Transcript
smart solutions
for commercial pool pumps
ECO-FLOW-E
®
Aquatic Variable Frequency Drive An economical VFD for the commercial aquatic market
www.h2flow.net
Eco-Flow® Products:
SO SMART, YET SO SIMPLE. Introducing the Eco-Flow-E® Aquatic Variable Frequency Drive (VFD) from H2flow. Eco-Flow® combines functionality, quality, and reliability to provide the user with an unparalleled VFD experience. Fully configured for the pool & spa industry, Eco-Flow-E® offers an array of unique features to ensure complete optimization of pool pumps while also maintaining ease of operation and userfriendliness.
of recreational water applications. For larger horsepower applications, H2flow offers its premium Eco-Flow-C® Aquatic Drive. Eco-Flow® Aquatic Variable Frequency Drives are backed by our combined 100-plus years of experience with monitoring and controlling pumps. H2flow is the only manufacturer in the pool industry that is totally dedicated to this technology.
Designed for 3-phase pumps up to 40HP and single-phase supplied pumps up to 15HP, Eco-Flow-E® Aquatic Variable Frequency Drives are capable of handling the vast majority
H2FLOW AQUATIC DRIVES
Front Cover: One of more than 50 swimming pools in the state of Hawaii that uses Eco-Flow® Aquatic Drives to reduce energy costs. Above: A pool equipment room at the Pueblo Bonito Resort in Cabo San Lucas, Mexico.
How a VFD saves energy:
THE AFFINITY LAWS! smart solutions Electrical energy is billed in Kilowatt Hours (kWh), i.e., how many kilowatts are used in one that are energy efficient hour. A ‘watt’ is a measurement of power that is derived from the voltage, current, and power factor. A kilowatt is 1,000 watts and 1kW is equal to 1.341 HP. Whereas a typical residential pump is rated at just 1 kW, commercial pool pumps tend to be much larger, i.e., 5 to 20 kW is not unusual. Centrifugal pumps use far less power when they run slower. The decrease in power is due to the Affinity Laws, and the results are staggering. A speed reduction of just 20% would equate to an energy reduction of almost 50%. The Affinity Laws for Centrifugal Pumps: New Power = Old Power x (new speed/old speed)3 Example: Old Power = 10 kW Old Speed = 1750 rpm New Speed = 1400 rpm (20% drop) New Power using Flow Control Valve = 9 kW (a saving of 10%) New Power using Eco-Flow-E® = 10 x (1400 / 1750)3 = 5.12 kW (a saving of 48.8%)
FILTRATION EFFICIENCY
Energy Savings - Valve or VFD?
The largest single commodity cost for operating a commercial pool is the electricity required to run the pump. Depending on the cost charged for electricity, operating a 15HP pump will typically cost $12,000 to $30,000 per year. During pool design, the engineer often ‘over-sizes’ the pump to account for changes made during construction or later additions. It is much easier to throttle back the flow rate with a control valve than it is to decrease the size of the pump. However, controlling the flow rate in this manner is comparable to driving a car with your foot hard on the gas pedal while controlling your speed with the brake - both waste a terrific amount of energy. Flow is directly proportional to the pump’s rotational speed. Using a Variable Frequency Drive to control the speed will result in significant energy savings. A drop in speed of just 10% will reduce the electrical energy by 27%. Many pumps can be slowed by 20%, which results in a staggering 49% energy saving. VFD’s are easy to install and will typically have a return on investment period of less than 1 year.
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25HP Throttle Valve HP Eco-Flow-E® HP
20HP
15HP
10HP
5HP
0HP 100%
90%
80%
70%
60%
50%
% OF PUMP SPEED
Power taken by 20HP pump. Throttling Valve versus Eco-Flow-E®.
40%
WHAT MAKES ECO-FLOW-E® DIFFERENT?
Want to know what sets Eco-Flow-E® apart from the competition? VFD’s are designed for a vast array of applications. It just so happens that aside from its very harsh environment, the commercial pool room is one of the more simple applications for VFD’s to be used on. However, no VFD manufacturer currently produces a product that is ‘specific’ to this application. There are, therefore, literally hundreds of parameters that the end customer will need to understand when setting up the product. Alternatively, they are forced to employ a factory-trained technician to not only make the initial adjustments, but also to make any future changes. Eco-Flow-E® changes all of that! Eco-Flow-E® uses a unique Aquatic Controller that allows customers who have never even seen a VFD to get up and running in less than 15 minutes. Using a ‘setup wizard’, the Aquatic Controller asks simple questions that are then automatically entered into the VFD via a communication link. The customer doesn’t even need to touch the VFD and the Aquatic Controller’s questions are structured in a format that are familiar to the customer!
A unique Aquatic Controller... Using a vivid color touch screen display, the Eco-Flow-E’s® unique Aquatic Controller provides an unrivaled user experience. Programming the VFD is achieved by simply answering a small number of simple questions. Day-to-day operation such as pump start, pump stop and backwash speed control are initiated with a simple push of a related command on the screen. With the inclusion of the Eco-Flow’s® optional Flow Transducer, the Aquatic Controller even provides a digital readout of flow (GPM).
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BUILT FOR PURPOSE smart solutions
The hostile environment of a pool equipment room is not ideal for a Variable Frequency Drive - unless it’s a NEMA 12 rated Eco-Flow-E®.
that are user-friendly
The vast majority of VFD’s are NEMA 1 rated and designed for clean, dry, non-corrosive environments, which is not typical of most pool equipment rooms. Over time, chemical gases will destroy electronic circuits that are not fully sealed and protected from such an unforgiving environment. It is essential that the VFD’s electronics be fully sealed and protected against these effects. For more than 30 years, H2flow and its partners have been exposing VFD’s to some of the harshest environmental conditions. You can count on us to protect your investment. Right: Examples of VFD circuit boards that have been damaged by chemical gases.
How much money can Eco-Flow-E® save you? The following example demonstrates annual costs both with and without Eco-Flow-E® speed control: Pool Capacity 160,000 Gallons
Utility Cost
Pump Size
Required Flow Rate1
Actual System Flow Rate2
Calculated Speed
Reduced Energy3
$0.12 per kilowatt hour (kWh)
15HP
444 GPM (160,000 Gallons / 360)
580 GPM
77% (444 / 580) x 100
54% (see note below)
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Required system flow rate to achieve state mandated 6-hour turnover. Actual system flow rate with discharge valve wide open. 3 Reduced energy calculation for above example: 0.77 x 0.77 x 0.77 = 0.46 or 46% of the full speed energy (a 54% savings). 2
In comparison, using the discharge valve to reduce the flow would have resulted in only a 13% saving. Annual Cost with no flow control
Annual Cost using throttling valve
$13,065
$10,418
Annual Cost using Minimum Eco-Flow-C® annual savings $6,149
$4,269
Typical Return on Investment Less than 1 year
Note: Utility kWh costs are determined by taking the total utility bill and dividing it by the number of kWh used in the billing period. This method will ensure that all costs including transmission, surcharges, and taxes are included.
FEATURES •
Rugged NEMA 12 Construction
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Soft Start / Stop - extended equipment life
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Aquatic Controller with Modbus Communication
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Supply Voltage: 1 x 208* / 3 x 230 / 3 x 480 VAC
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Two Programmable Speeds - optimize efficiency based on pool occupancy
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Optional 3-Contactor Bypass Panel
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Optional Line Reactor
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Constant Flow - maintains DEQ required flow rates
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Optional Load Reactor
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Programmable backwash for Manual and Automatic Systems
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Lightning Arrestor available
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Interface to Building Management System for monitoring and control
Password protected - prevents unauthorized tampering
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Built-in DC Bus Filter
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VFD Power Loss Protection
* For single phase supplies, the motor must be changed to a 3-phase motor. Bypass Panels are not applicable to single phase applications.
A rugged
NEMA 12
construction
Constant Flow While running the pump at a lower speed will achieve a significant reduction in operating costs, EcoFlow-E® can further optimize the circulation system’s performance by utilizing its powerful ‘Constant Flow’ feature. Precise control of the flow rate will ensure that the State’s mandated turnover rate is maintained - even as the filter becomes dirty. As an added safety measure, the system will not allow the pump to over-speed and will go into a visual alarm condition should it determine that the filter needs to be backwashed.
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Pump Speed System Flow System Pressure
smart solutions with an array of benefits
Supply Voltage Flow Transducer
Left: An example of how an Eco-Flow-E® and corresponding Aquatic Controller can be installed on a pump system in order to utilize Eco-Flow-E’s® Constant Flow feature.
that provides durability and reduced installation costs! Eliminate Water Hammer Starting and stopping pumps often results in ‘water hammer’ a phenomenon associated with a pressure surge or wave caused when a water motion is forced to stop or change direction. Water hammer commonly occurs when a pump is started or stopped and a pressure wave propagates in the pipe. It may also be known as ‘hydraulic shock’. This pressure wave can cause major problems, from noise and vibration to pipe collapse. By ‘soft starting’ and ‘soft stopping’ the pump, Eco-Flow-E® will completely eliminate water hammer and any risk of damage associated with it.
Benefits •
Considerable energy-saving potential
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Reduced operating noise
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Increased service life of pumps, filters, motors, and associated parts
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Can be mounted directly to pump room wall
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Quick and simple start-up with Aquatic Controller
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Programmable Automatic and Manual Backwash
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ECO-FLOW-E® Aquatic Variable Frequency Drive
Specifications Intallation Environment Supply Voltage HP Range Construction Operating Temperature Supply Frequency Output Frequency Relative Humidity Max Altitude without de-rating Output Voltage Rated Output Current VFD efficiency at nominal Load Speed Control Communication Protocol between VFD and Eco-Flow-E® Controller
Indoor, wash down, corrosive gases possible 1 x 208/230VAC +10% / -15%. Requires 3-phase motor 3 x 208/230VAC +10% / -10% 3 x 480VAC +10% / -15% single-phase, 208/230VAC, 0.5 - 15HP 3-phase, 208/230VAC, 1 - 30HP 3-phase, 480VAC, 2 - 40HP NEMA 12 32 - 104ºF (122ºF with de-rating) 50 - 60 Hz 0 - 400 Hz 90% or less 3,280 ft. De-rate by 1% for every 328 ft. above this. Max 13,123 ft. 0 - Mains Supply Voltage Current Rating of VFD, 120% overload for 1 minute 97% Via Eco-Flow-E® Controller. Programmable speeds based on time or Constant Flow. Modbus
How does your single-speed pump stack up against Eco-Flow-E®? Features Two Programmable Speeds based on Real Time Clock Setting Constant Flow based on either Pressure or Flow Sensor input Soft Start / Stop
Eco-Flow-E®
Single-Speed Pump
Yes Yes Yes
No No No
AVAILABLE FROM:
3545 SILICA ROAD, SYLVANIA, OH 43560 ● WWW.H2FLOW.NET ● 888 635 0296
Variable Frequency Drives ● Flow Meters ● Anti-Entrapment Devices ● Custom Control Panels All H2flow trademarks are owned by H2flow Controls, Inc. The Eco-Flow®, Eco-Flow-E®, and Eco-Flow-C® names are registered trademarks owned by H2flow and used under the H2flow Pool & Spa Products Division. Because H2flow continues to make changes to, and improve it’s products and services, H2flow reserves the right to change specifications and product features without notice. Please contact H2flow or visit www.h2flow.net for the most up-to-date versions of our product literature. H2flow is an equal opportunity employer.
EF-C-V2.0. © 2013 H2flow Controls, Inc. All rights reserved.
