Cooling Tower Study

Overview
Cooling towers represent largest reuse of water in industrial and commercial applications. Cooling towers offers the means to remove heat from air conditioning systems and industrial processes generating excess heat. Cooling towers are normally designed for maximum process load and worst ambient conditions. Optimizing operation and effective maintenance of cooling towers systems offer facility and process managers significant savings in energy and water consumption. As result saving potential of about 20-25% can be achieved by optimizing excess capacities of pumps and fans catering to under loaded process.
Most cooling towers develop significant draft. Drift eliminator at the top of tower prevent water from being blown off or sucked out of tower. This type of water loss is called drift loss or windage loss. Makeup water is added to replenish the water lost by evaporation or blow-down.
Liquid/Gas (L/G) ratio, of a cooling tower is the ratio between the water and the air mass flow rates. Against design values, seasonal variations require adjustment and tuning of water and air flow rates to get the best cooling tower effectiveness through measures like water box loading changes, blade angle adjustments.
Scope of Work
Case Study
Energy Conservation Measures : Stop the Hotwell Circulation Pump by Eliminating the Hotwell Section
Observation
Suggestion
Data
| SN | Description | Unit | Data |
|---|---|---|---|
| 1 | Hot Well Circulation Pump 1 Power | kW | 5.551 |
| 2 | Hot Well Circulation Pump 1 Power | kW | 5.103 |
| 3 | Hot Well Circulation Pump 1 Power | kW | 5.056 |
| 4 | Total Power Consumption | kW | 15.709 |
| 5 | Total Running Day | Day | 300.00 |
| 6 | Electrical Unit Cost | Rs/ kWh | 8.30 |
| 7 | Annual Power Saving Possible | kWh | 113105 |
| 8 | Annual Saving in Monetary Terms | Rs/- | 938776 |
| 9 | Investment of Merge Hotwell and Cold Well Section | Rs/- | 100000 |
| 10 | Simple Payback Period | Month | 1.28 |
Existing Circulation of Water at Cooling Tower

Existing Circulation of Water at Cooling Tower
Suggested Cooling Tower Water Circulation

Suggested Cooling Tower Water Circulation
Energy Saving Opportunities in Cooling Tower
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