Biomass Energy Sources
Ravi Kumar 9494755058 K; Murali Krishna MVS; SUDHEER PREM KUMAR B
Abstract
Due to their availability and environmental concerns, waste plastic, which contains a lot of hydrocarbons with high calorific value, makes suitable alternative fuels. Pyrolysis oil from discarded plastics can fuel diesel engines without modification. The performance, combustion, and emissions of waste ...
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Due to their availability and environmental concerns, waste plastic, which contains a lot of hydrocarbons with high calorific value, makes suitable alternative fuels. Pyrolysis oil from discarded plastics can fuel diesel engines without modification. The performance, combustion, and emissions of waste plastic oil bio-diesel blend were tested on a single-cylinder, CRDi vehicle research engine with an open ECU. The test varied engine speed (1500, 2000, 2500 rpm) and load (low, medium, full). Waste plastic oil (WPO) blended with pure diesel fuel in 10%, 20%, and 30% volumes and compared to diesel. Engine speeds increased cylinder pressure and brake thermal efficiency. The findings demonstrate that the thermal efficiency of all waste plastic oil blends is lower compared to diesel across all loading conditions. Specifically, at full load, the peak cylinder pressure, heat release, combustion duration, and ignition delay were higher for plastic oil and its blends compared to diesel. The engine running on waste plastic oil experienced a roughly 6% increase in peak pressure but exhibited lower thermal efficiency. These test results highlight the significant impact of the fuel's physical properties on combustion characteristics. In addition, it is observed that increase in Nitrogen oxides (NOx) emission and low brake specific fuel consumption with respect to the speed. The utilization of WPO with diesel up to 20% in the blend can be used in diesel engines with a slight increase in emission of Carbon monoxide (CO) at higher loads.
F. Salek; Alireza Eskandary Nasrabad; M. M. Naserian
Abstract
In this paper, a novel thermal driven supercharging system for downsizing of a turbocharged diesel engine is proposed. Furthermore, Kalina cycle has been used as waste heat recovery system to run the mounted supercharging system. The waste heat of air in engine exhaust and intake pipes is converted to ...
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In this paper, a novel thermal driven supercharging system for downsizing of a turbocharged diesel engine is proposed. Furthermore, Kalina cycle has been used as waste heat recovery system to run the mounted supercharging system. The waste heat of air in engine exhaust and intake pipes is converted to cooling and mechanical power by Kalina cycle. The mechanical power produced by Kalina cycle is transferred to an air compressor to charge extra air to the engine for generating more power. This feature can be used for downsizing the turbo-charged heavy duty diesel engine. In addition, the heat rejected from engine intercooler is transferred to Kalina cycle vapor generator component, and part of engine exhaust waste heat is also used for superheating Kalina working fluid before entering engine. Then, first and second law analysis are performed to assess the operation of the engine in different conditions. Moreover, an economic model is provided for the Kalina cycle which is added to engine as supplementary component. Finally, simple payback and Net present value methods are used for economic evaluation of the added supplementary system. According to the results, mounting the novel waste heat driven air charging system has resulted in increment of air mass flow rate which leads to extra power generation (between 9 kW and 25 kW). The payback period and profitability index of the project are approximately 3.81 year and 1.26, consecutively.