drinking water network–playing the role of low temperature heat source -as an alternative to conventional fossil fuel heating. The heat recovery reduces water temperature from 15 °C to 12 °C, thus requiring partial reheating by the drinking water end-user that needs to be estimated...
This paper presents a novel ‘mix-mode’ energy management strategy (MM-EMS) and its appropriate battery sizing method for operating the microgrid at the lowest possible operating cost. The MM-EMS is developed by combining three proposed operating strategies, namely “continuous run mode”, “power sharing mode” and “ON/OFF mode” for a 24 h time period. The objective functions for the proposed strategies...
Tackling coal-burning industrial boilers is one of the key solutions to meeting the climate change and solving the environmental problem in China. Assessing the economics of various options to address coal-fired boilers is essential to identify cost-effective solutions. This paper discusses our work in conducting a comprehensive techno-economic analysis to evaluate various strategies for improving...
The objective of the present work is to study the temperature dependence of the flammability limits for pure compounds, and to develop a methodology to determine these limits in air at atmospheric pressure and at different initial temperatures of the mixture.A method to determine the lower flammability limits in those conditions was developed and compared with other methods available in the literature...
A North wall insulated greenhouse dryer was designed, fabricated and tested in no-load conditions under natural convection mode. Experiments were carried out in two different cases namely-Case-I and Case-II. Case-I was north wall insulated greenhouse dryer with solar air heating collector at ground and Case-II is north wall insulated greenhouse dryer without solar air heating collector. Convective...
Air staging strategy is a proven technology to provide efficient biomass combustion with less gaseous and particulate emissions. In this study, two different secondary air distribution modules are employed at two different axial positions from the bed surface in a 15 kW fixed-bed laboratory scale combustion system includes grate and underfeed bed stocker. The effects of air staging on temperature,...
The European Commission opened a discussion about limiting first generation food based biofuels in favour of advanced biofuels. The main reason was to limit the uncertainty in estimates of indirect land use change emissions (ILUC) of food based biofuels. Brown seaweeds represent a valuable solution. The lack of lignin makes them suitable for degradation processes such as anaerobic digestion (AD)....
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