Browsing by Author "Muhammad Usman Ansari"

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    Design and optimization of a double jacketed kettle with integrated gas geyser to enhanced heating performance
    (UMT Lahore, 2024-08-19) Husnain Sajjad; Syed Hamza Gillani; Muhammad Usman Ansari
    Due to rising cost of the energy, many industries like food processing industries, pharmaceutical and chemical industries among others have directed their operations in looking for efficient and sustainable energy hence raising an eyebrow on what is considered by many as an effective wood fired heating system due to its hugeness impacts both socially and fiscally. Conventional approaches to steam heating systems have proven vitality, but, unfortunately, they demand a lot of energy and costs will be high; hence, new strategies are required. This project seeks to improve the efficiency of heating jacketed kettles by replacing the steam heating system by hot water system from gas geysers. Gas geysers are characterizing by a rapid and constant heat output that guarantees the population access to a stable energy source. Through use of gas geysers to warm water, which warms the kettles the project strives at maximizing the advantage of thermal energy in procedures. The design of the system, including the heat exchanger and control strategies, has thoroughly examined. Through modeling and analysis, the thermal, economic, and environmental performances are evaluating. The findings indicate that this gas geyser-based hot water system offers a practical solution for industries with high thermal energy demands, resulting in improved operational costs and lower carbon emissions compared to conventional steam heating methods.
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    Effect of cyclic wetting and drying on hydraulic and volume change behaviors of compacted swelling clay
    (UMT.Lahore, 2023) Hamza Islam; Muhammad Usman Ansari; Abubakar Liaqat; Noman Ahmad Mujtaba Khan
    A profound knowledge of how compacted expansive soils behave in field conditions is essential because of their widespread utilization in engineering applications. This study presents the effect of stress and boundary conditions, either independently or in combination, on the hydraulic and volume change behavior of highly compacted swelling clay. A series of axial stress states ranging from 26 kPa to 1000 kPa were applied through cyclic wetting and drying (CWD) method while taking into account two boundary constraints, namely constant stress (CS) and constant volume (CV). The initial soaking and drying cycle showed the most substantial effect of the CWD process on the hydraulic and volume change behavior of expansive soil. Under CS conditions, the CWD process resulted in the accumulation of shrinkage as well as a reduction in saturated hydraulic conductivity (ksat). In contrast, under CV conditions, the CWD process led to a decrease in swelling pressure, with minimal influence on ksat. A prominent elastic response to the CWD process was observed after the completion of second cycle and start of the third cycle. For instance, the third to fourth cycle for volume change potential under CV conditions, and the fourth to fifth cycle for volume change potential under CS conditions. Furthermore, it was also concluded that swelling pressure (Ϭs) and ksat are not inherent properties of expansive soil, but rather are affected by iiia variety of variables such as stress levels, boundary conditions, and wetting conditions.