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In this paper, a test rig for experimentation on a micro gas turbine is presented. The test rig consists of a micro gas turbine Solar T-62T-32, which, coupled with a 50 kVA alternator, can supply electrical energy to a calibrated resistive load bank. Particular attention is paid to the design of the inlet duct for the mass flow rate measurement. The basic issue was to create the intake duct for a micro gas turbine (MGT) test rig, in order to provide precise data about the mass flow rate and the thermodynamic air characteristics in the MGT inlet section. The inlet duct is also designed in order to allow future tests on inlet cooling technologies. The MGT is incorporated in a chassis for noise reduction, the dimensions of which are 540 mm (height), 570 mm (width) and 940 mm (length). These small dimensions lead to problems with the insertion of the duct. Moreover, the intake of the compressor is not axial but radial, and this means that a volute must be foreseen to convey the flux into the MGT. Several shapes of volute are analyzed in this paper, considering the effects on the pressure loss and the induction of turbulence. The challenge was to develop a fluid-dynamically efficient duct with the hindrance of a very small available space between the compressor casing, the gearbox and the fuel pipes inside the narrow noise-reduction chassis. The mass flow rate will be computed by means of the differential static pressure between the upstream and the downstream section of a Venturi tube. The choice of a Venturi was due to the fact that it produces a pressure loss lower than any other device, such as orifice plates or other nozzle shapes. Furthermore, the expected mass flow rate would lead to high fluid speeds and, as a consequence, the diameter ratio between the duct and the throat of the Venturi was chosen to be as high as possible.

This paper presents an isolation room model with a patient carrying acute air born disease with an effective ventilation system being functioned. Different models have been simulated with different vent position and the results have been observed. With the unruly rise in the spread of the COVID-19, it is paramount to restrain the virus propagation within the hospital premises. The purpose of the research is to control the virus dissemination caused by sneezing, by altering the position of the ventilation i.e. air inlet and outlet, by using flow across the room to direct it towards the outlet with maintaining a negative pressure. The negative strain helps in confining the air-borne transmission of the deadly virus from spreading across the room and not letting them permeate outside the isolated region. An isolation room model has been studied using computational fluid dynamics, by setting up a discrete phase model by using injection spray modelling to observe the permeation of the virus droplets. The behaviour of these aerosol droplets are studied using simple-semi implicit method for the equation associated with pressure by specifying the droplet size. By altering inlet and outlet locations we are able to minimise the spread of these harmful droplets by using the flow from the air inlet to go against the diffusing droplets. These paper aides well for a sudden isolation room setup anywhere with peruse dimensions of the inlet and outlet height at most optimum position.