RSM based Modeling and Investigation of Emission Characteristics on Cotton-Seed Oil Biodiesel

Abstract

The biodiesel is the most promising fuel for IC engines as they have the higher calorific value and lower emission quantities. The use of biodiesel in the existing and new engines will increase the performance and reliability of the engine. Once the biodiesel is synthesised and produced in a bulk, it will minimize the cost of biodiesel and it will be lesser than the cost of regular diesel. The use of biofuel with diesel will be prominent as they can produce good performance when combined. In this research work, biodiesel from cotton seed is extracted and transestrified into usable and combustible fuel (COME). To test and improve performance of the COME it has been combined with the diesel in different proportions and prepared as biodiesel (COME-Diesel blends). The blends are tested and compared for various properties to identify the combustion characteristics. The blends are used and tested on the VCR engine to determine the performance and emission characteristics. To develop an empirical model for the emission characteristics, response surface methodology (RSM) design matrix is developed such that the blend, compression ratio, load and speed are the variables and NO and HC are the response functions. The RSM design matrix is experimented and to determine the empirical models, results are verified through the experimental results.

Experimental analysis on the influence of compression ratio, flow rate, injection pressure, and injection timing on the acetylene — diesel aspirated dual fuel engine

“…Decrease in the HC emission compared to diesel is 2.5%, 25% and 30% by 2, 4 and 6Lpm acetylene gas velocities in diesel-acetylene DF mode, on the maximum loading condition. Gaseous HC present in the boundary layer that is stagnant surrounding the wall of engine cylinder at low temperatures and in crevices due to lack of ame propagation could be the reason for unburnt HC emissions (Ramachandran, T et al, 2020). Because of broader combustion restrictions, higher combustion speed, lean engine running, and speci c power for acetylene, HC emissions are reduced with the gradual rise in load (Lakshmanan and Nagarajan, 2011a).…”