Energy Saving Control SystemsEnergy Saving Control Systems
Used to regulate the motor speed on demand, saving energy.
HYDROVAR FREQUENCY CONVERTERS
Hydrovar is the world's first pump mounted , microprocessor based pumping system controller. The Hydrovar does much more than just change motor speed. It truly manages your pump performance to match a wide range of system conditions, allowing energy savings of up to 70% in some applications. It can be fitted to any standard IEC motor from 0.55kW to 45kW.
What does the Hydrovar do?
The basic function of the Hydrovar is to control the pump to meet your system demands in one of three ways.
1)Control for constant pressure. The desired discharge pressure is set (in bar) by the operator. The Hydrovar varies pump speed as demand increases or decreases to keep the pressure constant
2)Control to match a system curve. The operator can increase the discharge pressure of the system to compensate for the added friction losses in the system. The Operator enters the percentage increase in discharge pressure required at the maximum speed and flow. In addition, the operator selects at which increased pressure this will start.
3)Control for constant flow. The operator sets a required flow in either circulator or process applications. As demand changes, the hydrovar increases pressure to maintain flow.
How does it do this?
1) Measures the system pressure of flow via a transducer mounted on the pump discharge.
2) Calculates the motor speed to maintain the correct flow or pressure.
3) Sends out a signal to the pump motor to start, increase speed, decrease speed and stop
4) In multiple pump installations the hydovar will vary the order of the lead pump and turn on the lag pumps automatically of duty/assist sets.
In addition the Hydrovar will ...
- Shut off the pump(s) at zero demand.
- Shut off the pump(s) at zero suction.
- Shut off a single pump when exceeding maximum flow or automatically turn on the next pump in a multiple series.
- Protect the pump and motor from over voltage, under voltage, overload and overhead.
- Vary the time of pump speed acceleration and deceleration.
- Automatic compensation of higher friction losses at high flow rates.
- Send out a signal for remote monitoring of pressure and frequency.
- Conduct an automatic test run of the pump at set times.
- Display all functions in an LCD window in either English, German, Spanish, Portuguese, French, Italian or Dutch.
- Can communicate with another Hydrovar or computer via an RS 485 interface.
Typical energy savings
| In-line circulator pump | ||||
| Capacity m³/h | Power consumed in kW | Saving in kW | Saving in kW @ each capacity for 8 hours per day | |
| Pump at fixed speed | Pump & Hydrovar following system curve | |||
| 30 | 6.50 | 1.57 | 4.93 | 14,395.60 |
| 60 | 8.30 | 3.00 | 5.3 | 15,4088.00 |
| 90 | 9.90 | 6.57 | 3.33 | 9,723.60 |
| Total | 39.595.20 | |||
| @8p/kW/h | £3,167.62 | |||
| Vertical Multistage pump | ||||
| Capacity m³/h | Power consumed in kW | Saving in kW | Saving in kW @ each capacity for 8 hours per day | |
| Pump at fixed speed | Pump & Hydrovar following system curve | |||
| 15 | 5.76 | 3.10 | 2.66 | 7,767.20 |
| 25 | 6.45 | 4.24 | 2.22 | 6,453.20 |
| 30 | 6.60 | 5.20 | 1.40 | 4,088.00 |
| Total | 18,308.40 | |||
| @8p/kW/h | £1,464.67 | |||
