Journal of institution of engineers (India) series B, Jul 30, 2020
This paper presents the practical analytical study of the existing water supply of the quarters a... more This paper presents the practical analytical study of the existing water supply of the quarters and hostels buildings of the Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, and also design of smart intelligent water supply system through automation to achieve energy efficiency with improved system reliability. For this zone of university, the water is supplied in two stages, i.e., supply from the well which is about 700 m away from the distribution ground level tank and from this ground level tank water is distributed to various hostel and quarter buildings. The pipeline from well is 100 mm and the pump used is submersible 10HP. The daily water transmission is about 2.5 lacs liter of water, and the pump runs for more than 8 h daily round the year. The water distribution from ground level tank is through 80-mm pipeline by monoblock pumpset of 10 HP. The efficiency of pump system depends on its operation on performance curve according to its operating point. In this work, the system curve is prepared by using pipe loss nomogram, by using the Google Earth navigation for pipeline length and static head calculations. The operation of pump system along system curve is simulated by using the Python. The significant power saving can be achieved through five steps, i.e., the automation of the water supply system, reduction of flow rate (variable-frequency drive) to minimize head loss, power factor correction capacitor, (to provide the required kvar to the motor), use of the 24 9 7 programmable timers which will switch On and OFF the pump motor as per setting and avoid unnecessary running of the pump and taking benefit of TOD tariff. The operation of pump during night hours benefits both electrical utility and also the university. There exists the opportunity for the reduction of GHG emission by implementation of the above five steps. To simulate the flow reduction scope, the Python is used. The use of the VFD drive and the automation of the water supply system result in the significant savings in both energy cost and GHG emissions. Also the automation results in the reliability of the supply with the avoiding overflow of the water which also results in the water conservation. For motors used for driving the pumps, the consumption of the electrical energy is proportional to the cube of the flow rate. Therefore, relatively small reduction in the flow rate may result in significant energy savings. There is possibility for triple saving that is thousands of electricity units, lacs liter of water and tones of greenhouse gas.
Development of the Intelligent Water Supply System for Energy Efficient and Reliable Operation Through the Automation of the System and Use of the VFD for Efficient Pump Operation
Journal of The Institution of Engineers (India): Series B, 2020
This paper presents the practical analytical study of the existing water supply of the quarters a... more This paper presents the practical analytical study of the existing water supply of the quarters and hostels buildings of the Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, and also design of smart intelligent water supply system through automation to achieve energy efficiency with improved system reliability. For this zone of university, the water is supplied in two stages, i.e., supply from the well which is about 700 m away from the distribution ground level tank and from this ground level tank water is distributed to various hostel and quarter buildings. The pipeline from well is 100 mm and the pump used is submersible 10HP. The daily water transmission is about 2.5 lacs liter of water, and the pump runs for more than 8 h daily round the year. The water distribution from ground level tank is through 80-mm pipeline by monoblock pumpset of 10 HP. The efficiency of pump system depends on its operation on performance curve according to its operating point. In this work, the system curve is prepared by using pipe loss nomogram, by using the Google Earth navigation for pipeline length and static head calculations. The operation of pump system along system curve is simulated by using the Python. The significant power saving can be achieved through five steps, i.e., the automation of the water supply system, reduction of flow rate (variable-frequency drive) to minimize head loss, power factor correction capacitor, (to provide the required kvar to the motor), use of the 24 9 7 programmable timers which will switch On and OFF the pump motor as per setting and avoid unnecessary running of the pump and taking benefit of TOD tariff. The operation of pump during night hours benefits both electrical utility and also the university. There exists the opportunity for the reduction of GHG emission by implementation of the above five steps. To simulate the flow reduction scope, the Python is used. The use of the VFD drive and the automation of the water supply system result in the significant savings in both energy cost and GHG emissions. Also the automation results in the reliability of the supply with the avoiding overflow of the water which also results in the water conservation. For motors used for driving the pumps, the consumption of the electrical energy is proportional to the cube of the flow rate. Therefore, relatively small reduction in the flow rate may result in significant energy savings. There is possibility for triple saving that is thousands of electricity units, lacs liter of water and tones of greenhouse gas.
Development of efficient and reliable water supply system with motivation to conserve electricity, water and GHG emission within Dr. B. A. M. University Campus
This paper presents the case study of the water supply of the hostels buildings of the Dr. Babasa... more This paper presents the case study of the water supply of the hostels buildings of the Dr. Babasaheb Ambedkar Marathwada University Aurangabad. There are about fourteen individual buildings with approximately sixty four water tanks located on the terrace of the buildings and underground tanks to collect and store the water for the individual buildings. From these underground tanks the water is pumped to the terrace tanks through electrical pumps. Each tank inlet is provided with ball cock valve to close the water supply after the tank fills up. The different valves are generally in semi closed conditions which results in the throttling of the water flow and causes overloading of the motors and also eventually causes unnecessary tripping of the motors. This also results in throttling effect and causes additional power consumption to overcome. This throttling effect can be minimized and the extra power consumption can be saved by the application of the VFD for the pump motor and the automation of the water supply system. The use of the VFD drive and the automation of the water supply system results in the significant savings in both cost and GHG emissions. Also the automation will result in the reliability of the supply with the avoiding overflow of the water which also results in the water conservation. For motors used for driving the pumps, the consumption of the electrical energy is proportional to the cube of the flow rate. Therefore relatively small reduction in the flow rate may result in significant energy savings.
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