SureFlow Ron Porter LEED AP IEC Oklahoma City Presented by: 1

SureFlow Ron Porter LEED AP IEC Oklahoma City Presented by: 1
Copyright 2012 1

Traditional System Design SureFlow Hydronics SureFlow Unit Design
Topics Fan Coil Basics Traditional System Design SureFlow Hydronics SureFlow Unit Design SureFlow Applications 2

Fan + Coil = Fan Coil Room Air Conditioner
This Is A Fan Coil Fan + Coil = Fan Coil Room Air Conditioner 3

How Do They Work ? Moves air through a coil with: Chilled Water
Hot Water Electric Heat R410a Let’s focus on the water systems… 4

Standard Water Pressure Differential System
FCU FCU FCU FCU Chiller Central Pump Pushes Water Through Piping to Supply Each Fan Coil

How Do We Size The Main Pump ?
2010 PS2 - Hydronics How Do We Size The Main Pump ? 6

Central Pump Horsepower = __Head x GPM__
2010 PS2 - Hydronics Central Pump Horsepower = __Head x GPM__ 3960 x Efficiency 7

Pump Sizing Based On Highest Pressure Drop Circuit
FCU FCU FCU FCU Chiller Calculate All Circuits

How Do We Know The Fan Coils Will Operate As Advertised ?
FCU FCU FCU FCU Chiller Water Always Takes The Path Of Least Resistance

Pipe and Riser Diameters ? Water Pipe Has Resistance To Water Flow
FCU FCU FCU FCU Chiller Water Pipe Has Resistance To Water Flow

Continuity : Water In = Water Out (GPM Per Minute)
2011 IEC - Hydronics Continuity : Water In = Water Out (GPM Per Minute) Velocity : Speed of Travel (Feet Per Second) D2 D1 Flow In “Q” Flow Out “Q” Area1 Vel1 Vel2 Area2 Flow In “Q” = 10 GPM D1= 1 Inch “L” Copper Vel1 = 3.9 Ft Per Second Flow Out “Q” = 10 GPM D2= 2 Inches “L” Copper Vel2 = 1.05 Ft Per Second 11

Pressure drop is defined as:
2011 IEC - Hydronics Pressure drop is defined as: The difference in pressure between any two points on a piece of equipment. D2 D1 Flow In “Q” Flow Out “Q” Area1 Vel1 Vel2 Area2 PD1 PD2 Flow In “Q” = 10 GPM D1= 1 Inch “L” Copper Vel1 = 3.9 Ft Per Second PD1 = 6.71 Ft per 100 Ft Flow Out “Q” = 10 GPM D2= 2 Inches “L” Copper Vel2 = 1.05 Ft Per Second PD2 = 0.29 Ft per 100 Ft 12

Coil Pressure Drop = Cost of Operation
2011 IEC - Hydronics Coil Pressure Drop = Cost of Operation Determined from several parameters- Unit size Coil rows Coil circuits GPM Tube water velocity Water temperature Use IEC Rating Program to determine pressure drop through the coil at actual operating conditions Example @ 3.0 GPM Coil PdFt = 5.9 13

Valve Pressure Drop: Resistance to water flow
2011 IEC - Hydronics Valve Pressure Drop: Resistance to water flow Based on water volume through the valve at Full Open Calculated using Cv Rating Number PdFt = ( GPM / ( x Cv ))^2 14

Typical Ball Valve Pressure Drop:
2011 IEC - Hydronics Typical Ball Valve Pressure Drop: PdFt = ( GPM / ( x Cv ))^2 Ball valve Cv = 5.84 (1/2 inch) GPM = 3 PdFt = (3 / (0.658 x 5.84))^2 PdFt = 0.61 15

Full-Port Ball Valve Pressure Drop:
2011 IEC - Hydronics Full-Port Ball Valve Pressure Drop: PdFt = ( GPM / ( x Cv ))^2 Ball valve Cv = 14.2 (1/2 inch B&K # T) GPM = 3 PdFt = (3 / (0.658 x 14.2))^2 PdFt = 0.10 16

2011 IEC - Hydronics 17 17

Erie Valve Pressure Drop:
2011 IEC - Hydronics VT2213 3.5 Cv (7/16” Port) 25 PSI Close-Off Erie Valve Pressure Drop: PdFt = ( GPM / ( x Cv ))^2 Cv = 3.5 (1/2 inch VT2213) GPM = 3 PdFt = (3 / (0.658 x 3.5))^2 PdFt = 1.7 18

2011 IEC - Hydronics VT2212 2.5 Cv (5/16” Port) 40 PSI Close-Off Erie Valve Pressure Drop: PdFt = ( GPM / ( x Cv ))^2 Cv = 2.5 (1/2 inch VT2212) GPM = 3 PdFt = (3 / (0.658 x 2.5))^2 PdFt = 3.3 19

2011 IEC - Hydronics VT2211 1.0 Cv 60 PSI Close-Off Erie Valve Pressure Drop: PdFt = ( GPM / ( x Cv ))^2 Cv = 1.0 (1/2 inch VT2211) GPM = 3 PdFt = (3 / (0.658 x 1.0))^2 PdFt = 20.8 20

Analyze Combined Unit And Valve Package Pressure Drop
2011 IEC - Hydronics Analyze Combined Unit And Valve Package Pressure Drop FCU @ GPM = 3.0 Ball Valve PdFt = 0.1 Coil PdFt = 5.9 Erie Valve PdFt = 3.3 Total PdFt = 9.4 ÷ 2.33 = 4.0 PSI Diff Total Value Required For Proper Fan Coil Operation 21

Will This Design Operate Properly ?
2011 IEC - Hydronics Will This Design Operate Properly ? 70 PSI 65 PSI Return Units & Valves @ 3.0 GPM Require 4.0 PSI Diff FCU FCU FCU Typical of 20 Units Boiler Pump 60 GPM 60 Ft Head Supply 80 PSI Δ 10 PSI 85 PSI Δ 20 PSI 60 PSI Δ 25 PSI 22

Water Balancing Is Required
2011 IEC - Hydronics Water Balancing Is Required 4 PSI 70 PSI Return Units & Valves @ 3.0 GPM Require 4.0 PSI Diff FCU FCU FCU Boiler Pump 60 GPM 60 Ft Head Supply 5 PSI Δ 1 PSI 80 PSI Δ 10 PSI 60 PSI Δ 25 PSI Low Flow Excessive Flow 23

Cartridge Valves For Automatic Balancing
2011 IEC - Hydronics Cartridge Valves For Automatic Balancing Return Boiler FCU FCU FCU FCU Supply 24

Hays 2517 Automatic Balancing Valve
2011 IEC - Hydronics Hays Automatic Balancing Valve 2-80 PSID range up to 5.5 GPM +/- 10% Accuracy 25 25

Valve Will Add Resistance As Required For Specified Water GPM
2011 IEC - Hydronics Valve Will Add Resistance As Required For Specified Water GPM 26 26

Analyze Combined Unit And Valve Package Pressure Drop
2011 IEC - Hydronics Analyze Combined Unit And Valve Package Pressure Drop FCU @ GPM = 3.0 Ball Valve PdFt = 0.1 Hays Valve PdFt = 4.6 Coil PdFt = 5.9 Erie Valve PdFt = 3.3 Total PdFt = 14 ÷ 2.33 = 6.0 PSI Diff 27

Full-Load Variable Frequency Drive
2011 IEC - Hydronics Full-Load Variable Frequency Drive 70 PSI FCU Δ 10 PSI ΔP Boiler FCU FCU FCU Full Load Pump 60 GPM 60 Ft Head 80 PSI VFD 28

Part-Load Variable Frequency Drive
2011 IEC - Hydronics Part-Load Variable Frequency Drive 70 PSI FCU Δ 10 PSI ΔP Boiler FCU OFF FCU Part Load Pump 45 GPM 80 PSI VFD 29

Direct Return System 70 PSI Δ 10 PSI ΔP 80 PSI VFD Full Load Pump
2011 IEC - Hydronics Direct Return System 70 PSI FCU Δ 10 PSI ΔP Boiler FCU FCU FCU Full Load Pump 60 GPM 60 Ft Head 80 PSI VFD 30

2011 IEC - Hydronics Reverse Return – Balancing is reduced, therefore the need for balancing valves is reduced, but only if all coils have identical ΔP and system pressure differential always equals coil required ΔP. FCU FCU FCU FCU ΔP Chiller VFD 31

System Design Issues Chiller / Boiler Equipment Plant
2011 IEC - Hydronics System Design Issues Chiller / Boiler Equipment Plant Pumps Create Water Pressure Differential Pipes Running To and From Each Unit Valves – On/Off or Modulating Balancing Valves – Flow Regulators Strainers Pressure Relief Valves Variable Speed Drives on Pumps Controls, DDC, Building Energy Management System Installation Labor – vs. – 2/Pipe – vs. – 4/Pipe Test & Balance Maintenance 32

System Complexity Issues There Must Be A Better Way
2011 IEC - Hydronics System Complexity Issues There Must Be A Better Way 33

2008 ASHRAE Handbook HVAC Systems and Equipment Chapter 12.
Thermostat OFF Integrated Circulator Cycles on Thermostat Demand Primary Circuit Water Flow 2008 ASHRAE Handbook HVAC Systems and Equipment Chapter 12.

Primary Circuit Water Flow
Thermostat ON Cool Air Cool Air Cool Air Cool Air Primary Circuit Water Flow 2008 ASHRAE Handbook HVAC Systems and Equipment Chapter 12.

Primary Circuit Water Flow
Thermostat OFF Primary Circuit Water Flow 2008 ASHRAE Handbook HVAC Systems and Equipment Chapter 12.

Massachusetts College of Pharmacy and Health Sciences
Worcester, Massachusetts Average 40% Less Piping Fewer Pipe Hangers Less Insulation

Westin Cupples Station
St. Louis, Missouri Reduced Core Drilling Fewer Joints = Fewer Leaks Contractor Savings

Westin Cupples Station
St. Louis, Missouri

CPF SureFlow Unit What Happened To The Zone Valves and Flow Control Valves ?

Circulator – 1/40 HP 30+ Years In Production Millions In Use
Quiet Operation Chilled Water CERTIFIED Wet Rotor Cartridge Design Internal Flow Check Valve 200 PSI Rating Cycles On-Off (Thermostat Controlled) Low Energy Consumer – 65 Watts

2010 PS2 - Hydronics 44

With Only One Installed Pipe
Two Pipe Cooling With Only One Installed Pipe FAN COIL FAN COIL FAN COIL FAN COIL Water Circulation Rate ≈ 3 GPM per Ton Pump Head & Energy Reduced Chiller

Two Pipe Cooling & Heating “Change Over” With One Installed Pipe
Chiller FAN COIL Boiler

Massachusetts College of Pharmacy and Health Sciences
Worcester, Massachusetts 2-Pipe Cooling and Heating Changeover With Only One Installed Pipe

With Only Two Installed Pipes
Four Pipe Heat & Cool With Only Two Installed Pipes Chiller FAN COIL Boiler

Challenges: What Happens To The Water Temperature ?
Will It Control Humidity ?

Water Temperature Changes As BTUs Are Injected Into The SureFlow Loop
1 Ton 1 Ton 1 Ton 1 Ton 14424t 10448s 13177t 9954s 12052t 9519s Off 52.1ºF 46.6ºF 48.6ºF 42ºF 44.4ºF 46.6ºF Chiller Water Temperature Changes As BTUs Are Injected Into The SureFlow Loop

Cooling Loop Water Pipe Size Design Guide Type L Copper
1” 1-1/4 1-1/2 2 2-1/2 3 GPM 8 16 25 53 85 127 FPS Vel 3.13 4.1 4.53 5.54 5.74 6.01 PdFt / 100Ft 5.66 5.46 5.58 4.57 4 8ΔT 2.7 5.3 8.3 17.7 28.3 42.3 10ΔT 3.3 6.7 10.4 22.1 35.4 52.9

Heating Loop Water Pipe Size Design Guide Type L Copper
1” 1-1/4 1-1/2 2 2-1/2 3 GPM 8 16 25 53 85 127 FPS Vel 3.13 4.1 4.53 5.54 5.74 6.01 PdFt / 100Ft 5.66 5.46 5.58 4.57 4 20ΔT 80 160 250 530 850 1270 25ΔT 100 200 312 662 1062 1587

Cooling Loop Water Temperature
8 Degree Loop Delta-T = 3 GPM per Ton

Peak Load Analysis Sample
10 Tons Peak x 3 GPM per Ton = 30 GPM 1-1/2” L 30GPM = 5.43 fps = 7.55 ftpd/100ft 2” L Copper 30GPM = 3.14 fps = 2.02 ftpd/100ft

Solar Block vs Peak Load Analysis
7.5 Tons Block / 10 Tons Peak = 75% Diversity Ratio

Design For Diversity BLOCK LOAD RATIO With 42F Supply, 3 GPM Per Ton, 75% Ratio Max Actual Water Temperature = 48F

SOME UNITS ARE NOT RUNNING ARE SOME UNITS OVER SIZED ?
Design For Diversity SOME UNITS ARE NOT RUNNING ARE SOME UNITS OVER SIZED ? With 42F Supply, 3 GPM Per Ton, 75% Ratio Max Actual Water Temperature = 48F

SureFlow Allows Adjustment Of The Design For Occupancy
School Classroom vs. Common areas Hotel Rooms Offices Usage patterns, time of day

SureFlow Allows Modification Of The Design For Run Time and Fan Speed
Actual hours of operation with full water flow Good water flow rate results in excellent humidity control Take full advantage of controls capabilities Always recommend automatic fan speed reduction for extended run-time on coil

Horsepower Savings Circulators Only Consume Power When Running
Local Circulators Controlled by Room Thermostats System Strategy: Demand Controlled Pumping The Building Hydronic System Becomes An Energy Management System LEED 2009-NC Credit EAc1 Optimize Energy Performance Up To 19 Points Available

Installation and Maintenance Savings
Complex 2-way valve package = 32 solder joints SureFlow valve package = 16 solder joints

Compound Primary-Secondary Pumping
Common Load Chiller - Or - Heat Exchanger Secondary Pump Primary Pump

Campus Chilled Water Building 1 of X Building 2 of X Central Plant

Replace Your Original Existing 2-pipe FCU….
Load Balance Valves 3 Way Control Valve CW Supply CW Return

…. With a New SureFlow Unit and Have 4-Pipe Performance With Two Pipes
Heating Coil Cooling Coil HW Supply /Return Existing Pipes CW Supply /Return

Case Study Hotel Monaco Washington DC
1839 US Tariff Building – General Post Office Owner: US Department of Interior – Park Service Lease: Kimpton Hotel & Restaurant Group 232 Rooms – AAA 4 Diamond Opened Summer 2002 SureFlow Fan Coils Hotel Monaco Washington DC

Fernando Garcia, P. E. Vice President CTA Consulting Engineers Inc
Fernando Garcia, P.E. Vice President CTA Consulting Engineers Inc. Rockville, MD (301)

Chicago Blackstone Renaissance Hotel 636 South Michigan 332 Rooms
Restoration of 1908 Hotel Opened Fall 2007 1920: Location of the famous “Smoke Filled Rooms” where Warren G. Harding was chosen as the Republican nominee for President. 1940: Franklin Delano Roosevelt’s 3rd-term Democratic Nomination was forged here. 1944: Harry S. Truman stayed here when he received Vice Presidential Nomination. 1952: Dwight D. Eisenhower stayed here during first Republican ballot.

The Nines, The Luxury Collection, Starwood Hotels
Portland, Oregon The Nines, The Luxury Collection, Starwood Hotels Top 9 Floors Guest Rooms Portland’s First 5-Star Hotel Lower 5 Floors is Macys Dept Store Redevelopment of Meier & Frank Department Store National Register of Historic Places Opened Oct 2008 LEED Silver

Elysian / Waldorf Astoria
Chicago Elysian / Waldorf Astoria 60 Stories on East Walton Street in the Gold Coast 52 Private Residences 188 Room Waldorf Astoria Hotel Constructed Renamed Waldorf Astoria Chicago February 1, 2012 AAA Five Diamond TripAdvisor.com Ranked # 1 Hotel in USA Conde Nast Traveler Ranked Best Hotel in USA As of Feb 1, 2012: Hotel rates: start at $395 Condo Sales up to $8 Million Condo Rent: $16,000/month 3-Bed, 3.5-Bath, 3,747 Sq Ft

12,000 Units over 12 Years

LEED Credit Opportunities Installed Cost Savings $$$
Occupant Comfort Reliable Operation Average 40% Less Piping Low Maintenance Pump Energy Savings For Owner $$$ Cool Air Cool Air Cool Air Cool Air Easy To Design LEED Credit Opportunities Installed Cost Savings $$$ 4 – Pipe Performance With 2 Installed Pipes

Application: SureFlow

Standard Piping Method Part Load Pump Controls
FCU FCU FCU FCU Delta P Chiller We’ve continued to up grade the system with DDC controls, and VFD’s VFD DDC Part Load Pump Controls

Pumps Create Water Pressure Differential Pipes Running To and From Each Unit Valves – On/Off or Modulating Balancing Valves – Flow Regulators Strainers Pressure Relief Valves Variable Speed Drives on Pumps Controls, DDC, Building Energy Management System Installation Labor – vs. – 2/Pipe – vs. – 4/Pipe Test & Balance Maintenance IEC looked at all the system design issues and tried to come up with a system that would reduce or eliminate many of them. The system we came up with is called Sure Flow.

Integrated Circulator Cycles on Thermostat Demand Thermostat OFF
The Sure Flow system saves installation $, and pumping energy. The Sure Flow system provides two pipe change over – having individual supply and return pipes using only a single pipe and a four pipe continuous heat and cool with only two pipes. All 4 star rated hotels need in order to get that rating the ability to simultaneous heat and cool. Primary Circuit Water Flow

Less Core Drills on Renovation
SureFlow Average 40% Less Piping Less Core Drills on Renovation Contractor Savings This unit/ system was installed at MIT. When non air conditioned existing building want to add hydronic A/C Sure Flow saves $ with reduced core drilling. Thick Concrete Floors are expensive to drill thru.

SureFlow Circulator – 1/40 HP
30+ Years In Production Millions In Use Quiet Operation Chilled Water CERTIFIED Wet Rotor Cartridge Design Internal Flow Check Valve 200 PSI Rating Cycles On-Off (Thermostat Controlled) Low Energy Consumer – 65 Watts This is the Taco pump we use – designed for chilled water, by having a space between the pump housing and motor/control box allowing for air circulation to eliminate the possibility of condensation forming in the electrical side of the pump . The pump is very energy conservative using only 65 watts the amount of energy a light bulb uses. IEC has over 10,000 installations spanning 11 years and to date we have not had a single warranty or replacement order for theses pumps. This is not to say that the owners may have purchased them elsewhere.

FAN COIL FAN COIL FAN COIL FAN COIL FAN COIL FAN COIL FAN COIL FAN COIL As mentioned two pipe cooling with only one pipe. As you move along the first FCU gets the coldest water. The units are using a common pipe for both the supply and return therefore the units at the end of the loop see entering water temps a few degrees warmer than the first unit. In order to compensate for the higher entering water temp the fan coils at the end of the loop receive they will need a deeper coil – say a 4 or 5 row instead of a 3 row coil. Chiller Two Pipe Cooling With Only One Installed Pipe

FAN COIL FAN COIL FAN COIL FAN COIL Chiller Single Pipe with Change Seasonal over required. Boiler Two Pipe Heat & Cool With Only One Installed Pipe

SureFlow System Pumping
1 Ton 1 Ton 1 Ton 1 Ton 14424t 10448s 13177t 9954s 12052t 9519s Off 52.1ºF 46.6ºF 48.6ºF 42ºF 44.4ºF 46.6ºF Chiller Here we’re showing what I mentioned earlier – supply temps increase but the increase may not be as much as you think. Not all Units run at the same time. When building diversity is considered you might already have the safety factor included in your design. Central Pump Is NOT Responsible For Pressure Drop Of Coil Or Valve Packages

Block vs Peak Load Analysis
7.5 Tons Block / 10 Tons Peak = 75% Diversity Ratio Solar Exposure Block Load vs Peak Load and Building Diversity. The sun solar load doesn’t shine on all sides of the building at the same time. Occupancy doesn’t always occur at the same time the solar load is greatest either. Look at the hospitality industry – solar load peaks at say 3pm, most hotel rooms aren’t occupied until 6pm.

SureFlow Installation - Case Study
1839 US Tariff Building – General Post Office Owner: US Department of Interior – Park Service Lease: Kimpton Hotel & Restaurant Group 232 Rooms – AAA 4 Diamond Opened Summer 2002 SureFlow Fan Coils 2 foot thick floors – big buck savings in core drilling here Hotel Monaco Washington DC

Application: SureFlow

Standard Piping Method
Chiller FCU Notice all the resistance or pressure drop the main circulating pump has to pump against. Two isolation valves, a strainer, a balance valve, and flow regulator.

Standard Piping Method Primary-Secondary Pumping
FCU FCU FCU FCU Chiller Here we’ve added a by-pass loop to ensure flow, and added a primary pump to improve the efficiency of the system. Primary-Secondary Pumping

Standard Piping Method Part Load Pump Controls
FCU FCU FCU FCU Delta P Chiller We’ve continued to up grade the system with DDC controls, and VFD’s VFD DDC Part Load Pump Controls

Pumps Create Water Pressure Differential Pipes Running To and From Each Unit Valves – On/Off or Modulating Balancing Valves – Flow Regulators Strainers Pressure Relief Valves Variable Speed Drives on Pumps Controls, DDC, Building Energy Management System Installation Labor – vs. – 2/Pipe – vs. – 4/Pipe Test & Balance Maintenance IEC looked at all the system design issues and tried to come up with a system that would reduce or eliminate many of them. The system we came up with is called Sure Flow.

Integrated Circulator Cycles on Thermostat Demand Thermostat OFF
The Sure Flow system saves installation $, and pumping energy. The Sure Flow system provides two pipe change over – having individual supply and return pipes using only a single pipe and a four pipe continuous heat and cool with only two pipes. All 4 star rated hotels need in order to get that rating the ability to simultaneous heat and cool. Primary Circuit Water Flow

Integrated Circulator Cycles on Thermostat Demand Thermostat ON
Cool Air Cool Air Cool Air Cool Air Notice we’ve eliminated the balance valve and flow requlator and replaced them with a 1/40 hp circulating pump designed for the coil pressure drop. The Isolation valves need to remain and sometimes a strainer can be required. Primary Circuit Water Flow

Design Considerations: Piping Circuits - Diverting Series One-pipe diverting series circuits – “when coupled with compound pumping systems, series circuits can be applied to multiple control zones on larger commercial or institutional systems.” The Sure Flow system was not invented by IEC. It has been around and supported and endorsed for some applications by ashrae. It is not proprietary – our competitors can use a taco load match system in conjunction with fan coils. IEC is the only Fan coil manufacturer that incorporates the two together. 2008 ASHRAE Handbook HVAC Systems and Equipment Chapter 12.

Less Core Drills on Renovation
SureFlow Average 40% Less Piping Less Core Drills on Renovation Contractor Savings This unit/ system was installed at MIT. When non air conditioned existing building want to add hydronic A/C Sure Flow saves $ with reduced core drilling. Thick Concrete Floors are expensive to drill thru.

SureFlow Circulator – 1/40 HP
30+ Years In Production Millions In Use Quiet Operation Chilled Water CERTIFIED Wet Rotor Cartridge Design Internal Flow Check Valve 200 PSI Rating Cycles On-Off (Thermostat Controlled) Low Energy Consumer – 65 Watts This is the Taco pump we use – designed for chilled water, by having a space between the pump housing and motor/control box allowing for air circulation to eliminate the possibility of condensation forming in the electrical side of the pump . The pump is very energy conservative using only 65 watts the amount of energy a light bulb uses. IEC has over 10,000 installations spanning 11 years and to date we have not had a single warranty or replacement order for theses pumps. This is not to say that the owners may have purchased them elsewhere.

FAN COIL FAN COIL FAN COIL FAN COIL FAN COIL FAN COIL FAN COIL FAN COIL As mentioned two pipe cooling with only one pipe. As you move along the first FCU gets the coldest water. The units are using a common pipe for both the supply and return therefore the units at the end of the loop see entering water temps a few degrees warmer than the first unit. In order to compensate for the higher entering water temp the fan coils at the end of the loop receive they will need a deeper coil – say a 4 or 5 row instead of a 3 row coil. Chiller Two Pipe Cooling With Only One Installed Pipe

FAN COIL FAN COIL FAN COIL FAN COIL Chiller Single Pipe with Change Seasonal over required. Boiler Two Pipe Heat & Cool With Only One Installed Pipe

With Only Two Installed Pipes
FAN COIL FAN COIL FAN COIL FAN COIL Chiller Four Pipe Comfort using only two pipes Boiler Four Pipe Heat & Cool With Only Two Installed Pipes

SureFlow System Pumping
1 Ton 1 Ton 1 Ton 1 Ton 14424t 10448s 13177t 9954s 12052t 9519s Off 52.1ºF 46.6ºF 48.6ºF 42ºF 44.4ºF 46.6ºF Chiller Here we’re showing what I mentioned earlier – supply temps increase but the increase may not be as much as you think. Not all Units run at the same time. When building diversity is considered you might already have the safety factor included in your design. Central Pump Is NOT Responsible For Pressure Drop Of Coil Or Valve Packages

Coil Pressure Drop is Redesigned to Match Circulator Pump Curve
2011 IEC - Hydronics Coil Pressure Drop is Redesigned to Match Circulator Pump Curve Also as mentioned the pump/coil system is designed to match the individual coil pressure drop 102

Cooling Loop Water Temperature 8 Degree Loop Delta-T = 3 GPM per Ton
Typical system with a 3 gpm /ton and a 8 degree delta max 50 degree water temp. 8 Degree Loop Delta-T = 3 GPM per Ton

SureFlow Peak Load Design
Typical layout pipe down a center corroder feeding rooms on opposite sides of it. Total of 10 tens – 3gpm/ton = 30 gpm velocity thru the pipe depending on 1.5 or 2 inch pipe diameter. 10 Tons Peak x 3 GPM per Ton = 30 GPM 1-1/2” L 30GPM = 5.43 fps = 7.55 ftpd/100ft 2” L Copper 30GPM = 3.14 fps = 2.02 ftpd/100ft

Block vs Peak Load Analysis
7.5 Tons Block / 10 Tons Peak = 75% Diversity Ratio Solar Exposure Block Load vs Peak Load and Building Diversity. The sun solar load doesn’t shine on all sides of the building at the same time. Occupancy doesn’t always occur at the same time the solar load is greatest either. Look at the hospitality industry – solar load peaks at say 3pm, most hotel rooms aren’t occupied until 6pm.

Design For Diversity With 42F Supply, 3 GPM Per Ton, 75% Ratio Max Actual Water Temperature = 48F Using a 75% diversity the delta is now 6 degrees or 48 degrees instead of 50. BLOCK LOAD RATIO

Warmer Supply Temperature?
With 44F Supply, 3 GPM Per Ton, 75% Ratio Max Actual Water Temperature = 50F The units receiving warmer water 44 degree supply sill can dehumidify BLOCK LOAD RATIO

10,000 Units over 10 Years

SureFlow Installation - Case Study
1839 US Tariff Building – General Post Office Owner: US Department of Interior – Park Service Lease: Kimpton Hotel & Restaurant Group 232 Rooms – AAA 4 Diamond Opened Summer 2002 SureFlow Fan Coils 2 foot thick floors – big buck savings in core drilling here Hotel Monaco Washington DC

Fernando Garcia, P. E. Vice President CTA Consulting Engineers Inc
Fernando Garcia, P.E. Vice President CTA Consulting Engineers Inc. Rockville, MD (301) Received a coveted ASHRAE Tech Award for the system.

Dwight D. Eisenhower stayed during first Republican ballot in 1952.
Chicago Blackstone Renaissance Hotel 636 South Michigan 332 Rooms Restoration of 1908 Hotel Opened Fall 2007 Location of the famous “Smoke Filled Rooms” where Warren G. Harding was chosen as the Republican nominee for President in June 1920. Franklin Delano Roosevelt’s 3rd-term Democratic Nomination was forged in 1940. Harry S. Truman stayed when he received 1944 Vice Presidential Nomination. Dwight D. Eisenhower stayed during first Republican ballot in 1952. Other buildings. Remember this system is not right for all systems.

Part of The Luxury Collection, Starwood Hotels & Resorts
Portland, Oregon The Nines Hotel Part of The Luxury Collection, Starwood Hotels & Resorts Top 9 Floors Rooms Lower 5 floors is Macy’s Redevelopment of Meier & Frank Department Store National Register of Historic Places Opened October 16, 2008 LEED Silver

New Orleans Monaco Hotel 250 Units Historic 1926 Masonic Temple Lodge
June 2001 Conversion to a 4-Star Luxury Hotel Kimpton Sold to Dimension Development Co. Reopened 2007 as the Hilton Saint Charles Humidity Kept Under Control

Pump Energy Savings For Owner $$$
Occupant Comfort Reliable Operation Average 40% Less Piping Low Maintenance Pump Energy Savings For Owner $$$ Cool Air Cool Air Cool Air Cool Air Easy To Design LEED Credit Opportunities Installed Cost Savings $$$ 4 – Pipe Performance With 2 Installed Pipes

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