<![CDATA[National waste generation continues to increase each year, and a large proportion remains inadequately managed. One applicable treatment alternative is thermal processing using an incinerator, which produces heat energy that can potentially be utilized as an energy source for a boiler to generate steam. This study aims to obtain a conceptual design of a water tube boiler integrated with an incinerator with a capacity of 100 kg/h and to evaluate its structural strength through Finite Element Analysis (FEA)-based simulation. The methods used include energy balance calculation, heat transfer analysis, determination of the main dimensions, geometric modeling, and static structural simulation using SolidWorks software, with AISI 304 material and an operating pressure of 4 bar. The calculation results show that the available combustion heat energy is 680,000 kJ/h, with the boiler capacity set at 40 kg/h. The required heat transfer area is met using five heating tubes with a natural circulation system, and the maximum allowable working pressure (MAWP) is 1.156 MPa. The simulation results show a maximum von Mises Stress of 71.248 MPa at the junction between the drum and the water pipe, a maximum displacement of 0.217 mm, and a minimum Factor of Safety of 2.903, indicating that the structure is able to withstand the operating pressure. Based on the design and simulation results, the designed water tube boiler meets the specified capacity requirement and has adequate structural strength.]]>
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