Papers by Kailasnath Sutar
Desalination using solar stills: A review
Environmental Progress & Sustainable Energy
Clean cooking with downdraft biomass gasifier cookstove: Effect of gasifier performance
Energy
Energy Efficiency, Emissions and Adoption of Biomass Cookstoves
Energy Efficiency [Working Title]
Indoor air pollution due to inefficient use of solid biomass fuels in traditional cookstoves caus... more Indoor air pollution due to inefficient use of solid biomass fuels in traditional cookstoves causing serious threat to human health and millions of deaths, mainly in developing countries. This chapter reports parameters for measurement of thermal as well as emission performance of biomass cookstoves. The thermal performance parameters include fire power, efficiency, specific fuel consumption and turn-down ratio whereas the emission performance parameters include emission factor or indoor concentration of a pollutant. This chapter also reports about technological improvements in the biomass cookstoves. Since early 1980s, efforts were made by the researchers for development improved cookstoves. These efforts include use of metals as cookstove materials, provision of grate for better air circulation, air preheating, provision of swirl and secondary air, provision of insulation, use of chimney, baffles etc. The improved cookstoves were found to be causing saving in biomass fuel but ther...
Experimental investigation on pot design and efficiency of LPG utilization for some domestic cooking processes
Energy for Sustainable Development, 2020
Abstract Liquefied petroleum gas (LPG) is considered to be a clean burning domestic cooking fuel ... more Abstract Liquefied petroleum gas (LPG) is considered to be a clean burning domestic cooking fuel across the world. The Government of India is promoting use of LPG as cooking fuel among Indian population. Refilling of LPG is not affordable to poor families. It is difficult for the Government to reduce price of LPG cylinders. In such a situation, to make LPG affordable, it is necessary to investigate methods for efficient utilization of LPG. The present work reports results of laboratory experiments conducted to investigate the best combination of pot size for common cooking processes viz. heating of a milk, making of a tea and cooking of a rice. For each type of cooking process, the amount of food items are decided as per need of a family of four members, based on the survey conducted in eighty households. Four types of pots are selected for each type of cooking process and three settings of flame of a smaller burner of domestic LPG stove viz. high, medium and low are used. Each experiment is repeated thrice and uncertainty analysis is conducted using Student's t-test. Based on the experimental results, recommendations are given regarding use of pot size.
Journal of emerging technologies and innovative research, 2018
This paper describes the simulation study of the INDTH 4412 wind turbine airfoil at angle of atta... more This paper describes the simulation study of the INDTH 4412 wind turbine airfoil at angle of attack 0 to 15, keeping velocity constant. The aerodynamics of the airfoil which is used for wind turbine blade has a striking influence on the overall aerodynamic efficiency of wind turbine. Geometric modelling of the airfoil and its CFD simulation is carried out on ANSYS Fluent. For a computational domain, separate faces of enclosure were projected and edge meshing was selected in a manner to create fine mesh near the airfoil.
Survey for Analyzing Domestic LPG Utilization Trends in Households of Pune Region
Imperial journal of interdisciplinary research, 2016
Efficient utilization of various fuels is an important task in front of human beings. If we use t... more Efficient utilization of various fuels is an important task in front of human beings. If we use these fuels efficiently then only we can extend the life of these resources. LPG is one of the most important cooking fuels in urban population. In different region of India LPG utilization trends are different. The aim of present work is to study the different trends of domestic LPG utilization in the Pune region. The first task is to conduct surveys in LPG using households to investigate trends in utilization of LPG across different families and second task consist analysis of dimensions of the pots used for different cooking cycles viz. rice making, boiling of milk and making of tea .
Indian Journal of Science and Technology, 2021
Objectives: To perform computational studies on different combinations of plate fin arrays of dif... more Objectives: To perform computational studies on different combinations of plate fin arrays of different shapes for studying their performance in natural convection heat transfer. To compare the heat transfer performance of uniform notched fins with hybrid notched fins and also performance of normal notched fins with inverted notched fins. Methods: SolidWorks Flow Simulation software is used for the present computational studies. Three types of vertical plate fin arrays viz. plain rectangular fin, rectangular fin with square notch and rectangular fin with semi-circular notch are used with their seven combinations. These fin array combinations are: plain rectangular, rectangular square notched, rectangular semi-circular notched, rectangular inverted square notched, rectangular inverted semi-circular notched, hybrid rectangular square-semi-circular notched and hybrid rectangular inverted square-semi-circular notched. Findings: The highest average heat transfer coefficient of 7.82 W/m 2 K is found to be for inverted hybrid square-semicircular notched fin array. This value of heat transfer coefficient is about 8% higher than compared to that with plain rectangular plate fin array (7.25 W/m 2 K) subjected to same operating conditions. Average heat transfer coefficients for inverted plate fin array combinations are high as compared with the non-inverted combinations. Also, hybrid plate fin arrays, whether inverted or not, show higher heat transfer coefficient values as compared with uniform notched fin arrays. Novelty : Seven types of plate fin array combinations are studied computationally. SolidWorks Flow Simulation software is used very effectively for this 3D CFD analysis. The behaviour of fluid i.e. air during natural convection flow is studied using air flow velocity trajectories. Surface contours are effectively used for studying variation in surface temperature and heat transfer coefficient at all locations of fin arrays.
Imperial journal of interdisciplinary research, 2016
This paper describes the simulation study of the different airfoils for small horizontal axis win... more This paper describes the simulation study of the different airfoils for small horizontal axis wind turbine rotor blades. The simulation is carried out for low wind speed and low Reynolds number 5, 00,000. Blade Element Momentum Theory is used to design rotor blades. Airfoils are simulated in QBlade where each airfoil is considered individually for entire blade span. Rotor was designed for 3 blades having 2 m rotor diameter and tip speed ratio of 7. Four different airfoils viz. DU86-084, E387, SD2030, SG6041, were considered and compared for different parameters. In addition 360° polar extrapolation is plotted for all airfoils and how QBlade can be used effectively for simulation is described
In this paper the numerical analysis study of the effect of almond shaped dimple at four angles o... more In this paper the numerical analysis study of the effect of almond shaped dimple at four angles on a flat plate is carried out. The heat transfer augmentation is studied by the changes in Nusselt number and friction factor. The numerical analysis is done in ANSYS Fluent. The turbulence model for CFD analysis is chosen after performing validation by the experimental and theoretical results for heat transfer augmentation in flat plate. The experiment is done to study heat transfer enhancement on a plat plate with dimples in a rectangular duct. The heater is provided below the test plate to provide constant heat to the plate. The heat flow characteristics of air after heating in the duct are studied for the enhancement of heat transfer. Because of the vortex generation and flow separation inside the dimples the heat transfer is increased. The analysis is done on dimples at four angles (0°, 90°, 180°, 270°). The maximum heat transfer enhancement is found in 270° dimpled plate. The least...
Indian Journal of Science and Technology, 2021
Objectives: To design a blade profile suitable for a micro-capacity wind turbines. To analyze the... more Objectives: To design a blade profile suitable for a micro-capacity wind turbines. To analyze the performance of a new blade profile in terms of lift to drag ratio using simulation software such as QBlade and ANSYS Fluent CFD. Methods: A new airfoil for a micro capacity horizontal axis wind turbine is designed using QBlade software. A 3D model of the airfoil is prepared using CATIA. 2D and 3D CFD simulations of this airfoil are carried out using ANSYS Fluent and the simulation results are compared with those obtained from QBlade. Findings: It is found that QBlade results for the lift to drag ratio fairly match with the experimental results at all values of angles of attack (0 • to 20 •). 3D CFD results also fairly match with experimental results at lower values of angles of attack (0 • to 3 •). The optimum value of lift to drag ratio is obtained for the angle of attack of 3 •-4 •. 3D CFD simulation under predicts lift to drag ratio at higher angles of attack as compared to the experimental values. Novelty: The study reports simulation results for an airfoil blade profile of a micro-capacity wind turbine using both QBlade and ANSYS Fluent CFD (both 2D and 3D). The simulation results fairly match with the available experimental results.
Some Issues in Testing of Biomass Cookstoves
Proceeding of Proceedings of the 24th National and 2nd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2017), 2018
Energy, 2017
Developed a design methodology for small downdraft gasifiers by adapting guidelines meant for l... more Developed a design methodology for small downdraft gasifiers by adapting guidelines meant for larger gasifiers. Developed two prototypes of gasifiers: 4 kW th and 2.5 kW th with gasification efficiency ~80%. Reactor temperature and total particle surface area available for reactions affect the gasifier performance. The optimal gasification air flow rate and particle size for best gasification efficiency have been explained using the above. Producer gas versus air flow rate gives a single straight line for different gasifiers, fuel types and sizes.
Design of a partially aerated naturally aspirated burner for producer gas
Energy, 2016
This article presents a detailed methodology for the design of a partially aerated naturally aspi... more This article presents a detailed methodology for the design of a partially aerated naturally aspirated burner used for combustion of the producer gas generated in a downdraft gasifier cookstove. The main difference between an LPG burner and producer gas burner is that the former uses a high velocity jet of gas at ambient temperature whereas the latter uses a low velocity, high mass flow rate, buoyant jet of gas at 100–300 °C. Due to the elevated temperatures, buoyancy force plays an important role in entraining combustion air into the burner for producer gas. This has been accounted for in the new methodology, developed based on the design procedure available in the literature for hydrocarbon fuels. A mathematical model for fluid flow and heat transfer through the burner has been developed to predict percentage of primary aeration in the burner at different producer gas flow rates. The pressure drops predicted by the model have been validated using experimental measurements. The predictions of the model have been used to corroborate the assumptions and heuristics used in the design methodology. The predictions have also been used to demonstrate the importance of considering buoyancy in burner design, by comparing with a burner designed ignoring buoyancy. With the use of the newly designed burner, the thermal efficiency of the gasifier cookstove was found to improve substantially. Carbon monoxide (CO) emissions from the cookstove using this burner were also found to be within the limits (<5 g/MJd) recommended in the Indian Standards for cookstoves.
Biomass cookstoves: A review of technical aspects
Renewable and Sustainable Energy Reviews, 2015
Improving the thermal as well as emissions performance of biomass cookstoves has been of interest... more Improving the thermal as well as emissions performance of biomass cookstoves has been of interest to researchers for a long time. Despite there being a vast literature on the subject, several technical issues remain unresolved with a variety of data and opinions being presented. The present article aims at bringing together literature spanning over three decades that addresses technical aspects of biomass stoves, i.e., their design, analysis and testing. Literature on various design principles, features which determine the stove performance and different methods of performance prediction have been reviewed. Different cookstove testing protocols have been compared and various issues related to cookstove testing are critically discussed. The results of laboratory and field studies on cookstoves by various researchers are presented. Literature on health impact of cookstoves, their dissemination and adoption has also been included. The focus has been on critically analyzing the findings presented by various researchers over the past 3–4 decades in the backdrop of the advancement of the state of knowledge in the area. Wherever conflicting findings were encountered, efforts have been made to reconcile the same using the understanding of the fundamental phenomena.
Laboratory and Field Performance of Two In-House Developed Metal Biomass Cookstoves
Advanced Engineering Forum
Present work reports thermal and emission performance of in-house developed natural and forced dr... more Present work reports thermal and emission performance of in-house developed natural and forced draft metal biomass cookstoves. Laboratory as well as field tests are performed on the cookstoves. Experiments are performed on natural draft metal cookstove in laboratory at different air supply hole openings. Decrease in average input power and average thermal efficiency is observed between 3.74-3.43 kW and 31.14-29.45% respectively. Variation in average emission factor for carbon monoxide (CO) is found to be between 3.5-9.9 g/MJd. Emissions of Oxides of Nitrogen (NOx) are found to be varying between 1 ppm to 13.5 ppm without any specific trend. Experiments are performed on forced draft metal cookstove in laboratory on two fan speeds. The average input power and average thermal efficiency vary between 3.4-3.0 kW and 36.9-42.5% respectively. Variation in average emission factor for CO is found to be between 1.8-4.5 g/MJd and that of average NOx emissions between 16.8-2.5 ppm.During field ...
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Papers by Kailasnath Sutar