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Wärmepumpe mit Eis/Wasserspeicher für Heizzwecke/Thermal Storage
Im Anhang, Text und Links zu Ihrem Thema! Viel Erfolg Gruss Huber
Das Wasser-Eis-Speicher-System Das Wasser-Eis-Speicher-System (Deutsche Patent Nr. 4405991, + Österreich, + Schweiz) Die Optimierung der Solar- und Umweltenergie-Nutzung mit Wärmepumpe und "Wasser-Eis-Speicher"
Zur Information
das Patent für das Wärmepufferspeichersystem ist erteilt (Nr. DE 195 16 837). Bei Interesse informieren wir Sie sehr gern, wenn Sie uns eine Nachricht senden. hgrasshoff@gmx.de Warum Wärme zwischenspeichern? Solarkollektoren ohne Pufferspeicher sind nur die Hälfte wert ! Nicht jeden Tag scheint die Sonne, aber wenn sie scheint reicht ihre Energie für mehrere Tage zur Wärmeversorgung. Das ist in der Übergangszeit von ganz besonderer Bedeutung.
Die heute üblicherweise verwendeten Pufferspeicher stehen unter Leitungsdruck und sind viel zu klein ausgelegt. Ein von uns entwickelter überdruckloser Pufferspeicher mit etwa 3.500 Litern Inhalt versorgt das Haus in der Übergangszeit bis zu 5 Tage mit Heizwärme und sorgt etwa ebenso lange für warmes Brauchwasser, das stets frisch erzeugt wird. Nur so lohnt sich eine Solaranlage überhaupt erst richtig !
Besonders wichtig ist eine gute Schichtung des Wassers im Pufferspeicher entsprechend seiner Temperatur. Oben soll sich das warme und unten das kalte Wasser befinden. Das warme Wasser wird oben entnommen und muß teilweise abgekühlt wieder zurückgeführt werden. Dabei tritt nach heute üblichen Methoden eine Durchmischung auf. Um dieses auszuschließen wurde ein Patent angemeldet, das mittels trichterförmiger Körper für ein automatisches Einordnen entsprechend der Temperatur sorgt.
Der "NÜRNBERGER TRICHTER" Sicher kennen Sie den scherzhaften Ausdruck: "JEMANDEM WISSEN EINTRICHTERN"! Wir bringen dem Wasser quasi die "INTELLIGENZ" bei, sich entsprechend seiner Temperatur im Speicherbehälter einzuordnen.
AUS DREI GRÜNDEN IST ES WICHTIG UNSEREN WÄRMESCHICHTSPEICHER EINZUSETZEN:
Er ist kostengünsiger als alle am Mark vorhandenen, die dem normalem Leitungsdruck ausgesetzt sind. In unserem drucklosen Speicherbehälter befindet sich Leitungsdruck nur in den Rohrleitungen der Wärmetauscher, nicht im eigentlichen Speichersystemedium. Warmes Wasser ist sofort verfügbar. Es steht unmittelbar nach Beginn der Erwärmung durch Solaranlage oder Wärmepumpe zur Verfügung. Mit durchmischtem Wasser kann man erst nach dem Aufheizen des gesamten Speicherbehälters über warmes Wasser verfügen, also erst viel später! Die Wärmetauscher sind alle leicht zugänglich und können im Servicefall unproblematisch ausgetauscht werden.
http://ourworld.compuserve.com/homepages/hgrasshoff/puffer.htm
Die Anwendung von Kühlwasseranlagen mit Kälte-speicherung in Form von Eis ist überall dort interessant wo kurzfristig große Kühlleistungen verlangt werden wie bei der Klimatisierung und bei Kühlprozessen. Zum Beispiel:
Klimatisierung von Konferenzräumen, Kinos, Theater, etc. Kühlung von Milch in Käsereien, kurzfristige Kühlprozesse, etc. Die ökonomische Art "Kälte" zu speichern ist die Eisspeicherung, weil die latente Energie von Eise 93 Watt per Kg beträgt. Im Vergleich mit Anlagen ohne Kältespeicherung, die nur während des Kühlprozesses in Funktion sind, können folgende Vorteile genannt werden:
Minimierte Betriebskosten durch kleineren Energiebedarf und Nutzung von Niedertarifen der Versorgungsunternehmen. Verwendung von Wasser als Kälteträger, keine aggressiven Stoffe und Zusätze. Maximaler Wirkungsgrad der Wärmeaustauscher bei Wasser nahe 0° C. Höchste Betriebssicherheit, bei Gefrieren des Wassers im Behälter keine Deformation wie z.B. bei geschlossenen Bündelrohrverdampfern in Kaltwassersätzen. Große Betriebssicherheit, da bei Störung oder Ausfall durch die Kältespeicherung ein Weiterbetrieb gewährleistet ist bis zur Behebung.
Technische Daten
Auswahltabelle / Zuordnung - Eiswasserspeicher + Kältesatz (R22) bezogen auf die gewünschte Ladeze
Erhöhung der Kältekeistung durch Zusatzspeicherung
Technische Daten für Kältesätze R22 mit luftgekühltem Verflüssiger
Externe Verflüssiger Sätze
Konstruktive Merkmale INNENBEHÄLTER: verzinktes Stahlblech oder Edelstahl AISI 304 (1.4301). ISOLIERUNG: Diffusionsdicht, Dampfsperre, Polystyrol mit höchster Dichtigkeit. VERKLEIDUNG: verzinktes Stahlblech oder Edelstahlblech AISI 304 (1.4301). ABDECKUNG: isolierte Deckel. BODEN: verzinktes Stahlblech oder Edelstahlblech AISI 304 (1.4301). GRUNDIERT UND LACKIERT: grundierter Profilstahl (Vierkantrohr). ENTLADEN: Rührwerk(e) oder externe Luftturbine. VERDAMPFER: Rohrbatterien aus Stahl verzinkt oder Edelstahl AISI 304 (1.4301). AUSFÜHRUNG: Verdampfer mit Verteiler und Anschluß für Thermoexpansionsventil (Alternativ: mit Mehrfach-Kollektoren für überfluteten oder Pumpenbetrieb). EIS-ANSATZREGLER: für die Steuerung des Kältesatzes.
http://www.fic.com/de/everest_de.html Thermal Storage Retrofit Reduces Costs for Federal Building By Jake Delwiche, Trane Marketing Communications "The project started out as an evaluation of CFC replacement options in two older chillers and evolved into a major mechanical system upgrade." That's the description by Paul Giles, project engineer with the U.S. Federal Government General Services Administration (GSA). The project culminated in the replacement of chillers and installation of thermal storage capability at the William S. Moorhead Federal Building in Pittsburgh.
This 27-story structure is located in downtown Pittsburgh and was constructed in 1963. A wide range of federal government agencies occupies the building. Standard occupancy hours are 8:00 a.m. to 5:00 p.m., with occasional off-hour usage on evenings and weekends. The building has two subbasement levels that include a parking garage and a mechanical area.
The original 30-year old chiller plant consisted of two 990-ton centrifugal chillers equipped with open drives and reduction gears. By modern standards, the chillers were of comparatively low efficiency (about .90 kW/ton) and had a history of CFC-12 leakage. The two original constant-speed chilled water pumps provided 2,866 gpm with 125 feet of head using 125 hp. The two condenser water pumps had capacities of 2,847 gpm with 80 feet of head using 75 hp. One 1980-ton roof-mounted cooling tower served the existing chiller plant.
Replacement Not Practical In 1992, GSA's Mid-Atlantic region commissioned an engineering firm, H.F. Lenz Company, to perform an in-depth survey and analysis of the building's cooling plant. The original focus of the survey was to evaluate the feasibility of converting the existing chillers for use with non-CFC refrigerant and possibly installing variable speed drives to improve their efficiency. The analysis determined that, while variable speed drives could improve efficiency, a much greater improvement could be achieved by complete replacement of the chillers with new, high-efficiency non-CFC machines.
H.F. Lenz Company project engineer Frederick Broberg worked with Giles from the GSA in redirecting the project toward a more comprehensive system solution. At about this time, the electric utility, Duquesne Light Company, encouraged the study of thermal storage as a means of reducing utility electric demand charges.
Chiller Installation
According to H.F. Lenz Company principal Robert Stano, it was at this point that the possibility of combining an ice storage system with new chillers came under consideration. "We could see some real possibilities for reducing operating costs. One of the many challenges was the physical constraints within the existing building." According to GSA's Paul Giles, it wasn't just a question of physical space. "It was a budget issue as well. We needed to demonstrate that the project payback was real."
Ice Storage Option Chosen Ultimately, the consulting engineer, working with the GSA, came up with a detailed plan. It involved replacing the two original 990-ton chillers with two 600-ton high efficiency centrifugal chillers. In addition, the project included an ice storage system. The amount of ice storage that could be used was constrained by physical space in the building. The ice storage tanks were installed in a subbasement space previously used for storage and shops. Despite the reasonably good condition of the original pneumatic control system, it was replaced with a new microelectronic system with advanced control capabilities to achieve optimal energy savings and improved zone comfort.
As a U.S. Government agency, the GSA was required to purchase chillers ranked within the top 25 percent for efficiency. Glycol heat exchanger
One of several bidding options prepared by H.F. Lenz Company was two Trane Model CVHE 600-ton chillers running on HCFC-123. For ice storage, the choice was 39 Calmac tanks rated at 190 ton-hours each for a total of 7,410 ton-hours. Several competitively bid contractor proposals were received and evaluated and GSA selected the above system. The new chillers have a full-load efficiency of .60 kW/ton at ARI conditions. The efficiency of the chillers in the ice-making role is .75 kW/ton. The building automation system installed was a Trane Tracer Summit® system.
The Trane Pittsburgh sales office worked closely with the engineer and the GSA in optimizing the chiller selection and scheduling manufacture and shipment of the major system components. Each individual manufacturers' representative actually signed off to certify that each did participate in the coordination and mutual operation of each component in a fully integrated system. This certification was obtained for the chillers, ice storage, cooling towers, pumps, plate and frame heat exchangers and automatic temperature controls.
Additionally, to meet federal government specifications, all construction documents were prepared in metric (or SI) units. This was one of the first GSA Mid-Atlantic Region projects performed using SI.
Sales engineer Joe Tranchini from Pittsburgh Trane noted, "We saw this as an important showcase job. We knew we had a tight delivery schedule and the equipment had to be on the line, reliably, by the beginning of the cooling season."
Physical Constraints In Subbasement Construction of the project began in October 1995. The mechanical contractor, James C. Eastley, Inc., faced several challenges. The first was finding a way to transport the replacement chillers and the ice tanks into the subbasement area where they were to be located. During design, it was determined that the best way was to cut an access portal through a concrete truck ramp in the basement level of the building. The chillers were shipped disassembled in February 1996. The disassembled chillers and ice tanks were lowered from the basement parking area into the subbasement through the hatchway.
Cooling tower installation
Another challenge was the installation of the cooling towers. The new supporting grid and the new towers were airlifted into position by helicopter in January 1996. "It was the coldest day of the year," said Jim Eastley, "about 7 degrees below zero and mighty windy on the rooftop. We lifted in the supporting grid sections first and bolted them together. Then the helicopter brought in the cooling towers. The whole operation took about three hours."
Following the installation of the chiller plant components, extensive piping, pump and control revisions to the existing system were made to accommodate the ice storage addition and cooling system replacement. After installation, GSA conducted a detailed system commissioning procedure. "This took time," said Giles, "but from my perspective, the start-up went very smoothly." System start-up took place the second week of May 1996.
Flexibility a Major Benefit The system offers wide flexibility in its use of the ice storage capability. In typical July-August operation, the ice storage capability is used to minimize electrical demand during the period from noon to 4:00 p.m., the electric utility's summer peak demand time. The chillers make ice from 6:00 p.m. until 6:00 a.m. In this ice-making role, the chillers are derated from 600 to 461 tons. The evaporator fluid is 25 percent ethylene glycol and the system uses a plate-frame heat exchanger to separate the glycol system serving the ice tanks from the building chilled water distribution system.
During the "shoulder" cooling months, the system is operated to produce a reduced amount of ice, generating only enough to meet anticipated cooling needs during the peak billable demand period. According to GSA's Giles, "Actually, on mild days during the cooling season, we don't run the chillers during the peak at all." Except by special arrangement, the building cooling system is not operated on weekends or holidays.
Storage System Operation - Design Day
Low Temperature Water Ideal for Airside Improvements
Demand Reduction vs. Historical
Robert Stano explained one of the system's added benefits for the existing high rise building. "It can deliver low-temperature chilled water. This offers flexibility for the anticipated future replacement of the building's airside systems. The lower chilled water temperatures will simplify installation of new ductwork within the tight physical constraints of the building, if low temperature supply air distribution is used."
Energy Reduction vs. Historical
In addition to the HVAC system improvements, the GSA has completed numerous other efficiency improvements in the Moorhead building, including lighting upgrades, building envelope improvements and power factor improvement with capacitors. The GSA's Giles is pleased with the results both from an efficiency and comfort standpoint, "We had a fixed budget and limited space. This project gave us a good payback within those constraints."
http://www.trane.com/commercial/library/moorhead.asp
Load Shifting With Thermal Energy Storage
Current downsizing and budget cuts are forcing activities to look for ways to cut their electrical costs. One way to do this is to lower electrical consumption at peak times of the day. Conventional air-conditioning contributes a large percentage to this peak load because they typically run during peak hours. Shifting air-conditioning loads to off-peak times when demand costs are lower will cut demand costs significantly. Thermal Energy Storage (TES) has been successful at shifting air-conditioning loads to lower demand cost periods.
In most cases, the commercial electric rates reflect the utility's cost of generating power. Demand costs are usually highest during weekday afternoons which, in most cases, are considered on-peak. Load deferment gives improved utilization of baseload generating equipment, reduces reliance on peaking units, and improves load factors. Figure 1 shows 30 percent of commercial electricity consumed annually during cooling having a 44 percent peak demand contribution during the summer peak.
Electricity Consumption Contribution to Summer Electrical Peak Demand
Figure 1. Commercial-Sector Electricity Use
TES is a proven and workable technology. There are over 1,000 TES systems currently operating in the United States. TES is a peak-shifting technique which uses conventional HVAC equipment with a thermal energy storage tank to shave peak loads. TES is based on generating cooling capacity at night, during lower demand times. Customers paying higher rates for high peak demand usage benefit most from TES.
TES relies on an inexpensive storage medium using high specific or latent heat to store cooling. Storage mediums may consist of chilled water, ice, or eutectic salt. Production of the medium takes place at off-peak times for utilization during peak hours. The most common types of storage units use chilled water or ice. Due to the difference in energy density of storage, the ice storage units are smaller by comparison to the cool water storage units. Chilled water stores about 20 Btu per pound, compared to ice which stores about 144 Btu per pound. Conventional chillers, or industrial type ice-making units, complete the refrigeration of the medium. These units recharge the storage tanks during off-peak times. Circulating chilled fluid from the storage unit, through a secondary heat exchanger or through the building's fan coils, supplies on-peak cooling.
There are three basic storage-sizing strategies:
Full Storage (FS) Load-Leveling Partial Storage (LLPS) Demand-Limited Partial Storage (DLPS) The decision of which strategy to use is generally an economic rather than a technical decision.
Full Storage (FS)
The FS strategy supplies the entire building's on-peak cooling needs by using a storage unit. This method shifts all of the electrical demand caused by cooling to off-peak hours. Calculating the design-day cooling requirement (tons per hour) during peak times and dividing that by the tank's efficiency factor will determine what size storage tank is needed. Initial costs are usually high.
Load-Leveling Partial Storage (LLPS)
The LLPS strategy supplies only part of a building's cooling load during peak hours. This method will level the building's electrical demand caused by cooling over the design day. Compared to the other two strategies, this method minimizes the size of storage and refrigeration equipment needed to cool the building. Smaller equipment size lowers the initial cost but does not create as large an operating savings as larger equipment
Demand-Limited Partial Storage (DLPS)
DLPS requires less storage capacity than full storage but more storage than load-leveling. It lowers the building's peak electrical demand to a predetermined level. The predetermined level is normally equal to the level of peak demand imposed by non-cooling loads. To effectively keep the total electric demand under the predetermined level, this method requires real-time controllers to monitor the building's non-cooling loads and control the ratio of storage and chiller-supplied cooling.
Storage tank costs range according to local conditions, but are generally between $.50 to $1 per gallon for intermediate-sized tanks, up to 0.5 million gallons. Larger tanks usually cost less than $.50 per gallon. Additional expenses include purchasing auxiliary circulation pumps, piping, valves, and required controls. This can range from 10 to 20 percent of the storage tank's cost. Retrofits and small installations will have higher incremental costs per kW shifted than a new system.
Reduced operating costs are the primary benefit you will realize when you use TES. Energy cost reduction for cooling a facility can be as high as 70 percent. Predicting cost savings from using a TES system requires the following building-specific information:
An hour-by-hour power usage The performance of the proposed cool storage system The local utility's rate structure Typical payback periods using TES usually are from two to six years
Utilities may offer incentive programs, reduced utility rates, and free feasibility studies. Incentive payments are up-front cash incentives or rebates to the customer for installing a functional thermal energy storage unit. Incentives, when offered, range from $115 to $550 per kW of peak demand reduced. Retrofits usually earn a higher incentive than new construction. Feasibility studies, one type of up-front inducement, may be offered free or co-sponsored by the utility company.
A number of Navy activities are already doing load-shifting projects, but many more need to get involved to bring the Navy's electrical costs down.
For further information please contact Jim Heller at DSN 551-3486 or commercial (805) 982-3486, or email jheller@nfesc.navy.mil.
http://energy.nfesc.navy.mil/enews/95b/thermal.htm
DESCRIPTION OF THERMAL ENERGY STORAGE
Description Technical Data Specifications
DYNAMIC ICE HARVESTING FOR AIR CONDITIONING FOR PROCESS COOLING TURBO: A leadership company in a corporate family of Industry Leaders.
TURBO Refrigerating Company was founded in 1952 to provide specialized ice making and industrial refrigeration systems. TURBO pioneered itself as the leading world supplier of this technology, having built over 70% of the industrial ice harvesting capacity for consumer packaged ice. Today TURBO is the world leader in ice harvesting Thermal Storage Systems and industrial chillers, each a recognized leader in its specialized field.
Unlike other thermal storage systems, the TURBO ice harvesting design uses an ice-making surface that is completely separate from the ice storage tank. The ice-making surface consists of stainless steel plates that are welded together to form computer-designed internal channels for controlled flow of refrigerant. Water is distributed uniformly over the outside of the plates. Theplates are grouped vertically in modules directly above the ice storage tank. Ice forms on both sides in sheets 1/4" inch thick. Then, at predetermined intervals, hot refrigerant enters the plates, causing the ice to break away and drop into the tank. The ice breaks into small pieces in the tank.
The cycle is repeated as long as there is need for additional cooling reserves. TURBO ice gives a tremendous amount of heat transfer area, allowing very rapid melting with no risk of short circuiting of the return chilled water.
This continuous ice making capability is impossible with systems where heat transfer coils are submerged in ice storage tanks-because the ice making surfaces become encased in ice, insulating the heat transfer surface and reducing the efficiency of the system, while waiting for a thaw before production can resume.
http://www.turboice.com/
Thermal Energy Storage (TES) is a useful tool to reduce energy requirements by means of spreading the load and taking advantage of lower ambient and off-peak utility rates. Hence TES reduces the overall environmental and economical impacts for given cooling or heating applications.
The disadvantages of conventional ice storage (i.e. the necessity for low temperature chillers to build the ice), and water TES (very large volumes of water are required to satisfy the cooling load) can be overcome by utilising the latent heat capacity of various Eutectic Salts (also known as Phase Change Materials).
Why PlusICE Phase Change Materials?
PlusICE mixtures of non-toxic eutectic salts have freezing and melting points higher than those of water and the temperature range offered by this concept provides:
Space efficient Coolness and Heat Recovery TES Utilisation of existing chiller and refrigeration technologies including Absorption Chillers for new and retrofit TES applications. Elimination of low temperature glycol chillers. Improved system efficiency due to higher evaporation temperatures and possible charging by means of free cooling, i.e. without running the chillers.
http://www.epsltd.co.uk/plusice_main.htm
DHC system incorporates latent heat storage facility
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Summary The central heating plant of a district heating and cooling system serving Minato Mirai 21, a large-scale urban development project in the heart of Yokohama, incorporates the world's largest latent heat storage facility to store energy for cooling. The thermal storage system used is known as STL (Storage of Latent heat) thermal storage. Using plastic, water-filled globular capsules as the storage medium, the storage capacity of the system is 106 MWh. The STL thermal storage system is characterised by compact thermal storage tanks with a high storage density (ice packing factor of 55%) and effectively shaves peak loads by 17.6 MW.
Available in PDF-format.
http://www.caddet-ee.org/techbroc/r246.htm EZDOE PROGRAM OVERVIEW The Elite Software EZDOE program is an easy to use IBM PC version of the U.S. Department of Energy (DOE) program known as DOE-2.1. EZDOE calculates the hourly energy use of a building and its life cycle cost of operation given information on the building's location, construction, operation, and heating and air conditioning system. Using hourly weather data and algorithms developed by Lawrence Berkely Laboratory, EZDOE is a dynamic program that takes into account complex thermal storage effects of various building materials. In addition, EZDOE can also accurately simulate the operation of all types of heating and cooling plants including ice water thermal storage and cogeneration systems. Up to 22 different air handling systems each with multiple control options are supported. The types of heating and cooling plants allowed is nearly infinite as thousands of combinations of chillers, boilers, furnaces, pumps, and cooling towers are allowed. There is even provision for user defined plants and performance curves. The economic analysis capabilities of EZDOE allow for complex utility rate structures, fuel costs, initial equipment costs, replacement costs, and annual costs for non-plant items and baseline data for comparative runs. A large library of over 230 hourly weather data files is available for EZDOE. One weather data file of your choice is supplied with EZDOE while others are available at additional cost. Although EZDOE provides all the advanced features of the full mainframe DOE-2.1d version, it is still very easy to use. Windows, menus, electronic mouse support, full screen editing, and dynamic error checking all combine to make EZDOE a state of the art user friendly program.
DEMONSTRATION DISKS If you would like to evaluate the EZDOE program in further detail you can download a demonstration copy from our website, or order a copy, with complete documentation. The demonstration copies retain all the functionality of the full programs, they are just limited on the size of the project data that can be entered. Please follow this link for a description of the demonstration limits for the EZDOE program.
CALCULATION METHOD The calculation procedures used in EZDOE were developed by the Lawrence Berkley Laboratory (LBL) in Berkely, California primarily for use by the U.S. Department of Energy (DOE). Elite Software continually updates EZDOE to stay abreast of the latest LBL calculation enhancements to the DOE program. The current version of EZDOE uses the calculation procedures of version 2.1d of the DOE program. PROGRAM FEATURES Computes HVAC Operating Costs & Energy Usage Performs 8,760 Hour by Hour Computations Provides Complete Life Cycle Economic Analysis Models All Types of Heating and Cooling Systems Handles Complex Building Designs and Schedules Uses Readily Available TMY Weather Data Files Handles Complex Utility Cost Rate Structures Supplied with Daylighting Analysis Option Prints Numerous Pie Charts and Graphs Menu Driven with On-line Help Screens Can Use CHVAC Project Data Files Provides Comprehensive and Concise Reports Electronic Mouse Support PROGRAM INPUT EZDOE uses full screen editing features that provide a simple "fill in the blank" data entry procedure. All input data is checked at the time of entry so that no improper data can be entered. If you have a question about what the program is requesting, you can press the "?" or F10 key to obtain additional help explanations. All data is saved to disk as it is entered. Four major types of data are requested: Loads, Systems, Plants, and Economics. Load data contains the building and space dimensions, wall and glass orientations, construction materials, people, lighting, equipment, and much more. The Systems data involves all information concerning air handling and heat delivery systems. VAV, constant volume, PTAC, dual duct, two/four pipe fan coils, and radiators are just a small sampling of the many system types supported by EZDOE. The Plant data concerns the cooling and heating equipment such as chillers, boilers, cooling towers and pumps. The Economic section considers initial, annual, cyclical, replacement, and operating costs.
PROGRAM OUTPUT EZDOE offers all of the standard reports as does the mainframe computer version of DOE. These reports can be viewed on the screen, stored in a disk file, or printed. Shown below are just two of the scores of reports available.
SYSTEM REQUIREMENTS EZDOE requires an 84386 or higher IBM PC compatible ÿcomputer with at least 4 megabytes of memory, 20 megabytes of free hard disk space, and DOS 5.0 or higher.
http://www.elitesoft.com/web/hvacr/elite_ezdoe_info.html
Download Ice Thermal Storage CAD Drawings BAC CAD drawings are available by model number. To view a snapshot of the drawing from within your browser, you'll need the WHIP plug-in. Please click the WHIP button to download the FREE plug-in now. To download the full .dwg file, click on the drawing type under CAD Drawings and select, "save file to disk". You can then open the file with your CAD software.
Do not use these drawings for construction. The information contained in these drawings is subject to change and should be reconfirmed at time of purchase.
Three basic types of CAD drawings are available for each model:
2-D CAD element drawings which contain a single view of a unit for ready insertion into CAD design and construction drawings, Unit Print drawings which contain a unit's dimension, connection, and weight information, and Steel Support drawings which contain a unit's steel support design requirements
http://www.baltaircoil.com/drawndex.htm
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12 Dec 2004
22:49:49 |
K.Huber |
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