Thermal Products Inc Optimizes Heat Exchanger Process and Cost Effectiveness for Each Heat Exchanger Application
Process applications involving heat transfer can take optimal advantage of design nuances to achieve the right balance of suitability for the duty and cost effectiveness. Many times, the fluid properties in terms of corrosiveness, volatility, the presence of solids and fouling properties predetermine the type of exchanger specified within a given process. Other considerations such as accessibility for cleaning, footprint, temperature approach or capital cost dictates the final specification. At some point, the design engineer must strike a balance between the subjective and objective, between the optimal in process and the cost of construction and ease of maintenance.
Look first at the process, then at the heat exchanger
Suitability for the application must first be determined by asking the right questions. While not a simple process, as such an analysis is often laden with potential trade-offs, this exercise will effectively eliminate some designs that fail to meet the base demands of the application that cannot be compromised. Only after the operational and process considerations are clearly understood can one begin to narrow in on an appropriate heat exchanger specification. A full-service heat exchanger manufacturer should be expected to provide both thermal and mechanical design, assuring that the finished product takes operational requirements into account. Some manufactures employ sophisticated thermal modeling software that can accurately predict heat release curves and multi-phase performance. Full service manufacturers offer thermal performance guarantees.
Some of the questions answered during the evaluation are:
• Is this application one that cannot tolerate interstream or cross contamination leakage?
• Are either of the fluids toxic, corrosive or lethal if exposed to the atmosphere?
• Are there operational advantages in achieving low approach temperatures?
• Does the process lend itself to heat recovery? Is there a high value attached to this?
• Is this a batch operation? What is the cost benefit from rapid batch cycling?
• Do either of the fluids contain solids and what size?
• What is the maximum temperature or pressure that either stream could reach in operation?
• Are there fluctuations in the flows or temperatures that could result in thermal expansion?
• Are either of the fluids high fouling, requiring frequent service of the exchanger?
• Are there space limitations that cannot be avoided without high construction cost?
• Is sufficient plant cooling water available? Is cooling with air an option?
Fluid Property Considerations - Critical Fluids
• Critical fluids such as corrosive, expensive or lethal fluids should be positively contained. TEMA Type BEM, AEM and NEN are welded and have no gaskets or packing inside the shell. The tube side can be cleaned mechanically, but the shell side must be cleaned chemically as the bundle is fixed. Avoid the use of internally or externally packed floating head designs for volatile or toxic shell side fluids.
• In sanitary, lethal or explosive applications, it is common to place the critical fluid inside the tubes, regardless of other considerations. In such cases shell and tube exchangers are typically specified with high-alloy materials and/or 3a polished surface finish. Mechanical and electropolish techniques are acceptable. Exchangers can be manufactured with clad tube sheets in large diameters and solid in smaller diameters.
• To reduce tube to tube sheet joint failures, specify that the tube sheet holes be reamed and polished to prevent any material presence during the tube expanding operation.
• In lethal service, specify strength welding, not seal welding of the tube joint. A proper strength weld is not a surface weld, but adds material where the tube end is set slightly in from the tube sheet surface. It is designed to withstand the full operating pressure without expanding the tube. Light expanding is typically performed only to prevent liquid from entering the crevice formed between the tube OD and tube sheet.
• An outside packed floating head exchanger is designed so that only the shell side fluid is exposed to the packing, allowing critical, toxic or volatile fluids to pass though the tube side.
• In plate heat exchangers, semi-welded designs eliminate 90% of the required gasket area on the critical side and therefore provides a measure of containment of one of the circuits while allowing the other to be opened for periodic maintenance.
• Fully welded plate heat exchangers should be specified for lethal, penetrating or critical fluid applications or where gasket material contact is not acceptable. Fully welded plate exchangers are often specified for ammonia evaporation due to the high performance and containment characteristics.
Fluid Property Considerations - Fluids with Solids
• Shell and tube exchangers can be specified with larger flow passages to accommodate a certain amount of solids or particulate without fouling or clogging.
• Plate exchangers can be specified with flow passages having wide annular spaces and minimal contact points instead of the common herringbone or chevron pattern. This design allows passing of slurries or fluid with solids and fibers, typically at the expense of operating pressure.
• When cooling high volumes of gas, enhanced high-fin tubing or plate fin bundles increase the heat transfer coefficient in the shell side while maintaining a low pressure loss. Plate-fin bundles provide superior thermal performance due to the increased effective surface and provide longer service life due to the continual tube support throughout the bundle. Divided-flow TEMA “J” shells can also be used to accommodate gas streams in the shell.
• It is typical to place the viscous fluid in the shell circuit of a shell and tube where it is easier to enhance the heat transfer coefficient by manipulating the fluid velocity. Viscous fluids tend to enter laminar flow more readily when placed in the tube side, but is often necessary to achieve very low pressure loss requirements.
Pressure and Temperature
• In applications with thermal expansion or contraction, specify a u-tube or floating tube sheet design.
• It is customary to place high temperature liquids on the shell side to eliminate the presence of gaskets or packing.
• Depending on the fluid viscosity, to achieve low pressure drop for a process fluid, place the flow inside the tube circuit.
• For cooling gas, to achieve low pressure drop, specify a plate fin tube bundle instead of traditional bare or enhanced tube surfaces.
Temperature Approach and Crossing
• It is economically viable to achieve an approach temperature of no less than 10°F in counter-current flow, single pass shell and tube heat exchangers.
• To achieve closer approach performance, or some amount of temperature crossing, a plate exchanger should be specified.
Sanitary Designs for Fine Chemicals, Foods and Pharmaceuticals
• Double tube sheet designs prevent interstream or cross contamination leakage if there is a failure of the inner tube to tube sheet joint. Joint failure results in shell side fluid leaking to atmosphere. A retaining collar can be installed to collect any fluid from the failed joint.
• Double wall shell and tube and plate designs are available for the prevention of interstream contamination. Although there is metal to metal contact, some loss of thermal conductivity should be expected.
• Sanitary designs for plate exchangers include polished plates and sanitary fluid ports. Plate designs allow rapid disassembly to expose both process streams for mechanical cleaning, but it is customary to provide Clean-In-Place systems in such applications.
Cleanability and Service
• Generally, place corrosive or high fouling fluids through the tube circuit with straight tube designs to facilitate mechanical cleaning. Non-fouling fluids can be processed through the tube circuits of u-tube designs.
• Shell and tube exchangers can be manufactured with “A” type heads where the tube side ports are radial and the cover plate is bolted to the channel with heavy-duty hinges. This allows quick access to the tube side without disturbing any connective piping. Because of the “A” heads, tube cleaning can also be accomplished in TEMA type AEW designs without disturbing any connective piping.
• It is easier to detect tube leaks on the tube side of shell and tube exchangers. Rupture disks are typically placed on the shell side to indicate a pressure change that can be indicative of a tube failure.
• For applications where complete drainability for service or process fluid changes is required, place the critical fluid in the tube circuit. Shell side drainability can be enhanced by the use of drain plugs between notched baffles. Drainage is typically enhanced by purging the shell with compressed air. In some cases, the exchanger can be mounted at a 3-5° slope to facilitate tube side draining.
• Tube side drainability of multi-pass heads can be accomplished by installing a drain plug that straddles the vertical pass rib inside the head, allowing access to both hemispheres. Sanitary units demand self-drainability without removing the heads.
• For applications requiring shell side access for mechanical cleaning, avoid exchangers with both tube sheets welded to the shell because only chemical cleaning is possible. Instead specify one of the removable bundle designs with a square tube pitch to allow brushing between tube rows.
• For plate and frame models, glueless, snap-in or clip-on gasketed plates can be cleaned or regasketed without removing the plate from the frame, however for high-fouling duties, where the plate pack must be opened frequently for cleaning, the glued gasket may reduce overall service costs.
• Use the entire available pressure drop to maximize the fluid velocity and thereby the heat transfer rate.
• Specify commercial standard designs where applicable. Apply ASME U or UM Stamp for applications or insurance regulations that require code inspection.
• Specify TEMA Type BEM, AEM and NEN when other considerations are met. This straight tube, all welded design is the least complex and costly and provides the maximum tube count for a given shell diameter. Type NEN exchangers have the shell and the head welded directly to the tube sheet and are the lowest cost.
• There is a hybrid TEMA type design available that features a removable bundle but uses O-rings to seal the floating end. This reduces the unit cost provided the O-ring elastomer is compatible with the shell side process fluid, operating pressure and temperature.
• An externally sealed floating head exchanger is less costly than the full internal floating head design, but both the tube side and shell side fluids must be non-volatile and non-toxic.
• In shell and tube exchangers undergoing thermal expansion and contraction, the lowest cost selection is a U-tube design, but mechanical cleanability of the u-bends is difficult and individual tube replacement is not possible for inner tubes. The next step in terms of cost is the TEMA type AES, which has a full tube count, but requires more labor to pull the tube bundle for service. The highest cost alternative is the TEMA type AET, which sacrifices some tube surface to allow room for the internal floating head, but is easier to service.
• Placing high-pressure gas or liquids on the tube side can reduce cost by eliminating the need for a heavy wall shell to retain the operating pressure.
• Apply fouling factors to thermal calculations judiciously as small factor increases result in large effective surface requirements.
The Bottom Line
Once these operational considerations have been addressed and understood, Thermal Products Inc can better focus on the actual exchanger specification. There are three classes of shell and tube exchangers available. The lowest cost option is to select a commercial standard design. Many are available off-the-shelf or very quickly as the engineering and components are standardized. Many are available to 12” in diameter and in a variety of materials and Code options. A few manufacturers offer modified designs that are standardized to 42” in diameter at lower cost than traditional TEMA equipment. For more demanding requirements, specify one of the TEMA designs. These are typically available through 60” in diameter. Beyond these are fully customized heat exchangers that tightly incorporate sophisticated thermal and mechanical modeling to provide a “solution” approach.
Shell and Tube versus Plate Technology
One of the fundamental choices involves the use of shell and tube versus plate technology. While this is an involved subject, some basic differentiations are readily available.
• Plate exchangers can be gasketed, welded, semi-welded or brazed. Each has its own advantages and limitations.
• Plate materials include stainless steel, Titanium, Titanium-Palladium, SMO-254, Incolloy, Nickel, Hastelloy, Monel, Inconel and Tantalum.
• Gasketed plate exchangers allow users to open and clean both fluid surfaces. Semi-welded models allow cleaning of one of the fluids. Welded and brazed exchangers are full contained and can only be chemically cleaned.
• Plate exchangers have flow characteristics that cause high fluid turbulence at lower fluid velocities, breaking up the boundary layer and effecting very high heat transfer rates.
• Gasketed plate exchangers are limited to around 300 psi at 450°F. Gaskets are available for compatibility with virtually any process fluid, but engineered resin gaskets can significantly add to the cost of the exchanger.
• The flow channels between plates can be narrow with many contact points to increase thermal efficiency, or wide with few or no contact points to facilitate the passing of solids of fibers.
• As plate packs can be expanded, a designer can anticipate future process requirements and incorporate an upgrade path as conditions change. Because fluid velocity decreases as plates are added in parallel, some loss in the overall heat transfer rate can be expected to occur, so future expansion needs should account for this factor.
For applications cooling compressed gas, or for operating at high pressure or temperature, or where reduced maintenance costs associated with gaskets is desired, for many industrial duties, shell and tube technology is still the best direction.
With heat removal requirements, and the emphasis on close control and recovery of heat energy in chemical processing installations, it is prudent for a plant designer to establish ongoing relationships with experts in the discipline. Ideally, one should have the ability to objectively evaluate the differences between given shell and tube options and even between shell and tube and plate alternatives. Seeking a manufacturer that offers all of the options available enhances this objectivity that can equate to the best solution being applied to the requirement.
With API Heat Transfer
I know we are all enjoying our summer weather, but now is the time review your heat exchanger, tube bundle and steam and water coil needs.
Thermal Products Inc can offer direct replacement and new application tube bundles for many manufacturers below. All we need is the manufacturer and complete model number, thus providing our customers with tube bundles that are of the same (or greater) quality than the original, while simultaneously matching the dimensions and performance of your existing unit.
Thermal Products standard tube bundles ship 2-3 weeks after receipt of purchase order and data approval.
Thermal Products Can Cross Reference Your Tube Bundle From The Following Manufacturers
Bell & Gosset
Thermal Products can manufacture your “drop-in” complete heat exchanger, tube bunlde or coil from the following materials
304, 316 , 317 and 321stainless steel and more..
RUSH/EMERGENCY SHIPMENTS are available when delivery is critical.
Tube Bundle Capabilities Include, But Are Not Limited To:
4" nominal to 60" nominal
U-Tube, or Straight Tube (Fixed Tubesheet or Floating Tubesheet)
Enhanced Tube, Low-Fin, Lo-Fin, Intergral Tube Bundles (U-Tube or Straight Tube)
Tank Heater Tube Bundles
Fuel Oil Heater Tube Bundles
Double Wall Vented Tube Bundles
Standard & Specialty Alloys
Heads & Bonnets
Tank Collars & Nozzles
A.S.M.E. Stamping Available
Not Sure How to Measure a Tube Bundle?
Check out our online/printable tube bundle dimension sheets!
Thermal Products engineering and sales staff will assist you with designing and sizing your tube bundle. We can fabricate to your specifications, cross-referencing your current make & model or take on-site measurements.
If you are unsure if you need a new unit or a repair, ship your existing tube bundle to the Thermal Products facility for a diagnosis. We will advise you on your options and offer a quote prior to doing any work. No order is necessary and most tube bundles are diagnosed free of charge.
Contact us today to see if we can diagnose your tube bundle free of charge.
24 Hour Next Day Shipment
Your order will ship the next business day, if placed before 11:00 pm EST.
48 Hour Shipment
Your order will ship within 2 business days from the time of order.
5 Day Shipment
Your order will ship within 5 business days from the time of order.
10 Day Shipment
Your order will ship within 10 business days from the time of order.
Tube Bundles: Within 2 to 3 weeks.
Heat Exchangers: Within 5 to 6 weeks.
Custom Heat Exchangers: Depends on size and complexity, call for estimate.
Retube/Repair Tube Bundles: Within 2 weeks.
Standard and Rush Shipment lead times may vary, call for availability.
Thermal Products Inc is excited to annouce the new launch of the Serenity line of Puck silencers.
The Serenity has a number of improvements and advantages over the Harmony Silencer product.
Improved Sound Performance over Harmony Silencer
Sound Performance meets or exceeds marketed values
Enhanced Durability with Aluminized Steel vs. Carbon Steel – Improved Corrosion Resistance & thermal resistance
Consolidation of Hockey Puck style and Harmony into 1 product line utilizing the best design practices from both series.
Expanded standard size range up to 24” pipe size.
Reduces complexity to customer
Contact Thermal Products Inc to discuss your application today!
UHIR Series Unit Heater
The UHIR unit heater is available in 50 standard models with ratings up to 50 KW at voltages of 208, 240, 277, and 480 single or three-phase. They are available with a wide variety of factory built-in or field-installed options.
Temperature Control: Single-stage or two-stage control with built-in or remote-mounted thermostats are available on all heaters.
Control Options: Available as factory built-in or field-installed to meet job specifications.
Custom KW's: Custom KW's are available up to 50 KW.
Discharge Direction: The UHIR heater can be mounted for horizontal or vertical discharge using an optional universal wall/ceiling mounting bracket or with field-furnished threaded rods for ceiling mounting.
Color Options: The standard color is camel. Six optional colors are available: grey, yellow, red, white, blue or textured beige. Heaters may also be supplied with unpainted corrosion resistant galvanized steel.
Standard Construction Features
Industrial grade, 0.475" diameter steel sheath with brazed copper plated steel fins and epoxy sealed ends. Draw-thru airflow design pulls air across the heating elements to ensure cool element operation and even air distribution resulting in long element life.
Heating elements and motor are enclosed in a heavy gauge galvanized steel cabinet with a durable camel polyester powder coat finish.
Individually adjustable louvers are provided to direct airflow. A protective outlet fan guard is provided to prevent insertion of foreign objects.
Permanently lubricated and thermally protected motor.
All units include an automatic reset thermal cutout that will de-energize the heater if an overtemperature condition occurs. A manual reset thermal cutout, in addition to an automatic reset thermal cutout, is standard on heaters 10 KW and above. A fan relay is provided to allow the elements to heat up before fan startup and purges the heater of residual heat after shutdown. A 24-volt transformer and disconnecting contactor are provided on most heaters. Single-phase heaters rated at 5 KW or less have line voltage controls; 24-volt control and contactor are available. Power fusing is standard on all heaters rated over 48 amps.
Universal horizontal or vertical discharge. Optional diffusers are available for vertical discharge. An Anemostat diffuser can be used to provide draft-free air movement at lower mounting heights. For higher mounting heights, radial diffuser with adjustable fins can be used to increase floor coverage or adjusted for a vertical down blast of air.
Factory Built-in Options
• Custom KW – Contact Thermal Products Inc
• Power disconnect switch
• Fusing under 48 Amps, not available on heaters 3 to 10 KW
• Manual Reset Cutout (In addition to automatic cutout) on heaters up to 10KW
• “Heater On” Pilot Light
• Built-in 24V transformer and contactor for 3 to 5 KW, single phase heaters.
• 120V Transformer to replace 24V Transformer
• Summer Fan Switch
• Summer Fan Switch: Remote Pilot Duty
• Built-in Thermostat: 1- or 2-Stage
• Anemostat (Cone) Diffuser
• Radial Diffuser
• 2-Stage Control
• Field-Installed Options
• Shipped loose for field installation into heater.
• Anemostat (Cone) Diffuser
• Radial Diffuser
• Horizontal Dust Shield
• Disconnect Switch
• Built-in Thermostat: 1- or 2-Stage
• “Heater On” Pilot Light
• Summer Fan Switch: Built-in or Remote
Contact Thermal Products Inc Today To Discuss Your Application!
Ultra-Safe™ EXP Explosion-proof Unit Heater
Thermal Products is happy to spotlight the Indeeco Ultra-Safe™ EXP explosion-proof unit heater is designed with both safety and versatility in mind. Unique ULTRA-SAFE™ EXP features include:
Industry’s Lowest Ignition Temperature Code Rating: T3C, 320°F (160°C)
Dual Overtemperature Protection: With both automatic and manual reset overtemperature cutouts for additional safety.
Nontoxic Propylene Glycol Heat Transfer Fluid
Low 70 PSIG Relief Valve Setting: This assures that in an emergency, the initial escaping vapor temperature remains below the 320°F (160°C) ignition temperature.
Corrosion Resistant Options: INDEECO offers three constructions suitable for most applications.
Standard construction for use in dry non-corrosive areas includes: welded steel heat exchanger; powder-coated cabinet.
A 316 stainless steel construction suitable for Waste Water Treatment Plants includes: 316 stainless steel heat exchanger, headers and tubes with aluminum fins; stainless steel cabinet; corrosion resistant hardware.
Third construction is suitable for use in Chemical Plants where chlorides are present and includes: Heresite® coated heat exchanger, cabinet, fan blade; corrosion resistant hardware.
Standard Construction Features
Efficient liquid-to-air design utilizes an all welded steel headers and finned tube construction with spiral wound aluminum fins. Industrial grade INDEECO heating elements are immersed in a nontoxic, inhibited, propylene glycol heat transfer fluid that provides freeze protection down to -49°F (-45°C). The heat exchanger is hydrostatically tested at 350 psig. A pressure relief valve provides excess pressure protection and is set at 70 psig.
Fan Motor Assembly
Consists of an explosion-proof motor fitted with an aluminum fan blade. The motor has double- shielded, permanently lubricated ball bearings and automatic reset line breaking thermal overload protection. Motors furnished on standard units operate at line voltage and are prewired to the control enclosure so separate field wiring to the motor is not required. The standard motor is rated for Class I, Groups C and D, Class II, Groups F and G. The minimum operating temperature is -14°F (-25°C) and the minimum storage temperature is -49°F (-45°C). Download the product data sheet for optional motor ratings.
Industrial grade, corrosion resistant construction fabricated from beige powder coated 14-gauge galvanized steel. The adjustable louvers have minimum opening safety stops.
Factory mounted on the unit heater. Standard built-in controls include automatic and manual reset overtemperature cutouts, controlling magnetic contactor, and 24-volt control circuit transformer housed in a NEMA 7, 9 cast aluminum enclosure.
Factory Built-in Options
316 Stainless Steel Corrosion-Resistant Construction (Waste Water Treatment Plants)
316 Stainless steel heat exchanger with aluminum fins, 316 stainless steel cabinet; aluminum fan blade; cast aluminum NEMA 4, 7, 9 control enclosure; corrosion-resistant hardware; corrosion-resistant protective coated motor, which has passed the ASTM B117 salt-spray test.
Dirty Duty Corrosion-Resistant Construction (Chemical Plants)
Heresite® coated heat exchanger, cabinet and fan blade; cast aluminum NEMA 4, 7, 9 control enclosure; corrosion-resistant hardware; corrosion-resistant protective coated motor which has passed the ASTM B117 salt-spray test.
Factory installed on the unit heater above the control enclosure. This is an inexpensive and positive way to meet NEC/CEC requirements for a disconnecting means within sight of the heater.
Group E (Metal Dust) Construction
Class II, Group E (Metal Dust) Construction Temperature Code T3C, 320°F (160°C)
"Warning" Pilot Light
Indicates when the thermal cutouts have tripped and the unit heater needs servicing.
"Heater On" Pilot Light
Indicates when the electric heating elements are energized.
Manual Reset Thermal Cutout with Backup Contactor
A pilot duty manual reset thermal cutout with a backup contactor is provided for independent secondary overtemperature protection. This option cannot be provided if option Code S or V are also specified.
Auto/Fan Selector Switch
A two-position switch wired to the control circuit for auto (automatic heat) and fan only control. This selector switch cannot be provided if option Code M or V are also specified.
Factory installed and prewired to the control enclosure. Thermostat is adjustable from 50° to 90°F (10° to 32°C) range.
120 Volt Control Circuit
Can be provided when required for special external thermostat circuit. This option cannot be provided if option Code S or M are also specified. Nor can both K and L be specified.
These are available for ceiling, wall and pole mounting.
A remote wall mounted thermostat is available.
Class I, Divisions 1 and 2, Groups C and D
Class II, Divisions 1 and 2, Groups E, F and G
Class I, Zones 1 and 2, Group IIB
Temperature Code T3C, 320°F (160°C)
CSA - USA & CAN FM - USA & CAN
Aircraft Hangars/Service Areas
Chemical Storage/Handling Areas
Coal Preparation Plants
Oil Refineries and Rigs
Paint Storage Areas
Sewage Pump Stations/ Treatment Plants
GT Exhaust and Silex both have been known as the "go to" manufacturers for Engine Silencers and PD & Centrifugal Blower Silencer. Their ability to design and build a quality product at competitive price levels are second to none.
GT Exhaust and Silex have the ability to offer many different arrangements and styles to fit almost any application. Whether your need fits an application below or not, contact Thermal Products and speak with our sales and engineering team about your next application today!
Select GT Exhaust or Silex from the menu bar above to read more on our abilities.
• Positive Displacement Blowers
• Centrifugal Multistage Blowers
• Pneumatic Conveying Systems
• Vacuum Trucks
• Compression Systems
• Engine Exhaust
• Marine Applications
• Industrial Silencers
• Emission Control Products
• Insulation Blankets
• Wye Connectors
• Vibration Isolation
• Expansion Bellows
• Exhaust Accessories
Thermal Products has arrived at the Craft Brewers Conference in Washington D.C. stop by to see Scott D Robinson and the Advantage Engineering Team at booth #645!
Thermal Products Inc, will be participating at the Craft Brewers Conference (CBC) & Brew Expo America in our nation’s Capital, Washington D.C., together with our partners Advantage Engineering http://thermalproducts.com/products/chillers/advantage-engineering and Enerquip Heat Exchangers http://thermalproducts.com/products/shell-tube-heat-exchangers/enerquip
This annual event allows exhibitors and buyers to develop profitable business relationships and helps brewing and brewery restaurant professionals encounter the latest and best products and services that industry vendors have to offer.
We’ll be there to show ours!
Please visit Scott Robinson of Thermal Products and our partners at the booth locations below.
Advantage Engineering Booth #645
Enerquip Heat Exchangers Booth #2002
Learn how Thermal Products can assist you with your quick tank heating needs to your fully customized tank heating needs for all types of fluids.
In 1998 the Environmental Protection Agency (EPA) ruled that owners of Underground Storage Tanks must conform to standards that were established for secondary containment. Secondary containment tank is a tank assembly consisting of a primary tank and an integral outer secondary containment means capable of being monitored for leakage. EPA required all Underground Storage Tanks to be retrofitted to meet secondary containment requirements, removed or replaced by Above Ground Storage Tanks. Many State Agencies have indicated the use of Above Ground Storage Tanks is the best option. Above-ground Storage Tanks are usually installed outdoors which can lead to problems when the product viscosity is affected by colder temperatures. The solution is to add a heater to warm the product and maintain a free flowing viscosity.
An 8,000 gallon rectangular Above-ground Storage Tank filled with diesel fuel was installed at a major airport in the U.S. With a design outside winter temperature of ‐20ºF and 10 MPH winds a heater is required to maintain the fuel at 40ºF. Since no openings were allowed in the side of the tank the only access for the heater was through the top of the tank. Using the new INDEECO I‐HEAT heater selection program it was quickly determined that a 2 KW immersion heater would be required.
INDEECO selected an over‐the‐side flanged deep tank immersion heater with a remote industrial control panel. The heater used was a 3‐inch 150# carbon steel flange and 0.475 diameter steel elements rated at 6 watts per square inch. The 46‐inch long heating elements were mounted to a 76‐inch riser which positioned the elements in the lower half of the tank. The heater was furnished with both high limit and temperature control thermocouples.
One of INDEECO’s standard NEMA 4X industrial control panels equipped with a main power disconnect switch, controlling contactor, transformer, digital thermostat, Type J thermocouple controller, status pilot light and 150 watt enclosure heater was selected to control the heater.
The customer was looking for a quick solution. INDEECO was able to offer a quick-ship standard industrial panel. The custom heater’s lead‐time was 5‐weeks and the panel was available in 2‐weeks.
Contact Thermal Products to see how we, with INDEECO can assist you with all your tank heating needs
Written by Indeeco
An Advantage Engineering, Evaporative Cooling Tower Stand is used to elevate the outdoor mounted cooling tower to facilitate gravity return of water from the cooling tower to an indoor tank. Saving energy, by eliminating the need for a cooling tower pump and conduit runs and opening up critical ground space for other equipment needs.
Advantage Power Tower cooling tower cells from 45-135 ton capacity use a galvanized steel bolt together stand.
The galvanized steel, bolt together stand provides a rigid mounting and is easy to install. It requires no welding or post assembly painting and is designed to last for many years.
The stand is available in three (3) heights; 5 foot, 10 foot and 15 foot.
Power Tower cooling towers from 170-540 ton capacity use a welded and painted steel stand.
Contact Thermal Products to discuss your application today!