Question

Importance of specific water requirement at pilgrimage place and recreation activities.

Answer 1

${\huge {\mathfrak {Answer :-}}}$

➡️ Water is essential & one of the key input requirements for thermal power generation. Among many uses of water, cooling tower, which consume more than 80% of input water for make up. Cooling towers, works on evaporative cooling methodology require significant quantities of "make-up" water to compensate for losses associated with evaporation, drift and blowdown. This makes a power plant more water intensive. However, as water resources become scarcer, human consumption like drinking and irrigation uses have got high priority over industrial uses. In the recent past, the state governments have resorted to abnormal increase in water charges approx. 94 to 718 %. Further, the government has issued a notification (on 7 December 2015) to limit the specific water consumption to 2.5 m3/MWh. Hence, Power plants need to optimize the conservation, recycling and reuse practices to meet this target. This paper discusses a methodology to reduce evaporation from CT. Reduction in evaporative loss from cooling has two advantages. First it will reduce the make up water required to compensate for the evaporative loss. When evaporation itself reduced, the blow down also reduces proportionally. A significant amount of water can be saved using this proposed methodology with little or no investment and provides quick result. A detailed study has been carried out to assess the acceptability & feasibility of using hot side blow down compared to cold side of CW system. Data regarding nature of water consumption were collected from various units in NTPC Ltd for an in-depth analysis. The study found that, max. of approx. 23 to 36 m3/h of water can be saved in a 500 MW unit depending on COC. The study also highlights indirect benefits like reduction in CW pumping power, pre-treatment cost, raw water pumping power, in addition to reduction in loss due to evaporation in cooling towers. These saving can be multifold in the existing plants where the COC is less.

That's it..