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Interested in conducting your own webinar? Email [email protected]
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ECONET where renewableand recoverable energy unite
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ECONET where renewableand recoverable energy unite
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Energy exchangers
Energy recovery systems are very
common in current building designs
There are 3 common energy recoverysystems on the market.
1. The rotary heat exchanger (RHE)
2. The plate heat exchanger (PHE)
3. The run around coils (RAC)
ECONET
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Energy exchangers
There are a number of things to be considered when selecting an energy
recovery system:
Energy recovery efficiency combined with the pressure drop
Space in the equipment room
Location of air handling units
The duct connection
Leakage and odor transfer (cross-contamination in the recovery system)
Activity conducted in the building
Need for latent cooling recovery
Types of energy sources
ECONET
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Energy sources:
Limited traditional energy sources(oil, gas, coal etc.)
Increase of energy consumptionon a global scale
Increase in energy prices
The Environment:
Global warming, CO2
Emissions, pollution
Legislation: Global and regional regulations/
restrictions
Pasterze Glacier, 1875
Pasterze Glacier, 2004
Why should we reduce the energy consumption ?
ECONET
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What to optimize inside current AHUs?
There are a lot of
components to beoptimized in an AHU:
Recovery device
Fans
Motors
Frequency inverters Pressure drop thru
components
Velocity
Size
External issues Etc.
Exhaustair
Supply air
Extract air
Outdoorair
+
LWA extract
qextract
LWA supply
qsupply
pext in poutl pext outlp4 p inlp1 p2 p3
rotor drive motor trans fan
PmainLWA amb
pfan
Exhaustair
Supply air
Extract air
Outdoorair
+
LWA extract
qextract
LWA supply
qsupply
pext in poutl pext outlp4 p inlp1 p2 p3
rotor drive motor trans fan
PmainLWA amb
pfanpfan
ECONET
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The run around coil system
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Run Around Coils
Run around coils (RAC) are one of
the 3 most common types of energyrecovery systems. The traditionalRAC is a well known system and ithas been used for decades.
ECONET is an advanced form ofrun around coil and was introducedby Flkt Woods in 2000.
ECONET
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Run around coils: Advantages
No risk of cross-contamination
Flexible installation, supply air andexhaust air units can be separated.
Can be used for applications withcorrosive and polluted exhaust air.
Moderate/good energy recoveryefficiency
Easy to optimize recovery withunbalanced air flows
ECONET
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Run around coils: Disadvantages
More complex installation
Maintenance of the liquid/recovery circuit
No latent cooling recovery
Normally moderate energy recoveryefficiency
ECONET
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Advantages: No risk of cross-contamination Flexible installation, supply air and exhaust air units can be separated.
Can be used for applications with corrosive and polluted exhaust air. Moderate/good energy recovery efficiency Easy to optimize recovery with unbalanced air flows
Disadvantages: More complex installation Maintenance of the liquid/recovery circuit No latent cooling recovery Moderate energy recovery efficiency
Applications:
Due to a flexible solution combined with a mod/good recovery efficiency, the system is suited for: No leakage can be tolerated. The supply and the exhaust air units have to be separated from each other. Relatively simple to install it in existing AHUs (upgrading of the functionality) Hygiene applications Applications with corrosive or polluted exhaust air No need of moisture recovery
ECONET: Where process or waste heat available
Limited space in the equipment room High recovery efficiency
Commercial buildings Hospital, hygiene applications Pharmaceutical applications Housing, depending on the market
Run around coils: Summary
ECONET
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The unique advantages ofthe ECONETsystem.
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Unique advatages of ECONET
1 component, 4 functions:
Heat recovery Additional heating
Cooling recovery
Additional cooling
Lower pressure drops
Shorter AHU
Fewer components
ECONET
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Unique advatages of ECONET
Increased heat recovery efficiency
6075% performance
Able to use cooling recovery
Always prepared for cooling andcooling recovery
Possibility to utilize process/ wasteheat
Perfect for district cooling/heating
Pre-fabricated pump unit
ECONET
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The delivery
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ECONET : Basics, coils
Consists of heat exchangers (coils) in the
supply air and in the exhaust air. The coils are composed of copper pipes
with profiled aluminum or copper fins. Thefin pitch is 2-4 mm.
For highly corrosive environment the fins
are either epoxy coated or of stainlesssteel.
Both coils are equipped with drip trays.
For high air velocities, coil are equipped
with droplet eliminators.
Several capacity variants of the coilsavailable for each AHU size (2 to 12 rows)
ECONET
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ECONET : Basics, pump unit and controls
ECONET
ECONET pump units are available in 2 versions:
ECONET standard
ECONET compact
Common for both versions:
Pump unit for energy recovery/heating and
cooling
Pipe work, anti-rust painted and insulated
Controls for energy recovery function
Frequency inverter for pump
All required sensors mounted and cabled
A floor-mounted stand for all pump unit sizes
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ECONET : Basics, pump unit and controls
ECONET pump units are available in 2
versions:
The main difference between theversions:
ECONET standard
Equipped with a separate controllerfor optimization of energy recovery.Controls with additional functions.
ECONET compact
Equipped with a multifunctional
frequency inverter, with integratedcontrols for optimization of energyrecovery. Limited additional functions.
ECONET
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ECONET : Basics, pump unit and controls
ECONET pump units are available in 2
versions:
Which version to choose?
Choose ECONET standard if:
Dry-box solution
Twin pump solution Efficiency calculation
Energy calculation
Lon and BacNet
Otherwise choose ECONET compact:
A compact and a more cost efficientsolution
ECONET
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ECONET Exchanger package
A pre-fabricated exchanger package
(accessory), consisting of:
Plate heat exchanger for additionalheating.
Plate cooling exchanger foradditional cooling.
Shut off valves. Drain valve, filling valve.
A stand for the exchanger packagedesigned to stand on the floor.
Expansion vessel with safety valve.
It is possible to order an integratedsystem, including both the pump unitand the exchanger package.
ECONET
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The function of ECONET
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Control box, ECONET Control box, AHU/BMS
Energy recovery
Safety functions
start/stopheat recovery 0-10 V
cooling recovery on/offcooling function on/off
A-Alarm on/off -->3 x temp 0-10V -->
Option:
Temp. efficiency 0-10V -->
B-Alarm for twin pump -->
Control of supply air temp.:heating/cooling valves etc...
Other AHU functions
ECONET: Function, controls
ECONET
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ECONET: Function, heat recovery + heating
Mode 1, a cold winter day
Heat recovery + additional heating:
The system optimizes the heatrecovery by controlling the liquid flow.
Additional heating, controlled by the
heating valve. Internal frost and ice protection
Control signals:
Heat recovery signal 100% (10V)
BMS controls the heating valve 100%
HRC
Supply air
Exhaust air
70%
73
30%
10 68
80
ECONET
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ECONET: Function, heat recovery
Mode 2, a normal winter day.
Only heat recovery, no need of additionalheating:
The system optimizes the heatrecovery by controlling the liquid flow.
Control signals:
Heat recovery signal 100%
100%
HRC
Supply air
Exhaust air
100%
73
41 62
66
ECONET
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ECONET: Function, reduced heat recovery
Mode 3, a spring/autumn day.
Only heat recovery, reduced heatrecovery:
The system is too efficient andreduces the heat recovery by
reducing the liquid flow.
Control signals:
Heat recovery signal 0%< sign
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ECONET: Function, no recovery
Mode 4, changing from winter to
summer.
No need for heating or cooling ofsupply air:
The pump stops
Control signals:
Heat recovery signal 0% (0V)
Supply air
Exhaust air
62 62
ECONET
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ECONET: Function, cooling, no recovery
Mode 5; a normal summer day
Additional cooling:
No cooling recovery, due to the airtemperatures.
The system optimizes the liquid flow
for additional cooling. Additional cooling, controlled by the
cooling valve.
Control signals:
Cooling signal on Heat recovery signal 0%
BMS controls the cooling controlvalve
onCooling
Supply air
Exhaust air
100%
68 60
55
75
ECONET
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ECONET: Function, cooling recovery + cooling
Mode 6, a hot summer day
Additional cooling + cooling recovery:
The system optimizes the coolingrecovery by controlling the liquid flow.
Additional cooling, controlled by the
cooling valve.
Control signals:
Cooling signal on
Cooling recovery signal on
Heat recovery signal 0% BMS controls the cooling valve
onCooling
rec.
Supply air
Exhaust air
25%
75
75%
89 60
51
ECONET
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ECONET: Function, cooling recovery (IEC) + cooling
Mode 6 optional, an even hotter summer
day with the additional function, IEC
IEC = indirect evaporative cooling
Additional cooling + cooling recovery(IEC):
The same principles as normalcooling recovery, but by using ahumidifier in the exhaust air. Thecooling power can be reduced evenmore.
Normal cooling power reduction: 25%
IEC cooling power reduction: 45%
More on this in a later sectionon
Coolingrec.
Supply air
89 60
51
Exhaust air45%
66 75
55%
ECONET
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Energy sources for theECONETsystem.
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ECONET: Heating energy sources
What is Acceptable?
Traditional energy sources, gas, oil,electricity, pellets, etc.
What is Optimal?
ECONETcan utilize warm water
(energy) from 77-86.
Waste heat (condensate heat) fromchillers
Waste heat from industrial processes
Heat pumps District heating
Return water from district heating
Supply air
Exhaust air
70%
73
30%
10 68
80
ECONET
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ECONET: Cooling energy sources
What is Acceptable?
A traditional chiller.
What is Optimal?ECONETcan utilize cold water
(energy) of up to 50-53.
Cooling energy from soil or sea(geothermal)
Optimized chiller
District cooling
IEC, indirect evaporative coolingSupply air
89 60
51
Exhaust air 45%
66 75
55%
ECONET
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What does IEC mean ?
To clarify the function of Indirect
evaporative cooling (IEC)
IEC is a way of getting more coolingrecovery from the exhaust air.
The idea is to humidify the exhaust airwith water. The water evaporates anddecreases the air temperature and thecooling recovery becomes even moreeffective.
Thanks to the recovery system (RAC)there is no risk of cross contamination
between the air streams which avoidsthe risk of getting humid air back intothe supply air.
Supply air
89 60
51
Exhaust air 45%
66 75
55%
ECONET
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What are the benefits of IEC ?
It is a good system for applications
where it is of importance to cut of thepeak loads from the chiller. In thiscase the chiller size can be reducedby approx. 45%.
For markets with warmer climates it
reduces the additional cooling energyas well.
Supply air
89 60
51
Exhaust air 45%
66 75
55%
ECONET
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The impact on the cooling network
Two cooling examples, one with
additional cooling combined with coolingrecovery the other one with coolingrecovery with IEC.
Cooling with ECONET has followingbenefits:
Reduced size of chiller
Reduced liquid flow and pipe work
A higher evaporating temperature inthe chiller gives us a smaller and amore efficient chiller
71F
78F
Supply air
89 60
51
Exhaust air 45%
66 75
55%
Supply air
Exhaust air
25%
75
75%
89 60
51
ECONET
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The impact on the cooling network, power
Reduced size of chiller due to cooling recovery
Reduced liquid flow and pipe work
Smaller and a more efficient chillerSupply air
32C 16C
11C
Exhaust air 45%
19C 24C
55%
Supply air
Exhaust air
25%
24C
75%
32C 16C
11C
Traditional
No cooling recovery
ECONET+IEC
ECONET
Chiller
55%
75%
100%
ECONET
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The impact on the cooling network, cold water flow
Reduced size of chiller Reduced liquid flow and pipe work
due to hight
Smaller and a more efficient chillerSupply air
32C 16C
11C
Exhaust air 45%
19C 24C
55%
Supply air
Exhaust air
25%
24C
75%
32C 16C
11C
Traditional
No cooling recovery
ECONET+IEC
ECONET
Chiller
30% (50/68)
30% (50/75)
100% (42/53)
ECONET
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The impact on the cooling network, temperatures
Reduced size of chiller Reduced liquid flow and pipe work
Smaller and more efficient chiller
due to a higher evaporatingtemperature.
Supply air
32C 16C
11C
Exhaust air 45%
19C 24C
55%
Supply air
Exhaust air
25%
24C
75%
32C 16C
11C
Traditional
No cooling recovery
ECONET+IEC
ECONET
Chiller
30% 50/68
30% 50/75
100% 42/53
ECONET
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ECONETcan protect yoursupply air filter as well
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ECONET: Special protection of the supply air filter
Basics:
In some regions, there is a need toprotect the supply air filter.Otherwise the high humidity undercertain outdoor air conditions maydamage the filter.
To protect the filter a pre-heater isinstalled before the filter, heating theoutdoor air for approx 35 F
The negative aspect of a traditionalpre-heater is that the systemdestroys the heat recovery.
ECONET
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ECONET: Special protection of the supply air filter
Solution:
The preferred solution is to use a pre-heater combined in the heat recoverycircuit.
This has following benefits: Heat recovery efficiency is
maintained
No primary heat connections tothe pre-heater
No risk of frozen pre-heater coils
ECONET
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ECONET: Dry box solution, summary
A system for protection of the supplyair filter
Advantages: Savings in heating energy
consumption due to a more efficientsystem
Savings in fan energy consumption,
due to fewer/thinner coils (not asdeep)
Savings in plumbing, due to noprimary heating connections to thepre-heater
Savings in controls, due to no
separate controls of the pre heater.
Safer system due to no hot watercoils in the supply air.
ECONET
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Benefits with ECONET
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ECONET: Saves space in the equipment room
1 coil in the supply air instead of 3 coils
(recovery + heating + cooling). Reduction of the AHU length:
By 3 6
Reduction of the AHU foot-print
Reduction of the AHU weight:
By 800 - 1,000 lbs.
Summary
More space to rent
Easier to install the units
Easier maintenance Possibility to use bigger AHUs
More air, better efficiency, etc.
+ 48
ECONET
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ECONET: Reduces installation time
A pre-fabricated pump unit with
integrated controls for energyrecovery, including all necessarysensors, naturally reduces theinstallation time and the potential formistakes on site.
ECONET
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ECONET: Applications
Everywhere, where there is a need
for a run around coil solution,including particularly Hygiene
applications.
Everywhere, where waste heat is
available.
Everywhere, where there is a desireto optimize the cooling system.
Everywhere, where plant room spaceis restricted.
Everywhere, where there is a need toprotect the supply air filter.
ECONET
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Controls: Assembly andinstallation
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Standard:
Power supply to the ECONETcontroller
Power supply to the frequencyinverter/inverters
Supply air flow transmitter Assembly of the transmitter Wiring between the transmitter
and the ECONET control box
Wiring between the ECONET and
the BMS system
Or/and network communicationModbus, Lon
Automation and electricity on site
GT
41
GT
40
GP
40
GT
42
GP
41
GF
10
AI
AO
DI
DO
AI
AO
DI
DO
Alarm
Start
Cooling
Cooling recovery
Heat recovery
A Alarm
Temp GT40
Temp. GT41
Temp GT42
Optional:
ECONET
AHU/BMS
Wiringonsite
Wiring on site
Optional
Pump indication
SC
40
SV
40
ECONET
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Control inputs:
Start (digital on/off) Cooling start (digital on/off)
Cooling recovery start (digital on/off)
Heat recovery signal (analog 0-10V)
GF10 Air flow signal (analog 0-10V)
Automation and electricity on site, ECONET BMS
Control outputs:
A-Alarm (digital on/off) B-Alarm (option) (digital on/off)
P40 Pump indication (digital on/off)
GT41 (analog signal, 0-10 V)
GT42 (analog signal, 0-10 V) GT40 (analog signal, 0-10 V)
Network communication chosen(LON, Modbus)
All integration tasks such as
e.g. binding and activating ofthe address between theECONET controller and theBMS system.
ECONET
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Additional functions, which hasto be chosen separately:
*) Efficiency and energycalculation, wiring andassembling of additionalsensors
**) Twin pump solution
***) Network
Automation and electricity on site, ECONET BMS
Control inputs:
GT 00,10,20,21: air temperature
sensors *)
GT30, additional liquid temperaturesensor *)
GF20: air flow signal *)
Control outputs:
Efficiency (analog 0-10V) *)
B-Alarm (digital on/off) **)
Network communication (LON,Modbus) ***)
All integration tasks such ase.g. binding and activating ofthe address between theECONET controller and theBMS system.
ECONET
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Piping: Assembly andinstallation
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Standard:
Assembly of the pump unit Pipes from the exhaust air unit
to the pump unit Pipes from the exchanger
packages to the pump unit Pipes from the supply air unit
to the pump unit
Available assembly of theexchanger package
Pipes from the exchangerpackages to the pump unit
Pipes, valves on the primaryside of the exchanger package
Piping on site
ECONET
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Additional functions, which hasto be chosen separately:
If the exchanger package notdelivered by FWG
Expansion vessel
Heat exchanger
Cooling exchanger
Connection for filling
Safety valve
If dry box solution chosen
Pipes between the twosupply air coils
Piping on site
Other necessary components asset in the document, such as:
External shut-off valves
Automatic air purging valvescombined with manual airpurging valves
Air purging valve for microbubbles
Filter
Charging equipment
Water traps
Anti-freeze liquid Filling of the system
Air purging of the system
ECONET
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The most important issues to prevent leakage:
1. System filled up with right kind of glycol, Etylen glycol mixture for HVAC purpose2. Use Pre mixed liquid
3. If mixed on site, then wait at least 24 h to get rid of air in the liquid
4. Do not use the ECONET pump to fill or/and to clean the system
5. Be sure that You get rid of all flushing/cleaning liquid before filling the system
6. Dont run the pump dry (air), the pump sealing burns and get destroyed
1. Use the air purging screw on the pump to get rid of air from the pump2. Use automatic air purging valves combined with manual air purging valves3. The first weeks the manual valve open and the automatic valve working4. When the air is out then close the manual valve
7. After some time check that no air has come in to the system1. If air then open the manual air purging valve, if continuous problem, check leakage
8. Expansion vessel on the suction side of the pump, safety valve opening pressure min 3 bar
9. Use a closed liquid filling system.1. No open filling vessel, risk of bacterial growth, later on might pump in to the system
10. Check the liquid quality, colour, freezing point etc
Avoid leakage in the future: Top 10
ECONET
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Start-Up and Maintenance
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The most important checks when starting up ECONET:
1. Check all pipe connections (counter flow)
2. System filled up with right kind of glycol
3. System purged of air and has an air purging system
4. Expansion vessel on the suction side of the pump
5. Electricity connection to ECONET frequency inverter and control box6. Controls connected
7. ECONET gets the supply air flow
8. Nothing on manual drive (frequency inverter, by-pass valve)
9. Configure the ECONET controller
10. Go through the start up protocol and note if something is not perrequirements.
Start-up: Top 10
ECONET
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Liquid status Check the freezing point of the frost protection fluid. Check the system pressure and top up with ethylene glycol mixture if necessary.
Coils Check that the finned surfaces of the coils are not dirty, clean if necessary.
Water trap Check that water is present in the water trap for the exhaust air and supply air coils.
Air purging Check frequently in the beginning and after the first year. Stop the pump and wait a couple of hours to make sure that the air bubbles have risen to
the highest points in the system, open/close all valves in the system so that trapped air canbe removed.
Valve checking
Shut down the system and open/close every valve to make sure it has a smooth operation.
Pump seals Check the seals and if there is too much leakage, change the seals.
ECONETchecks
ECONET
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Efficiency calculation
Effi i l l i h
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Efficiency calculation, heat recovery
The normal way of calculating the heat
recovery efficiency is the temperatureefficiency over the supply air coil:
= (GT10-GT00)
(GT20-GT00)
Where:
GT00, air temperature, outdoor
GT10,air temperature, supply
GT20, air temperature, exhaust
GT
41
GT
40
GP
40
GT
42
GP41
GF
10
GT
10
GT
00
GT
20
GT
21GF
20
GT
30/50
SV
40
ECONET
This formula can not be used forECONET if additional energy isconnected to the system.
Effi i l l ti h t
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Efficiency calculation, heat recovery
In the formula for ECONET we have to
exclude the impact of the additional energy:
= (GT42-GT41) x (GT10-GT00)
(GT40-GT41) x (GT21-GT00)
Where:
GT00, air temperature, outdoor GT10, air temperature, supply
GT20, air temperature, exhaust
GT40, liquid temperature, supply in
GT41, liquid temperature, supply out
GT42, liquid temperature, exhaust out
GT
41
GT
40
GP
40
GT
42
GP41
GF
10
GT
10
GT
00
GT
20
GT
21GF
20
GT
30/50
SV
40
ECONET
Effi i l l ti li
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Efficiency calculation, cooling recovery
The normal way of calculating the
cooling recovery efficiency is thetemperature efficiency over the supplyair coil:
= (GT10-GT00)
(GT20-GT00)
Where: GT00, air temperature, outdoor
GT10, air temperature, supply
GT20, air temperature, exhaust
GT
41
GT
40
GP
40
GT
42
GP41
GF
10
GT
10
GT
00
GT
20
GT
21GF
20
GT
30/50
SV
40
ECONET
This formula can not be used forECONET if additional energy isconnected to the system.
Effi i l l ti li
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Efficiency calculation, cooling recovery
In the formula for ECONET we have to
calculate over the exhaust air due topossible risk of condensation of water inthe supply air coil:
= (GT21-GT20)
(GT00-GT20)
Where:
GT00, air temperature, outdoor
GT20, air temperature, exhaust
GT21, air temperature, extract
GT
41
GT
40
GP
40
GT
42
GP41
GF
10
GT
10
GT
00
GT
20
GT
21GF
20
GT
30/50
SV
40
ECONET
Effi i l l ti h t l l t ?
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Efficiency calculation, where to calculate ?
Calculation alternative 1:
The easiest way to calculateefficiency for an ECONET system isto do it in the BMS system
The BMS system usually have thetemperatures on the air side:GT00,10,20,21 and gets GT40,41
and GT42 from the ECONETcontroller by 0-10V signals.
Calculation alternative 2:
If temperature efficiency calculation is
chosen to be calculated by theECONET controls, then the followingsensors are included in the deliveryby the manufacturer.
GT
41
GT
40
GP
40
GT
42
GP41
GF
10
GT
10
GT
00
GT
20
GT
21GF
20
GT
30/50
SV
40
ECONET
Efficienc calc lation e al ation ?
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Efficiency calculation, evaluation ?
To be able to analyze the result, you
have to know more: Balance of air flows
Humidity in the air
And keep in mind that a calculatedefficiency only shows a trend and is notexact due to:
Tolerances of the temperaturesensors
Tolerances of the air flow sensors
Location of the sensors
A heat recovery efficiency of:
= 63.45 %
ECONET
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Applications
Application: Supermarket
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Application: Supermarket
Why ECONET?
More than 40 ECONET references inSupermarkets
Waste/Condensate heat available.
Waste heat available from thechillers, 24 hr/day.
Perfect for ECONET and most ofthe year the super market is self-supporting concerning heatingenergy.
Variation of the need of fresh air.
ECONET is suited for VAVsystem due to continuousoptimization of energy recovery.
ECONET
Application: Supermarket additional energy
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Application: Supermarket, additional energy
Piping of the energy sources:
Usually ECONET is equipped withboth heating and cooling function
Heating and cooling sources:
Heating 1: Waste heat fromchillers
Heating 2: Primary heating (forsafety if no waste heat available)
Cooling: Traditional cooling orother
ECONET
Application: University combined with geothermal
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Application: University combined with geothermal
Why ECONET ?
More than 100 ECONETUniversityreferences
Flexibility with run around coils.
Functionality of the premises mightchange.
Long running hours
Variation of the need of fresh air
Sometimes combined with otherECONET unique functions, like
thermal energy.
ECONET
Application: Soil energy geothermal
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Application: Soil energy - geothermal
Heating function, soil energy -> Heat pump 86 -> AHU
heat pump
Soil/geothermal
VAV device
ECONET
Application: Soil energy
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Application: Soil energy
Cooling function, soil energy -> (Chiller pump or/and directly 52 -> AHU)
heat pump
Soil/geothermal
VAV device
cooling water 52
ECONET
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ECONETvs. Compact
ECONET standard vs compact
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Standard Controller and frequency inverter
Framework for controller andfrequency inverter
Compact No controller, software in the frequency
inverter
Frequency inverter integrated on pump
Reduced size of pump unit
Basic functions the same
Reduced additional functionality
ECONETstandard vs. compact
ECONET
ECONETstandard vs compact
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CompactReduced additional functionality
Dry box solution
Twin pump solution
Energy calculation
Efficiency calculation
Lon
BacNet
Cleanable coils
Items listed above available forECONET standard:
Optional: Modbus
ECONETstandard vs. compact
ECONET
ECONETstandard vs compact
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Summary
A simplified ECONET (RAC) solution
Basic functionality the same (standard vs. compact)
Additional functionality limited
ECONET standard vs. compact
ECONET
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To summarize: the uniqueadvantages of theECONETsystem.
Unique advantages of ECONET
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Unique advantages of ECONET
1 component, 4 functions:
Heat recovery Additional heating
Cooling recovery
Additional cooling
Lower pressure drops
Shorter AHU
Fewer components
ECONET
Unique advantages of ECONET
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Unique advantages of ECONET
Increased heat recovery efficiency6075% performance
Able to use cooling recovery
Always prepared for cooling andcooling recovery
Possibility to utilize process/ waste
heat
Perfect for district cooling/heating
Pre-fabricated pump unit
ECONET
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Thank you.
For more information, please visit us atwww.semcohvac.com
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