Abstract
In energy recovery technology, via municipal solid waste (MSW) as an energy resource; the capacity of the power plant required can be designed, if the potentials of the heat and electrical energy of the waste to be combusted has been established. Conversely, in this research, the amount of power potential of the waste required as fuel, is determined through the design for the capacity of the steam power plant that will utilize municipal solid waste as an energy resource. The capacity of the power plant is designed, using single reheat Rankine cycle. The pressure and temperature selected for the design of the boiler is 30 bar and 400 °C, the pressure at the reheat tube is 6 bar, and the pressure at the condenser is 0.032 bar. The heat supplied to the boiler is calculated to be 3639.2 kJ/kg, the total work-output of the turbine is 1451.4 kJ/kg and the heat rejected at the condenser is 2187.6 kJ/kg. The quantity of MSW required is predicted to be 418 MJ/kg based on the calorific value of 20 MJ/kg, and its heat energy and electrical power potentials is predicted to be 2.3 GWh and 29 MW respectively while the grid to power is 20 MW.
Highlights
Municipal solid waste (MSW) production is a constant phenomenon in the daily activities of man as he interacts with his environment [1]
According to [3], municipal solid waste (MSW) is referred to as discarded materials which include food residues, bottles, packaging box, cans, rags, grass and garden trimmings, damaged furniture, papers, electronics and electrical appliances; that are generated by man as he interacts with his surrounding on daily activities
Municipal solid waste management (MSWM) is defined [4], as a systematic method by which activities involved in planning, storing, collecting, transporting, processing and disposal of MSW are coordinated and funded. [2] stated that the most effective and sufficient method of waste management, is the energy recovery option; according to [5], WTE option, will serve a dual purpose of efficient waste management and energy recovery for heating and power generation
Summary
Municipal solid waste (MSW) production is a constant phenomenon in the daily activities of man as he interacts with his environment [1]. The capacity of the bio-waste fired power plant to convert the waste to electrical power can be determined if the quantity of MSW available for energy generation and its heating value are known. The quantity of waste required to be converted to energy, can be established by first determining the capacity of the required power plant, if the expected steam mass flow rate of the plant boiler is selected. The electrical power potential of the required MSW is determined using the steam flow rate of the power plant, the heating value, and the power potential of the waste are input into the power potential mathematical model to obtain the quantity of the waste required for power generation. The waste-to-energy (WTE) system envisaged in predicting the amount of MSW to be converted, is incineration of MSW as solid fuel, to produce steam in a boiler to drive the turbine of a power plant; which drives a generator connected to it through a shaft to produce electricity
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