controls and variable speed drives or the great delta pt vs delta pv debate vfd and ecm controls
TRANSCRIPT
![Page 1: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/1.jpg)
Controls and Variable Speed DrivesOr the Great Delta PT vs Delta PV Debate
VFD and ECM Controls
![Page 2: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/2.jpg)
Pump performance curve
system curve
intersecting point = new operation point
new system curve
System Friction Loss (Head)Is it a Pump or a Circulator?
Hea
d H
F
t
Flow Q USGPM
Both zone valves are openonly one zone valve is open
![Page 3: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/3.jpg)
3
BMS system
pump
power generation
supplyreturn
2-pipe system
possible excess supply
possible lack of supply
The ABC of hydraulics, human
brain
lungs
liver heart
digestive organ
kidneys
skin, muscles
![Page 4: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/4.jpg)
Artisan Heating ProjectNew York, New York
11,152 sq ft heated area, school for Autistic children
Original Pump Specification> Three 7 ½ Hp, 250 Usgpm at 70‘ TDH, constant speed in-line pumps
> Amperage (measured) 14 Amps
Retrofit ECM Pumps> “ECM” in-line pumps, SET AT 13’ TDH!
> Amperage (averaged) 2.0 Amps
> Operating at 340 Watts – about ½ Hp
Customer Comments> “Much better comfort due to the ability of controlling the system, hot and cold spots have been eliminated.”
Recorded Amperage/Energy Savings (based on $0.20 per Kwh, 5040 Hrs/annum)> Original pump – 2327 Watts/Hr/1,000 x 5040 Hrs x $0.20 = $2,345.62 per year for power
> New ECM pump – 360/Hr/1,000 x 5040 Hrs x 0.20 = $362.88 per year
> Annual savings $1,982.74! One Pump! Times three!
OldNew
![Page 5: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/5.jpg)
5
VFD vs ECM
Year built 1972
Floor Area 80,000 ft²
Building Volume 1.1 million ft³
Boilers (condensing)
> One @ 800,000 Btu peak load
> One @ 580,000 Btu partial
Upgrading of the heating pumps only with no boiler upgrades, additional exterior insulation or heat emitter upgrades.
Heating Power:
> before refurbishment 1900 kW
> After 400 kW
![Page 6: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/6.jpg)
6
Installed pump technology in the heating circuit North/East
Installed until Oct. 2003 since October 2003
Pump type Wilo-TOP-E 65/1-10 VFD non-ECM Wilo-Stratos 30/1-12 ECM
Application HC North/East HC North/East
Set head [ft] 20 16
Set Volume [USGPM] 50 20
Average power consumption [W] 790 40
Hours of operation annually. [h] 6.000 4.000
Energy consumption per year [kWh] 4.740 160
Energy Costs at 0,174 ¢/kWh 824,80 USD 27,80 USD
Energy Costs in 10 years 8.247,60 USD 278,40 USD
Energy Savings of 97%
VFD vs ECM
![Page 7: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/7.jpg)
7
Installed pump technology in heating circuit North/East
Results:
> The electrical energy consumption for the operation of the heating system was 1,200 kWh/ft³/year before refurbishment
> The electrical energy consumption for the operation of the heating system is now at 22.2 kWh/ft³/year
VFD vs ECM
![Page 8: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/8.jpg)
8
Results:
> Comparison of Costs over 18 years:
> With an energy price of 0.174 USD/KWh increased 3% per year as well as a capital interest of 5% of the savings the result is the following energy and cost comparison:
Electronically controlled pump Wilo-Stratos
Annual Energy Consumption 85 MWh 3,6 MWh
Annual Energy Costs 48.000 USD 2.000 USD
VFD vs ECM
![Page 9: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/9.jpg)
9
Results
> Energy costs over 10 years
9,740
410
16,000
700
0
2,000
4,000
6,000
8,000
10,000
12,000
14,000
16,000
18,000
electr. controlled Pump Wilo-Stratos
* Without interest on savings** with interest on savings
*
*
**
**
VFD vs ECM
![Page 10: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/10.jpg)
Wilo-Stratos - The High Efficiency Pump.10
Results
> CO2 Emissions in kg over 10 years
57,000
2,500
0
10,000
20,000
30,000
40,000
50,000
60,000
elect.controlled pump Wilo-Stratos
VFD vs ECM
![Page 11: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/11.jpg)
Motor Efficiency – ECM vs Standard
ECM Technology provides an improved motor efficiency over the entire load range of the motor.Result is between 50% to 70% increase in effeciency of ECM pumps vs pumps with VFD‘s (variable frequency drives)
Flow (or Load)
ACM
ECM
Partial and low load conditions exist during more than 98% of the total operating range!
![Page 12: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/12.jpg)
Delta T vs Delta P (Sensor? Where?)
![Page 13: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/13.jpg)
Functional – Inter Face Modules
Front access (Face-to-Face)
>Freely accessible wiring connections - NPT
>Large terminal box
>Plug-in IF-Modules
>Field installed
> Interchangeable in any 8 Stratos models
![Page 14: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/14.jpg)
•
•
• • • • •
• • •
•
•
•
LON
Ext.
Off
PLR Ext.
Min
SB
MFunction Module type
> LON interface for link-up to LONWORKS-networks, Transceiver FTT 10 A
> PLR interface for link-up to BMS via über WILO-interface converter or onsite coupling modules
> DP interface for an integrated dual pump management of 2 single-head pumps
> Control input ‘ =...10V‘ for remote speed control orhead setpoint adjustments
> Control input ‘Ext.Off‘ for volt-free normally closed contacts
> Control input ‘Ext.Min‘ for volt-free normally closed contacts
> Run signal SBM as volt-free normally open contacts
Functional – Inter Face Modules
![Page 15: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/15.jpg)
Functional – Inter Face Modules
![Page 16: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/16.jpg)
0 – 10 Vdc Speed Control Mode
Remote speed adjustmentsn [RPM]
Vdc1 1,5 3 10
3.0 V = min.
1.5 V = Off
1.0 V = On, min.
n max
n min
Off
![Page 17: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/17.jpg)
Remote setpoint adjustmentH [ft]
Vdc1 10
H max
H min
0 – 10 Vdc Speed Control Mode
![Page 18: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/18.jpg)
IF Module (Inter Face) - Dual
All IF modules have the capability of connection / communication to one other Stratos (IF module required for both pumps). This enables dual control (master/slave) in parallel applications. Benefits include:
• Stand-by operation in the event of a failure (5 min delay)
• 24 hour run time automatic alternation
• Optional operation of both pumps when necessary
• Master/Slave function
• On start-up both controllers flash “MA”
• Press in either red button to set master
• Slave pump follows adjustments made by master
• Ext control wired to master IF Module
![Page 19: Controls and Variable Speed Drives Or the Great Delta PT vs Delta PV Debate VFD and ECM Controls](https://reader033.vdocuments.site/reader033/viewer/2022061516/5519966a5503464d068b47f1/html5/thumbnails/19.jpg)
19
Questions/Comments?