Calgonpump@Hydropneumatic Tank Sizing
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HYDROPNEUMATIC TANK SIZE CALCULATION Important information required for hydro-pneumatic tank sizing (a) Cut in pressure (b) Cut out pressure (c) Average capacity (d) Motor sizing (to determine no(s) of allowable start/stop per hour Hydropneumatic Tank Size = Effective System Protection Drainage Volume Effective system protection = Average Capacity x Average time taken to fill up tank Average capacity = Capacity @ average pressure point Average pressure (cut in + cut out) 2 Average time taken to fill up tank = ½ of total time assuming worst scenario of maximum no(s) of start stop occurs Example If system consist of 2 no(s) of DOL starting pump, the allowable start stop per pump shall be 20 times, thus for the system, the allowable start/stop shall be 40 times. (because system is design to lead-lag) Allowable no(s) of start stop is based on one (1) hour rate, thus, one cycle of start/stop at worst situation is = 60 minutes / 40 minutes = 1.5 minutes In this cycle, if we assume that the capacity of the tank is an amount which only be filled up / drained off in ½ T then the tank size is sufficient to serve as a buffer for that particular system. so, half T = 1.5 min/2 = 0.75 min Drainage Volume = 1 - CUT IN PRESSURE (psi) + 14.5 . CUT OUT PRESSURE (psi) + 14.5
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Transcript of Calgonpump@Hydropneumatic Tank Sizing
HYDROPNEUMATIC TANK SIZE CALCULATION Important information required for hydro-pneumatic tank sizing (a) Cut in pressure (b) Cut out pressure (c) Average capacity (d) Motor sizing (to determine no(s) of allowable start/stop per hour Hydropneumatic Tank Size = Effective System Protection Drainage Volume Effective system protection = Average Capacity x Average time taken to fill up tank Average capacity = Capacity @ average pressure point Average pressure (cut in + cut out) 2 Average time taken to fill up tank = ½ of total time assuming worst scenario of maximum
no(s) of start stop occurs Example If system consist of 2 no(s) of DOL starting pump,
the allowable start stop per pump shall be 20 times, thus for the system, the allowable start/stop shall be 40 times. (because system is design to lead-lag)
Allowable no(s) of start stop is based on one (1) hour rate, thus, one cycle of start/stop at worst situation is
= 60 minutes / 40 minutes = 1.5 minutes
In this cycle, if we assume that the capacity of the tank is an amount which only be filled up / drained off in ½ T then the tank size is sufficient to serve as a buffer for that particular system. so, half T = 1.5 min/2 = 0.75 min
Drainage Volume = 1 - CUT IN PRESSURE (psi) + 14.5 . CUT OUT PRESSURE (psi) + 14.5
HYDROPNEUMATIC TANK SIZING (Guide for 2 pumps system) Analysis on flowrate Vs Hydro-pneumatic tank sizing Note: Hydropneumatic tank size is designed based on the following information. (A) Two (2) no(s) of Pump (B) System is running on a differential pressure of 10 m (C) No(s) of allowable start/stop per hour is based on;
Motor Size Type of Starting Maximum nos. of start/stop per hour
Motor below 2.2 kW DOL 20 Motor from 3 – 7.5 kW Star Delta 15 11 kW and above Auto-Transformer 10
Results
Maximum Capacity
Cut in 10 m Cut out 20 m
Cut in 15 m Cut out 25 m
Type of Starter (based on motor size)
Recommended Hydro-pneumatic tank capacity
29 igpm 25 igpm DOL
22 igpm 18 igpm Star Delta 300 Litre
48 igpm 42 igpm DOL
36 igpm 31 igpm Star Delta 500 Litre
97 igpm 84 igpm DOL
73 igpm 63 igpm Star Delta 1000 Litre
146 igpm 126 igpm DOL
110 igpm 94 igpm Star Delta
73 igpm 63 igpm Auto Transformer
1500 Litre
146 igpm 126 igpm Star Delta
97 igpm 84 igpm Auto Transformer 2000 Litre
220 igpm 189 igpm Star Delta
146 igpm 126 igpm Auto Transformer 3000 Litre
293 igpm 251 igpm Star Delta
195 igpm 168 igpm Auto Transformer 4000 Litre
367 igpm 315 igpm Star Delta
244 igpm 210 igpm Auto Transformer 5000 Litre
HYDROPNEUMATIC TANK SIZING (Guide for 3 pumps system) Analysis on flowrate Vs Hydro-pneumatic tank sizing Note: Hydropneumatic tank size is designed based on the following information.
(A) Three (3) no(s) of Pump
System is running on a differential pressure of 10 m
(B) No(s) of allowable start/stop per hour is based on;
Motor Size Type of Starting Maximum nos. of start/stop per hour Motor below 2.2 kW DOL 20 Motor from 3 – 7.5 kW Star Delta 15 11 kW and above Auto-Transformer 10
Results
Maximum Capacity
Cut in 10 m Cut out 20 m
Cut in 15 m Cut out 25 m
Type of Starter (based on motor size)
Recommended Hydro-pneumatic tank capacity
44 igpm 37 igpm DOL
33 igpm 28 igpm Star Delta 300 Litre
73 igpm 63 igpm DOL
55 igpm 47 igpm Star Delta 500 Litre
146 igpm 126 igpm DOL
110 igpm 94 igpm Star Delta 1000 Litre
220 igpm 189 igpm DOL
165 igpm 141 igpm Star Delta
110 igpm 94 igpm Auto Transformer
1500 Litre
220 igpm 189 igpm Star Delta
146 igpm 126 igpm Auto Transformer 2000 Litre
330 igpm 283 igpm Star Delta
220 igpm 189 igpm Auto Transformer 3000 Litre
440 igpm 377 igpm Star Delta
293 igpm 252 igpm Auto Transformer 4000 Litre
550 igpm 472 igpm Star Delta 367 igpm 315 igpm Auto Transformer 5000 Litre
HYDROPNEUMATIC TANK SIZING (Guide for 4 pumps system) Analysis on flowrate Vs Hydro-pneumatic tank sizing Note: Hydropneumatic tank size is designed based on the following information.
(A) Four (4) no(s) of Pump
System is running on a differential pressure of 10 m.
(B) No(s) of allowable start/stop per hour is based on;
Motor Size Type of Starting Maximum nos. of start/stop per hour Motor below 2.2 kW DOL 20 Motor from 3 – 7.5 kW Star Delta 15 11 kW and above Auto-Transformer 10
Results
Maximum Capacity
Cut in 10 m Cut out 20 m
Cut in 15 m Cut out 25 m
Type of Starter (based on motor size)
Recommended Hydro-pneumatic tank capacity
58 igpm 50 igpm DOL
44 igpm 37 igpm Star Delta 300 Litre
97 igpm 84 igpm DOL
73 igpm 63 igpm Star Delta 500 Litre
195 igpm 168 igpm DOL
146 igpm 126 igpm Star Delta 1000 Litre
293 igpm 252 igpm DOL
220 igpm 189 igpm Star Delta
146 igpm 126 igpm Auto Transformer
1500 Litre
293 igpm 252 igpm Star Delta
195 igpm 168 igpm Auto Transformer 2000 Litre
440 igpm 378 igpm Star Delta
293 igpm 252 igpm Auto Transformer 3000 Litre
587 igpm 504 igpm Star Delta
391 igpm 336 igpm Auto Transformer 4000 Litre
734 igpm 630 igpm Star Delta
489 igpm 420 igpm Auto Transformer 5000 Litre
