Shivani Engineering College

About: Shivani Engineering College is a based out in . It is known for research contribution in the topics: Diesel fuel & Diesel engine. The organization has 8 authors who have published 13 publications receiving 224 citations.

Performance and exhaust emission characteristics of a CI engine fueled with biodiesel (fish oil) with DEE as additive

Abstract: Oil provides energy for 95% of transportation and the demand of transport fuel continues to rise. According to the assessment of IPCC (International Panel on Climate Change) to climate change, global oil demand will rise by 60% from 75 Mb/d in 2000 to 120 Mb/d in 2030. Almost three quarter of the increase in demand will be form the transport sector. Oil will remain the fuel of choice in road, sea and air transportation. Our country being a developing country, the increase in demand in our country for oil for use in the transport sector will grow at a much higher rate. All countries including India are grappling with the problem of meeting the ever increasing demand of transport fuel with the constraints of international commitments, legal requirements, environmental concerns, and limited resources. In this context transport fuels of biological origin have drawn a great deal of attention during the last two decades. Biofuels are renewable liquid fuels coming from biological raw materials and have been proved to be good substitute for oil in the transportation sector. As such Biofuels ethanol and Biodiesel are gaining world wide acceptance as a solution for problems of environmental degradation, energy security, retracting imports, rural employment and agricultural economy. With a view to add Bio-Fish Oil to the list of biodiesel, experimental studies were made using this bio oil in a single cylinder diesel engine and generator set as substitute for diesel fuel and the results are discussed. It is also blended with oxygenate and EGR technique also used to improve the performance and reduce the emission of the engine. Encouraging results were obtained from this investigation. The percentage reduction is CO – 91%, CO2 – 62%, NOx – 92% and CxHy – 90% were attained when the engine was run at maximum load using BFO with 2% additive with EGR and there was reduction in all the percentages when the engine was run in other loads also. In the case of NOx, there was an increase of this emission by about 48% in the maximum load with BFO when compared with diesel, for obvious reasons and that was also reduced because of the addition of oxygenates and EGR technique. The optimum values were obtained with 2% of additive. When this percentage is increased or decreased the emission were increased.

Development of Operational Policy for a Multi-reservoir System in India using Genetic Algorithm

Abstract: A genetic algorithm (GA) and a backward moving stochastic dynamic programming (SDP) model has been developed for derivation of operational policies for a multi-reservoir system in Kodaiyar River Basin, Tamil Nadu, India. The model was developed with the objective of minimizing the annual sum of squared deviation of desired target releases. The total number of population, crossover probability and number of generations of the GA model was optimized using sensitivity analysis, and penalty function method was used to handle the constraints. The policies developed using the SDP model was evaluated using a simulation model with longer length of inflow data generated using monthly time stepped Thomas–Fiering model. The performance of the developed policies were evaluated using the performance criteria namely, the monthly frequency of irrigation deficit (MFID), Monthly average irrigation deficit (MAID), Percentage monthly irrigation deficit (PMID), Annual frequency of irrigation deficit (AFID), Annual average irrigation deficit (AAID), and Percentage annual irrigation deficit (PAID). Based on the performance, it was concluded that the robostic, probabilistic, random search GA resulted in better optimal operating policies for a multi-reservoir system than the SDP models.

Evaluation of natural gamma radiation and absorbed gamma dose in soil and rocks of Perambalur district (Tamil Nadu, India)

Abstract: The activity concentrations and absorbed gamma dose of primordial radionuclides 238U, 232Th and 40K were determined employing γ-ray spectrometry in 31 soil samples from the land area earmarked for house construction in Perambalur district and 14 rock samples from quarries that supply stones for the entire district. The soil samples registered relatively a higher mean value of 13.2 Bq kg−1 for 238U, 66 Bq kg−1 for 232Th and 340.3 Bq kg−1 for 40K as compared to mean values for rock samples (238U—8.0 Bq kg−1; 232Th—65.1 Bq kg−1; 40K—199.1 Bq kg−1). The mean absorbed gamma dose rate for soil (61.4 nGy h−1) marginally exceeded the prescribed limit of 55 nGy h−1 while, rocks registered the mean absorbed gamma dose rate of 10.4 nGy h−1. The mean radium equivalent activity was distinctly higher in soil (130.6 Bq kg−1) than in rock (20.0 Bq kg−1). However, these values were lower than the limit (370 Bq kg−1) set by OECD for building materials. It is evident from the data that the soil and rocks do not pose any radiological risk for house constructions in Perambalur district.

A numerical study on effect of temperature and inertia on tolerance design of mechanical assembly

Abstract: Purpose – Due to technological and financial limitations, nominal dimension may not be able achievable during manufacturing process. Therefore, tolerance allocation is of significant importance for assembly. Conventional tolerance analysis methods are limited by the assumption of the part rigidity. Every mechanical assembly consists of at least one or more flexible parts which undergo significant deformation due to gravity, temperature change, etc. The deformation has to be considered during tolerance design of the mechanical assembly, in order to ensure that the product can function as intended under a wide range of operating conditions for the duration of its life. The purpose of this paper is to determine the deformation of components under inertia effect and temperature effect.Design/methodology/approach – In this paper, finite element analysis of the assembly is carried out to determine the deformation of the components under inertia effect and temperature effect. Then the deformations are suitably i...