FRM Series
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In 2002 Mihir introduced a new design combining FRP with RCC Cooling Towers for capacity upto 3000 CMH per cell. With more 1000 towers installed this design has been a huge success in Process Industries and Captive Power Plants with capacity ranging from 2 M.W. to 20 M.W.
Design Advantage
- Motor and Gearbox are directly coupled on a common mounting frame supported on a center RCC column thereby avoiding any vibrations commonly caused by misalignment of transmission shaft between motor and gearbox.
- This unique concept of center RCC column allows FRP casing and FRP fan section to be kept independent of rotating parts like gearbox, motor and fan.
Cost Advantage
- The onsite RCC construction cost of these towers is considerably low as the casing is in FRP which is manufactured at the factory and assembled at the site.
- The operating costs of these towers are comparatively low as the power consumption is reduced by providing extra quantity of fills which increases the wetted surface area.
Salient features
- Basin and Air entry portion are in RCC
- Casing & Fan section are in FRP
- Entire load of PVC fills rests on RCC structure, thereby avoiding load on FRP casing.
- For contaminated water and water with suspended particles PVC fills of flute size 19mm can be used.
- MOTOR: 1500 RPM, 415V TEFC, IP65 Weather proof, horizontally foot mounted.
- Make: Siemens /Crompton/ equivalent
- FAN: Axial flow fan with FRP blades and dynamically balanced, hub rotating at 288 RPM
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PARTIAL LIST OF CLIENTS FOR CAPTIVE POWER PLANTS
Name of Client
Swaraj Tractor – Ropar
Remi Metal – Jaghadia, Gujaratz
Rajashree Polyfils Ltd.– Bharuch, Gujarat
Sangam Spinners Ltd.– Bhilwara, Rajasthan
JBF Industries Ltd. Silvassa
Nitin Spinners Ltd.–Bhilwara, RajasthanS
West Coast Paper Mills Ltd.– Bangalore
Cadila Healthcar ltd.– Changodar, Gujarat
Vardhman Spinning & Ginning Mills–Ludhiana
Garden Silk Mills Ltd. – Surat, Gujarat
MRF Ltd.–Kottayam, Kerala
Bharat Vijay Mills– Kalol, Gujarat
Emdeki Project, –Indonesia
Century Denim, Khargon, M.P
Modern Terry Towel Ltd. – Sanand, Gujarat
LG Electronics India Pvt. Ltd. – Noida
Auro Weaving Mills, Baddi
Punjab Anand Lamps Industries Ltd. – Chandigarh
Arunoday Mills Ltd.– Morbi, Gujarat
Jindal Iron & Steel Co. Ltd.– Tarapur
TCP Power Ltd.– Tamilnadu
Rajasthan State Mine & Minerals Ltd.– Rajasthan
Maharaja Shree Umaid Mills Ltd.–Pali, Rajasthan
Core Healthcare Ltd.– Viramgam, Gujarat
Hero Honda Ltd.–Noida
R.K. Power Gen Pvt. Ltd.– Chennai
Sumeet Industries Ltd.– Surat
Rainbow Papers Ltd. – Chhatral
Maruti Textiles Pvt. Ltd. – Surat, Gujarat
Pioneer Syntex Pvt. Ltd. – Surat, Gujarat
Gokulanand Petrofibres – Surat, Gujarat
Pratibha Fabrics Ltd. – Surat, Gujarat
Aaryan Paper Ltd. – Vapi, Gujarat
Triveni Petrochemicals Limited – Nepal
Mono Steel – Gandhidham, Gujarat
N.R.Paper – Vapi, Gujarat
Arvee Denim – Ahmedabad, Gujarat.
Capacity(MW)
4
3
10
2.5 & 3.8
10
2.5
3.8
4
3
4
3.8
12
10
3
2
3
3
4
3.8
3.8
60
3.8
3.8
5
3.8
20
2.5
5
1∙5
2
2.5
2
2.5
18
6
5
5
Description Mihir CT Counterflow Other CTCrossflow Remarks Water inlet height Low
Water distribution is inside the cooling tower at about 3.5m height above basin top level Low pump head requiredHigh
Water distribution tray is on the top of the tower at about 7m height above basin top level High pump head requiredHigher the height, higher the pumping head required Water distribution system Water distribution is inside the cooling tower, protected from outside atmosphere and sun. Hence no algae formation and no setting of dust, dirt and leaves Water distribution tray is outside the cooling tower, exposed to atmosphere and sun, thus causing algae formation and setting of dust, dirt and leaves in the tray Exposure to sun and atmosphere causes algae formation and setting of dust, dirt, leaves etc. in the tray Hot air circulation Hot air recirculation is completely eliminated. Since air entry is all around from the bottom of casing and above basin top level, fan discharge and air entry are well separated, re-circulation of hot air is not possible Recirculation of hot air takes place. Since air entry and air discharge are close by and air entry is through-out the vertical section of the cooling tower, the discharge of hot air entering into cooling tower is unavoidable resulting in recirculation of hot air in the cooling tower Hot air recirculation in the cooling tower reduces the efficiency of the cooling tower Cleaning of basin Easy and can be done through air entry section Difficult, as basin is directly below the PVC fills Cleaning of cooling tower basin is required for maintaining the quality of water for better heat transfer. Fill height The height of PVC fills is low (approx 900 mm) and spread across the entire horizontal cross section of the tower. The height of fills is more and spread partly across the horizontal cross section of the tower Lower the fill height, lower pumping head. Easy to construct Site activity is reduced to less than 50% and less labour force is required. Frp top section is totally factory moulded and supplied as ready for assembly / installation at site, which normally takes about 10 to 12 weeks. RCC casing and entire civil work takes minimum 8 to 10 weeks involving a large labour force Easy to construct. Reduction in site activity and labour force, hence economical in cost and time
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