International Journal of Engineering and Information Systems (IJEAIS)   Year: 2022 | Volume: 6 | Issue: 5 | Page No.: 17-22 Numerical Approach for Estimating the Length of Boiler Tube for a Small Scale Solid Waste Fired Steam Boiler Download PDF Olisa Yemi, Fadayini Oluwafemi and Kotingo Kelvin Abstract: The design calculation of any mechanical system often appears tedious, time consuming and demand enormous mathematical skill if it is intended to be solved using analytical method. This paper presents the Design Calculation of a small scale solid waste fired steam boiler using Numerical Method. This method provides an approach for solving physical or mathematical equation using a computer software by creating a specific algorithm. Matrix Laboratory (MATLAB) software was used to implement the algorithm created, detailing the design of the economizer, evaporator and the super heater. MATLAB Code was developed for estimating the length of tube required to produce steam for a given design parameters specifying temperature, pressure and steam flowrate. Initial design values were entered and computation was done for the following parameters: heat transfer coefficient, flue gas mass velocity, resistance to heat transfer, log mean temperature difference, convective boiling heat transfer coefficient and nucleate boiling suppression factor. The result of the computation reveals that for a specified temperature of 150oC and a pressure of 5 bar with a mass flow rate of 1.5 kg/, the total length of the economizer, evaporator and superheater required is 82.3 m.