Water-energy nexus of water supply in Delhi
Student name: Ms Deepali Goyal
Guide: Dr Arun Kansal
Year of completion: 2015
Host Organisation: TERI University
Supervisor (Host Organisation): Dr Arun Kansal
Abstract: Delhi, the national capital territory of India is a rapidly growing megacity which faces a huge challenge of growing water demand. While historically, water supply has never been linked to energy consumption, it is nevertheless an important constraint to meet future water requirement. All Water Supply stages such as abstraction, treatment, conveyance and distribution are heavily dependent on Energy. This thesis, therefore focuses on energy use of Water supply in Delhi, which is being handled by Delhi Jal Board (DJB). DJB supplies water to the capital city of Delhi through ten Water Treatment Plants with the treatment capacity of 799 MGD. It supplies water through 10,149 km long pipelines, which on its way passes through approximately 550 Booster Pumping Stations. Apart from this centralized piped supply network, DJB also supply water to remote locations through tankers and packaged bottled water. The total electricity consumption for this huge system is nearly 776176.97 kWh per day. The unit electricity consumption for Centralised Water supply is 0.219 kWh for treating and distributing 1 m3 of water per day whereas bottling plant uses 39.22 kWh/m3 of electricity per day. This study therefore highlights that centralised water supply is more efficient in terms of electricity consumption than the De-centralised supply. The study also suggests that water conservation and elimination of water wastage will save huge amounts of energy.
Key words: Delhi Jal Board, Water Treatment plants, Distribution, Water tankers, Bottling plant, Electricity consumption
