Ashrae duct fitting database i know this has been raised before but the thread is now closed ive set up a duct system and used revit mep to calculate the pressure drop through the system. Lowvelocity ductwork design is very important for energy efficiency in air distribution systems. Duct muffler 3 end cap 5 end register boots 6 end stack boots 4 flange adapter 5. We do not yet have a description of ashrae duct fitting database itself, but we do know which types of files our users open with it. Id like to have all the fittings report an area so i can schedule total sheetmetal areas. Example of duct fitting loss v u upstream velocity of fitting h height of the duct w width of the duct r radius of the bend.
Ashrae duct fitting database pdf ashrae duct fitting database pdf are you looking for ebook ashrae duct fitting database pdf. Duct fittings 201 items returned list catalog refine results 201 items returned. This tutorial will teach you basics of database management systems dbms and will also take you through. Duct system design guide first edition 2003 mcgill airflow corporation mcgill airflow corporation one mission park groveport, ohio 43125 duct system design i notice. Ashraes duct fitting database dfdb desktop application has become more flexible as a smart phone app, allowing for engineers to make calculations in the field and get results they need quickly. Highvelocity hv duct systems are characterized by air velocities in the range of 2500 to 3500 fpm. I started the series with a look at the basic physics of air moving through ducts. The application was developed for the iphone, ipod touch and ipad, and allows users to perform pressure loss calculations for more than 200 hvac. Effective length the length of duct used for design purposes that includes the straight length of duct added to all the fitting equivalent lengths. Database management system or dbms in short refers to the technology of storing.
Duct fitting database freeware cheatbookdatabase 2005 v. Featuring pictorial outlines of each fitting, this database is useful to design engineers dealing with a variety of duct fittings. Equivalent length the amount of duct length added to a duct run by fittings. With all of the updates that have been incorporated into the desktop version over the past 8 years, it includes more than 30 new fittings, plus updated fitting calcs, reports, and many other new features. A given fitting may be accessed to obtain loss coefficient data and associated pressure loss when appropriate flow rate and fitting information are entered. Fundamentals distribution systems 2 space availability the sizing criteria will often be defined by the space available to run the ductwork figure 1. Shareware hvac ashrae duct fitting database at download.
Every day, users submit information to about which programs they use to open specific types of files. This tutorial will especially help computer science graduates in understanding the basictoadvanced concepts related to database management systems. No part of this work may be reproduced or used in any form or by any means graphic, electronic, or. The database interface features fully available input, output, calculations, and table data properties. Metal flex duct performs better than plastic flex duct. Each duct fitting in the database is identified by a unique number. Ceiling plenums, duct chases, and obstructions such as walls and beams often dictate that a certain size duct be used, regardless of whether or not it is the best size from a. Hvac ashrae dfdb help the hvac ashrae duct fitting database dfdb universal app for the iphone and ipad was developed for ashrae by carmel software corporation. American society of heating, refrigerating and airconditioning engineers, incorporated, 1997 air conditioning 306 pages.
We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files. You will be glad to know that right now ashrae duct fitting database pdf is available on our online library. Fitting lengths should be included in the estimation of l. For any given fitting, the user may enter the flow rate and fitting information and obtain loss coefficient data and associated pressure loss.
This menudriven database includes loss coefficient tables for 228 round and rectangular duct fittings. Some of the duct fittings have surface areas calculated, some dont. Consequently, the total pressure or total energy of air flowing in a duct system is generally equal to the sum of the static pressure and. For any given fitting, enter the flow rate and fitting information and. I live in south africa, and do not have enough time to wait for the shipping and postal service. This type of fitting is kind of difficult to figure out without stepbystep tutorial. About file types supported by ashrae duct fitting database aims to be the goto resource for file type and related software information. Note if there is more than one ashrae number to choose from, consult the ashrae duct fitting database to make sure you choose the most appropriate fitting for your system. The inputs can be adjusted by touch, and installation is automatic. This means that it works on both the iphone and ipad and adjusts its screen accordingly. Ordinary heating, ventilating, and air conditioning duct systems read air pressures at 0. Ashrae duct fitting database download hhjlep mechanical op 2 sep 09 04.
I am unable to view the loss coefficients pdf from the help menu. Duct design 3 total effective length energy vanguard. If there is no assigned ashrae table, you get a 0pa pressure loss. Rdbms is the basis for sql, and for all modern database systems like ms sql server, ibm db2. The biggest update to the ashrae duct fitting database app in years is now available. The hvac ashrae duct fitting database dfdb for the iphone and ipad is now a universal app. Atlanta the american society of heating, refrigerating and airconditioning engineers ashrae duct fitting database dfdb desktop application has been made into a smart phone app, allowing engineers to make complicated calculations in the field and receive faster results. For the complete fitting database see the ashrae duct fitting database ashrae 2009.
Pdf version quick guide resources job search discussion. This app is also compatible with the latest versions of iphone and ipad and ios. Microsoft access is a database management system dbms from microsoft that combines the relational microsoft jet database engine with a graphical user. Database management system tutorial tutorialspoint. Featuring pictorial outlines of each fitting, this cd is useful to design engineers dealing with a variety of duct fittings. Often the equivalent length of a fitting can be equal to or longer than the straight duct lengths due to the additional. Rdbms stands for relational database management system. Ashrae duct fitting database download hvacr engineering. Fan system effect coefficients are only an approximation. Dfdb maintenance is by ashrae technical committee tc 5. A practical approach to design, implementation, connolly, t. Is there anywhere on the internet where i can purchase download view this document in. Duct fitting database 94601 by ashrae, february 15, 2000, amer society of heating refrig edition, mass market paperback.
Features include dynamic illustrations of each design, and the ability to share reports and spreadsheets through email. With our online resources, you can find ashrae duct fitting database or just. I have also done a check calculation manually and the fittings revit mep is using is different ashrae fittings to those it should be using. The short version is that friction and turbulence in ducts results in pressure drops.
Then in part 2 i covered available static pressure. Smc manufactures coil line ductwork in 456 lengths. Where a fitting involves a change in velocity than fitting should be included in the duct section with the higher velocity. If the ashrae number you want to use is in the list, select it for assigned engineering id. The problem is, the ashrae tables are automatically assigned to the fitting and there is no way to change it. Not sure if this is a wish list item or not, and id rather not reinvent the wheel on this. Articles about disaster relief, resiliency, and related topics are of interest in the. We use this information to help you open your files. Distributed dbms tutorial distributed database management system ddbms is a type of dbms which manages a number of databases hoisted at diversified locations and interconnected through. Sql is a database computer language designed for the retrieval and management of data in a relational database. This has included active participation in technical and standards committees for professional organizations that serve the hvac industry, such as ashrae, astm, amca, and smacna. Smc tdc, slipdrive and raw sheet metal connectors, inc.
Database management system tutorial database management system or dbms in short. Anyone know of any methods for calculating duct fitting areas. Table data included for supply, exhaust, and common supplyreturn duct functions. With metal duct, use widesweep elbows or bends to reduce the resistance to airflow. Today we move another step down the road of duct design. The program is based on engineering data and procedures outlined in the ashrae fundamentals handbook. Include measured length and fitting equivalent length. The fundamentals of duct system design mcgill airflow. This database, with cloudbased access by annual subscription, includes loss coefficient tables for more than 200 round, rectangular, and flat oval duct fittings. Table of contents hvac systems duct design fourth edition vii foreword. Duct fitting database 94601 february 15, 2000 edition.
A fan with a 4 duct connection will perform much better with an adapter and 6 duct. Hvac ashrae duct fitting database for ios free download. Duct fitting database software psychrometric and duct calculator v. Use this mobile app in the field for quick duct pressure loss calculations. A duct fitting database that includes more than 220 round, flat. Purchasers receive a oneyear subscription for cloudbased access to the duct fitting database ver. This database, available on cd, includes loss coefficient tables for more than 200 round, rectangular, and flat oval duct fittings. Duct design fundamentals pressure losses how loss coefficients are determined c, u u c c u a u n a, a e every fitting has associated loss coefficients, which can be determined experimentally by measuring the total pressure loss through the fitting for varying flow conditions. Wye is the fitting to use when you need to branch off your duct run to a smaller size.
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