h2o biotech presentation - cooling tower - eng - 131118
TRANSCRIPT
Cooling Tower
Water Treatment
• About H2O Biotech
• About Cooling Towers• Working principles• IAQ problems caused by cooling towers• The old way: chemical disinfection
www.h2obiotech.com
Agenda
• H2O Biotech solution• The new way : Copper + Silver Ionization System• How it works• Installation , operation and maintenance• Benefits
• Sizing
• Pricing
Biological technologies for water treatments
EAUBIOTECH
ENVIRONNEMENTAL
20 years in biological water treatment
About us: some genealogy
www.h2obiotech.com
18 years in energy engineering consulting
Distribution of ingenious products to help reduce environmental footprint
16 years inUV air treatment
Our product lines
www.h2obiotech.com
Public Pools & Water Parks
Cooling towers
Sanitary Hot Water Systems
Copper -Silver
Ionization
UVDisinfection
+sediment &
filtration
Potabilization
Reverse
Osmosis
UV Ozonation
Spa
Therapeutic Baths
Laundromats
Fountains
Cooling towers are the outside heat sinks that exhaust the heat carried by the air conditioning cooling water circuit used in buildings HVAC systems.
www.h2obiotech.com
What is a cooling tower?
Pump
HVAC Air
conditioning
www.h2obiotech.com
What is a cooling tower?
Step 1:
www.h2obiotech.com
How it works
Step 2:
Magic of evaporation
Liquid water + energy Water vapor (with less energy remaining in the liquid)
Evaporative cooling
www.h2obiotech.com
How it works (in a bio-clean world !)
Dry air
Humid air (evaporated water)+
Water loss (drift)
Dry air
Warm water from AC
Cool water to AC
Demister
Water distributor
Fill
Fan
Water make-up
Typically between 85 and 95 °F.
www.h2obiotech.com
In the real “dirty” world…
Dry air Dry air
WindBuilding “fresh
air” intake louvers
Building “fresh air” intake louvers
Simple definition:
An ubiquitous aquatic organism that causes Pontiac Feverand Legionnaires’ disease (lung infection) if inhaled.
Thrives in temperatures between 77 and 122 °F.
Travels from infected water source through aerosolized water droplets.
www.h2obiotech.com
Legionella pneumophila
In the United States…
• 10,000 to 20,000 people get infected by legionella every year.
• Various studies have shown that some 40 to 60% of tested cooling towers contained Legionella.
• Legionnaires’ disease mortality rate: 10 to 15% of those infected.
Cooling tower drift
www.h2obiotech.com
Biofilms
• Form on surfaces in aquatic systems.
• Often resistant to biocides.
• Monitoring is difficult.
• Release organisms into bulk fluid.
• Cost the US nation billions of dollars yearly in equipment damage, productcontamination, energy losses and medical infections.
Bacteria
www.h2obiotech.com
The old way
Make-up
Warm water
Cool waterBlow-down
CHEMICAL$$$(transport, storage, handling)
www.h2obiotech.com
The H2O Biotech way
Make-up
Warm water
Cool waterBlow-down
Copper - Silver ionization system
Corrosion inhibitor
www.h2obiotech.com
The H2O Biotech alternative
Going from this:
Oxidizersor others
Cu++ + Ag+ Ionization system
To this:
Scale inhibitor
Corrosion inhibitor
pH regulator
Biocide
Algaecide
Corrosion & Scale
inhibitor
www.h2obiotech.com
Copper - Silver Ionization
Input: 110-240VAC 50/60Hz
Output to electrodes: 0 to 42V
Copper
A natural algaecide
Ex: copper cook ware
www.h2obiotech.com
Copper - Silver Ionization
Copper + Silver disinfection is a natural proven method for
elimination of water-borne pathogens and algae.
And others approve the use of Copper & Silver Ionization to control and prevent water infections.
Providing adequate dosage of Cu++ and Ag+ ions in water,
results in 99.9999% ( 6 Log ) kill rate.
Silver
A natural bacteria inhibitor
Ex: silver utensils
www.h2obiotech.com
Installation
Pump
Cu++ + Ag+ chambersstandard installation
HVAC Air
conditioning
www.h2obiotech.com
Copper - Silver Ionization
The ionization chamber contains sets of pairs of electrodes made from a calibrated copper-silver alloy.
A safe and low DC voltage is applied to the electrodes.
Water flows between the electrodes and picks up the Copper and Silver ions that are released everywhere in the water system.
+ -
Power Supply
www.h2obiotech.com
Copper - Silver Ionization
And it doesn’t stop there…
Less Chemicals = Less added minerals
• Reduced blow-down• Less make-up water consumption
• Less scale
• Less corrosion
=
Measure the copper concentration in the water with the tester kit.
www.h2obiotech.com
Operation settings
As required, increase or decrease the ion production rate with the voltage knob. Silver concentration follows proportionally
Step 1: Step 2:
Only 5 minutes, twice a week!!!
99.9999% disinfection requires:0.4 ppm of Cu++ ions to control algaes
Traces of Ag+ ions to control bacterias
www.h2obiotech.com
Maintenance
H2O Biotech Cu++ + Ag+ System uses a unique polarization inverting
technology that minimizes the scale build-up on the electrodes and
equalizes the electrodes’ wear-out. Nevertheless, it is recommended
that the electrodes be mechanically cleaned every two to four weeks.
Step 1:
15 minutes, every two to four weeks!!!
Step 2: Step 3:
Typical life expectation of a set of electrodes: between 8 and 16 months.
Shut power off. Isolate unit using the bypass valves and open the hinge lock.
Brush and rinse each electrode plate with fresh water to remove scale
Reinstall electrodes and restart .
www.h2obiotech.com
Benefits
• Powerful algaecide and bactericide
• Eliminates the Legionella and other bacterias &
viruses
• Both curative and preventive action
• Penetrates the biofilm and acts directly at the
stump
• Effective throughout the entire water system, not
just on passing water
www.h2obiotech.com
Benefits
• Not affected by temperature
• Non-corrosive
• Does not destabilize water pH
• Minimal maintenance
• Compact and easy to install
www.h2obiotech.com
Benefits
• Eliminates all chemicals except corrosion inhibitor
• Reduces the build-up of scale and blow-down rate
• Eliminates the algae surface coating resulting in
better heat transfer and lower energy cost
• Extends the lifespan of the cooling tower and coils
system
• Generally pays for itself within 1 or 2 years
maximum
Which means cost saving!
www.h2obiotech.com
Benefits
• Less water consumption
• Substantially reduces airborne
toxic chemical drift
• Substantially reduces the risks
of incidents inherent to chemical
transport and handling
• Eligible for Green, LEED and
Toxic release inventory points
And a greener environment
www.h2obiotech.com
LEED points
Ionization devices on cooling towers have been shown to providing or contribute to provide LEED points in these categories:
Water efficiency : Cooling tower water management (1 point) (for existing building only)
Develop and implement a water management plan for the cooling tower that addresses chemical treatment, bleed-off,biological control and staff training as it relates to cooling tower maintenance.
Develop a water management strategy addressing treatment and bleed-off to ensure proper concentration levels in thecooling tower. Also, develop a program to avoid biological contamination and the risk of Legionella in the building.
Innovation in design (1 to 2 points)
To provide design teams and projects the opportunity to achieve exceptional performance above the requirements set bythe LEED Green Building Rating System and/or innovative performance in Green Building categories not specificallyaddressed.
Credit can be achieved through any combination of the Innovation in Design and Exemplary Performance paths.Substantially exceed a LEED 2009 for New Construction and Major Renovations performance credit such as energyperformance or water efficiency.
Water Efficiency : Water use reduction (2 to 4 points)
To further increase water efficiency within buildings to reduce the burden on municipal water supply and wastewatersystems. Requirements: employ strategies that in aggregate use less water than the water use baseline calculated for thebuilding.
www.h2obiotech.com
Sizing
Cooling tower tonnage, flow-rate, total water volume, system operating pressure.
Function of…
Capacity
Daily blow-down, daily make-up, days in operation per year, use of other chemicals.
Operation
Location, feed water analysis, environmental conditions.
Others
Questions such as system operating pressure, piping material and diameter, filling material, etc., are also asked to the customer to make sure our product is fully compatible.
Always maintain 0.4 ppm Cu++
www.h2obiotech.com
Sizing
QuestionnaireBiological Technologies
For Water Treatments
www.h2obiotech.com
144, Barr St., St-Laurent, QC, Canada, H4T 1Y4 Tel. : (514) 739-1001 Fax : (514) 382-8488
Evaporative Cooling Tower Information:
Owner Contact Person
Location of the Cooling Tower (Full Address) Telephone Fax
Cooling Tower Manufacturer
Model
Serial Year of Built Year of Commissioning
Fill material (plastic, aluminum, etc.) Basin heater
○ Yes ○ No
De-Scaling Device
○ Yes ○ No
Cooling Tower Tonnage (ton or BTU/hr) Cooling Tower Flow-rate (gal/min)
Inlet Water Temperature (oF) Outlet Water Temperature (oF) Total Water Volume (in the evaporation circuit, gal)
Wet Bulb Temperature (oF)
Number of Cell
System Operating Pressure (psi)
Daily Blow-Down Volume (gal) Blow-Down TDS (ppm) Chemical Products Used (type, annual consumption, by hand or by dosing pump)
Daily Make-Up Volume (gal) Make-Up TDS (ppm)
Concentration cycle
Make-Up Water Temperature (oF)
Days of Operation Per Year Average Loading (%)
Please use the back to make a sketch of the water circulation pipes of the evaporative circuit. Indicate the diameter and material of the pipes.
www.h2obiotech.com
Sizing approximation
Systems for Cooling Tower
Tower Size* Model
300 tons IOCH-1P up to 600 tons IOCH-2P up to 900 tons IOCH-3P up to 1,200 tons IOCH-4P up to 1,800 tons IOCH-6P
up to 3,600 tons IOCH-12P
* For reference only (based on a typical cooling tower in operation for 150 days per year at a load of 80% on average – electrodes will last for a year)
Options and partsPair of electrodes Teflon electrode support Copper tester kit
Control box cooling system (If the ambient room temperature exceeds 104 oF)
1 Cooling Tower ton= 1.25 HVAC ton
www.h2obiotech.com
Pay off
Copper - Silver Ionization benefits
As an example, a 400-ton cooling tower will typically use $8,000 worth of chemical products. The same tower equipped with our Copper - Silver Ionization water treatment system will only use $2,000 worth of consumables while providing water, sewage and energy savings of $6,000*.
400-ton cooling tower ROI = 21 months
* Varies with municipality regulations and climate.
www.h2obiotech.com
Publications
“Copper-Silver Ionization distorts the permeability of the Legionella cell, denatures proteins, and leads to lysis and cell death. A commercial system can be easily installed to perform this ionization. Copper-silver ionization is less expensive than hyperchlorination and provides residual protection throughout the water distribution system.”
Legionella: Human Health Criteria Document, Environmental Protection Agency (EPA)
“Legionella are known to enter cooling tower systems in the make-up water. (...) Stagnant areas or deadlegs may be difficult to clean or penetrate with biocides. (...) Cooling towers have been implicated innumerous outbreaks of Legionnaires' disease, and studies have shown that detectable levels ofLegionella are present in many, if not most, such devices. (...) Metallic ions, namely copper and silver,effectively control microbial populations.”
Minimizing the Risk of Legionellosis Associated with Building Water Systems, ASHRAE
“Copper-silver ionization can eradicate L. pneumofila (most virulent form of Legionella) in a waterdistribution system. The advantages of copper-silver ionization include relatively low cost,straightforward installation, easy maintenance, nontoxic by-products, and the presence of a disinfectingresidual. (…) When the ionization unit was inactivated, water fixtures continued to be free of Legionellaspecies for two additional months.”
Departments of Medicine and Engineering, University of Pittsburgh
Thank you!