MerMaid

Lift Station

How can a lift station with two identical pumps, having identical flow rates waste  $2000 or more on  electrical power per year? Simple - one of the pumps uses 40% more electricity than the other to do the same job. Yes, it is possible and it happens every day. Electrical bills can be drastically reduced by indentifying how much electricity is wasted by inefficient pumps in your collection system, and acting on it.

Flow rate and energy consumption for each pump are required to calculate pump efficiency: the number of gallons pumped per watt of electricity used. Until now, this money saving service was too expensive requiring highly trained field persona and nearly $20,000 of power and flow monitoring instruments for several days to get all the required data. The cost of such a service was simply too high … until now.

Over a period of 17 years, our engineering staff developed the most accurate patented volumetric flow technology. Then, for 7 years, we worked on a multi-pump multi-phase electrical recorder that could fit inside all pump station control panels. It is now possible to get this valuable information and much more at a reasonable cost by buying the equipment for permanent installations or by using our services.

Evaluation Report

After a one week analysis, you would get the following information:

  • Cost of using each pump for one year
  • Savings if only the most efficient pump would be used
  • Savings if the pumps were replaced by new highly efficient pumps (based on efficiency curves supplied by multiple manufacturer)
  • Daily flow curve compared to average dry day curve
  • Pump efficiency for each pump
  • Flow rate for each pump
  • Number of starts
  • Operation time
  • Average operation time per cycle
  • Equilibrium of the current within each pump
  • Equilibrium of the voltage powering the lift station, including generator for duplex stations
  • Abnormal starts or stops (multiple events within few seconds)
  • With optional rain gauge: daily flow, rain and infiltration curves
  • Monthly reports including for each day: rain, total daily volume, daily
    average flow, maximum flow and time, and for each pump and combinations of pumps, average pump flow rate, number of starts, operation time.
  • Excel reports with one line per change of state of the pumps (and rain clicks) including time of occurrence of events, duration, pump operation, rain, volume, influent flow and pump flow rate.
  • Excel report with one line per 15 minutes (user can specify other period) including rain, volume, average influent flow, maximum flow and time, Average pump capacity, run time and starts.

Flow and Infiltration

Inflow and Infiltration

This report shows:

  • Daily inflow (red),
  • Average dry day inflow (brown),
  • Infiltration (dotted line)

The left panes show the data used to generate the reports. Data is sorted by clicking on heading of columns. Panes can be hidden to maximize the viewing area.

Reports ca be generated in PDF format. Click here to download an example of this report.

Real Time Electricam Monitoring

Real Time

This screen displays data in real time from an instrument connected to the computer using one a RS232 serial communication port, a cellular modem, a Bluetooth or Ethernet interface.

Type of dials can be selected in the left pane. Their size and range can be adjusted. The following information can be viewed in real time:

  • Current and Voltage
  • Frequency
  • Time
  • Battery voltage
  • Temperature
  • Analog and digital inputs
  • Rain (pulse input)

Flow and Infiltration

Event and Flow

This report shows:

  • Date, time and duration of each part of pumping cycles.
  • Pump in operation color coded to follow alternation
  • 100% accurate inflow when no pump runs. Calculated estimated inflow when pumps are in operation
  • Data is sorted by clicking on heading of columns.
  • Exported to native Excel format and PDF

Variation of the report shows:

  • One line per period of 15 and 30 minutes, 1, 2, 3, 4, 6 and 12 hours, one day, one week and one month.
  • Each line includes rain, volume, inflow, maximum inflow and time, and for each combination of pumps, outflow, run time and number of starts.
  • Summaries
Click here to download an example of the monthly report.

Evaluation Report

Evaluation Report

The detail of this report is described above in this page.

Settings related to this report are in the left pane. They are:

  • Cost per kilowatt
  • Specify the efficiency used to compare the pumps or to compare them between themselves.
  • Minimum duration of an event to be considered suspicious.

Based on the first two elements, the cost of the energy wasted will be affected.

This report ca be exported to native Excel format and PDF. Click here to download an example of this report.

Current analysis Current, Voltage and others

This report is very practical to analyze the electrical behavior of the pumps. The scale can be adjusted. The following information can be viewed:

  • Current
  • Voltage
  • Frequency
  • Power
  • Each phase of Pump 1, 2 or 3 individually
  • Analog input (4-20mA/0-5V)
  • Battery
  • Temperature

Real Time Predictive Maintenance Flow. Rain, Infiltration
Installed in 2 minutes Detailed Reports Wasted Electricity

Greatest Expense

Maid Labs Inc. Granby, Quebec, Canada - Office: 450-375-2144 Fax: 450-777-2924 - Email: Info@maidlabs.com

Download the literature - View the Installation Video - View results of flow study

Mermaid 2009 User's Manual - Older Web site - Ancien site Internet en Français