Rajsekhar Panua

An experimental study of performance and emission parameters of a compression ignition engine fueled by different blends of Diesel-Ethanol-biodiesel

The effects of different ethanol-diesel blended fuels on the performance and emissions of diesel engines have been evaluated experimentally and compared in this paper. After series of miscibility tests, it was found that ethanol is not miscible in diesel beyond 10% concentration. In order to increase its miscibility, Pongamia piñata methyl ester (PPME), popularly known as biodiesel was added as an amphiphilic agent. Different concentrations of ethanol and biodiesel produced different blends from which 4 blends were chosen for engine testing. The results indicated that biodiesel inclusion in the blends increased the brake thermal efficiency and reduced the fuel consumption of the engine. The study of emission parameters also showed that diesel ethanol blends reduced NOx and CO2 emission but increased hydrocarbon emission with elevated exhaust smoke opacity. It was also noticed that biodiesel inclusion in the blends reduced hydrocarbon emission, reduced exhaust smoke opacity with the penalties of simultaneous increase in NOx and CO2 emission.

Thermodynamic analysis and cogeneration of a cement plant in India-A case study

In the present paper the thermodynamic analysis of a cement plant located in Barak Valley has been carried out. The analysis can be used as a precursor to achieve the basic objectives of any cement plant i.e. minimizing energy consumptions, minimizing the cost of production, and maximizing plant productivity. A simple model has been developed on the basis of mass and energy balance and has been applied to BVCL. The various performance parameters of the different components have been evaluated by making use of data collected over a year and First law efficiency of kiln system has been estimated. A heat recovery steam power plant has been proposed for the generation of electricity, which utilizes the waste heat of this plant. The capacity of the steam power plant has been estimated.

Design of Reactive Muffler for Study on the Noise Level and Performance of a Two Cylinder Four Stroke 16 h.p Diesel Engine

Exhaust noise from internal combustion engine is most harmful. However this noise can be reduced sufficiently by means of a well designed muffler. Suitable design and development will help to reduce the noise level, but at the same time the performance of the engine should not be hampered by the back pressure caused by the muffler. The authors designed and fabricated a reactive muffler and afterward compared the noise level, Brake thermal efficiency and Brake Specific Fuel Consumptions with the existing muffler and the modified designed and fabricated muffler.

Control of S.I. Engine Exhaust Emissions Using Non-Precious Catalyst (ZSM-5) Supported Bimetals and Noble Metals as Catalyst

Three Way Catalysts (TWC) are extensively used for simultaneous control of three principal automotive pollutants, namely carbon monoxide (CO), Oxides of nitrogen (NOx), and hydrocarbon (HC). Most of works on three way catalytic converter have been carried out with noble metals such as Platinum, Rhodium, and Iridium have been tried individually and in different combinations and proportions. Noble metal catalysts give very good performance of reduction of (NOx), CO and HC in the narrow range of stoichiometric Air Fuel ratio. Noble metals are costly and not abundantly available. These draw backs of the noble metal catalysts have inspired to search for the alternative catalysts, which will perform well over the wide range of A/F ratio and are economical and abundantly available. This paper discusses the processing of ZSM-5 to Cu-Ion- Exchanged ZSM-5, ZSM-5 supported Cu-Pt bimetallic catalyst and Cu-Rh bimetallic catalyst and placing them in a three staged converter to study the reduction efficiencies of exhaust emissions CO, NOx, and HC in a 800 cc Maruti S. I. Engine. The experiments are carried out at 1500 rpm, 17.6 A/F ratio, different catalyst bed temperatures and different engine loads 0%, 17.5%, 35%, 52.5%, and 70% of full load. The results achieved are the maximum reduction of CO 90% at 375 °C NOx 90% at 375 °C and HC 61% at 380 °C. The same engine was also run for Noble metal converter (NMC) (EURO-II) purchased from an authorized Maruti distributor and the maximum reduction achieved were CO 89% at 375° C, NOx 91% at 375° C, and HC 70% at 390° C comparable to Zeolite Catalytic Converter (ZCC).Copyright