Design of upi incinerator heat-electricity conversion system by applying classic rankine cycle

Abstract

UPI has successfully developed a smokeless incinerator. Incinerator combustion occurs at high temperatures. High temperature is the potential energy that can be converted into electricity. The innovation space is still open here to increase the ability of the UPI incinerator to become part of a system that can generate electricity by utilizing the burning of waste that occurs in the incinerator. This conversion system uses the Rankine Cycle. The Rankine cycle utilizes water as its working fluid. This research is targeted to get the design of an incinerator heat energy conversion system into electricity by using classical basic Rankine cycle. The investigation will vary three different pumps to get the best performance. The performance parameter are the cycle thermal efficiency and net power produced by the cycle. The design process starts with the calculation of potential heat from waste combustion. The calculation uses the LHV value of municipal solid waste and the second heat source comes from reaction of LPG which consists of 48.5% propane, 48.5% butane and 3% pentane and air which consists of 79% Nitrogen and 21% Oxygen. The reaction is assumed perfect and Nitrogen is not reacted. Total heat is 581.4 kW which comes from 574 kW from LHV of municipal waste and 7.76 kW from the reaction of LPG and air. The heat transferred to work fluid comes from 50% LHV of municipal waste and 14% from the reaction of LPG and air. The cycle can produce 55.5 kW power and the efficiency is 13%. The cycle use 600W water pump with 8 liter/min debit. Debit is the important parameter to get better power output and efficiency from heat of incinerator waste combustion.