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List of products by author: S. Upadhya
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Mass transfer modelling of hydrogen sulphide (H2S) generated in London Tideway Tunnels (LTT): A new methodology for...
Abstract: The LTT aims to capture flows from combined sewer overflows (CSOs) which presently discharge combined sewage over 50 times in a typical year into the tidal Thames. When the LTT fills, the displaced air is treated and exhausted via ventilation stacks located at the shafts to the tunnels. The incoming sewage contains sulphides, which is transferred from the liquid to the gas phase generating H2S...
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Ventilation options for short tunnels - Sustainability, OPEX and Cost Implications
Abstract: Tunnel ventilation provisions in road tunnels are well understood, and international norms have been developed over many years. There are three main ways to ventilate a road tunnel: natural, longitudinal, or transverse, with different options suited to varying tunnel geometries and operational configurations. Each of these systems has its space proofing and CAPEX/OPEX implications. One key...
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