Nduct sizing ashrae pdf

Agenda and objectives trane engineers newsletter live series ashrae standards 62. This standard is applicable to singlefamily houses and multifamily structures of no more than three stories. Ashrae and other entities have defined energy audits as processes in which engineering service providers identify and recommend efficiency opportunities to clients. However, vav systems operate much of the time at an offpeak load condition and the impact of varying airflow rates to the sizing of duct systems has not been considered. Ashrae releases new duct sizing calculator 20161220. Ashrae standard 34 is intended to establish a simple means of referring to common refrigerants instead of using the chemical name, formula, or trade name. The project committee chair and vicechair must be member s of ashrae. Pressure sensitive tape shall not be used as the primary sealant.

Oct 29, 2014 determine if an ashrae fan is likely to be needed upon completion. The 2017 edition of ansiashrae standard 55 incorporates seven published addenda to the 20 edition, and provides three compliance methods. As a guideline it is not definitive but encompasses areas where there may be a variety of approaches, none of which must be precisely correct. Ashrae pipe sizing requirements are changing system syzer. With more than 57,000 members from over 2 nations, ashrae is a diverse organization dedicated to advancing the arts and sciences of heating, ventilation, air conditioning and refrigeration to serve humanity and promote a sustainable world. Duct design quick introduction duct sizing tools and methods recommended duct velocities and noise effects duct fitting pressure losses do and donts of duct design. The objectives of an energy audit are to identify and develop measures that. Ashrae guideline 142002 overview whole building approach uses a main meter to measure energy flow ecms may be applied to one or more of the systems served by the meter might involve the use of monthly utility bill data option of two paths prescriptive or performance retrofit isolation approach. Nov 11, 2010 designs that integrate applying ashrae 90. Design cfm 4 cfm 6 cfm 8 cfm 10 cfm 12 60 6x4 60 4x6 90 4x8 120 4x10 150 4x12 90 8x4 110 6x6 160 6x8 215 6x10 270 6x12 120 10x4 160 8x6 230 8x8 310 8x10 400 8x12 150 12x4 215 10x6 310 10x8 430 10x10 550 10x12 180 14x4 270 12x6 400 12x8 550 12x10 680 12x12 210 16x4 320 14x6 490 14x8 670 14x10 800 14x12 240 18x4 375 16x6 580 16x8 800 16x10 950 16x12 270 20x4 430 18x6 670 18x8 930 18x10 1100. Ordinary heating, ventilating, and air conditioning duct systems read air pressures at 0.

Standard 55 specifies conditions for acceptable thermal environments and is intended for use in design, operation, and commissioning of buildings and other occupied spaces. American society of heating, refrigerating and air. Ashrae pipe sizing requirements are changing system. The 2010 edition combines standard 552004 and the ten approved and published addenda to the 2004 edition into one easytouse, consolidated standard. Figure 3 is a sketch of an air conditioning cycle plotted on a psychrometric chart. Luxury retail, data centers, retrofitted corporate space they all had to meet 90. Related commercial resources ashrae handbook fundamentals chapter. Comfort not health intended to minimize adverse health effects not carbon dioxide concentration. The immediate downstream duct size that satisfies equation 40 is determined by iteration. This example is an actual commerciallyavailable relief valve. Table 1 lists the names, affiliations and status of the ashrae members who participated in the guideline2. Through a funding contract with the department of energy, copies of the ip edition of ansi ashrae ies standard 90. The new ashrae standard 202, the commissioning process for buildings and systems, is nearing completion and is about to be published.

Ashrae guideline 142002 overview care should be taken to ensure all modes of system operation are represented equally. Calculating relief valves under new ashrae 15 rules final. Ashrae standard 1522004, a method of test for determining the design and seasonal efficiencies of residential thermal distribution systems. The duct size calculator is a reference tool for approximating duct sizes and equivalent sizes. From lighting upgrades to custom coils on a factory chiller, explore specifics while absorbing the message to increase team integration earlier in the process. Standards ashrae writes standards for the purpose of establishing consensus for. Ashraes guideline 142002 for measurement of energy and. The 2017 edition of ansi ashrae standard 55 incorporates seven published addenda to the 20 edition, and provides three compliance methods. Through a funding contract with the department of energy, copies of the ip edition of ansiashraeies standard 90. Requirements from both standards have been incorporated into many building codes, and the.

Specific information on the contents of each addendum. Duct insulation and sealing requirements in commercial buildings continued ashrae 90. Smacnas hvac air duct leakage test manual 1985 to verify the intent of the. Ashrae members who represented future guideline users, producers of products that would be affected by the guideline i. Ashrae duct fitting database this database, available on cd, includes loss coefficient tables for more than 200 round, rectangular, and flat oval duct fittings. Ashrae american society of heating, refrigerating and. A new duct sizing calculator from ashrae and the air distribution institute adi allows hvac airdistributionsystem designers to size ducts more accurately, especially flex ducts under varying amounts of compression, based on research results the duct size calculator is a quick reference tool for approximating duct size and equivalent sizes of sheetmetal duct and flexible duct. Existing duct sizing methods lawrence berkeley national. The traditional duct sizing methods are equal friction and static regain ashrae, 2001. Ashrae 151994 assume we have a vessel with a relief valve with a. New ductsizing calculator available from ashrae and adi. Ansiashrae standard 552010 is the latest edition of standard 55. This report provides a 1preliminary qualitative analysis of all addenda to ansiashraeies. Failure to do so may result in over representing one operational mode and thus introducing bias into the model e.

Ashrae standards are prepared by a project committee appointed specifically for the purpose of writing the standard. Jan 29, 2020 duct design is a key component of energy efficient hvac system performance. Ashrae standard 1291997 ra 2002, measuring airchange effectiveness, to be published by american society of heating, refrigerating, and air conditioning engineers, inc. Duct design clicking on a companys name will take you to their web site. It is derived from the process in ashrae guideline 02005. We encourage engineers, designers, specifiers, and manufacturers of duct system components to get involved at the society level and contribute to our increase of knowledge and. Available computer programs are simply automated versions of these manual procedures. The standard quantifies how much energy and hvac equipment capacity duct leaks actually waste. Duct sizing, june 1977 2 airah application manual duct design da3, 1987 3 ashrae handbook of fundamentals 2001 4 smacna hvac systems duct design 3rd edition. Duct design is a key component of energy efficient hvac system performance. Assessing the ecological integrity of running waters proceedings of the international conference he, audio 50 aps owners manual, and many other ebooks. It establishes a uniform system for assigning reference numbers, safety classifications, and refrigerant concentration limits to refrigerants. As of january 1, 2012, unitary equipment 110,000 btuh 9.

According to ashrae, the calculator allows hvac air distribution system designers to more accurately size ducts, especially flex ducts under varying amounts of compression, based on research results. The latest edition of an ashrae standard may be purchased from the ashrae web site. Lengthy pipes may result in excessive pressure drop greater than 4. The fundamentals of duct system design mcgill airflow. Ashrae standard 147 reducing the release of halogenated refrigerants from refrigerating and airconditioning equipment and systems rob uhl engineering manager, safeway, inc. Principle of duct design in hvac systems cedengineering. Duct sizing, june 1977 2 airah application manual duct design da3, 1987 3 ashrae handbook of fundamentals 2001 4 smacna hvac systems duct design 3rd edition 1990. Ashrae 151994 specifies that the allowable equivalent length of discharge piping be. Department of energy under contract deac0576rl01830 pacific northwest national laboratory richland, washington 99352. Ashrae standard 147 reducing the release of halogenated refrigerants from refrigerating and airconditioning equipment and systems rob uhl engineering manager, safeway, inc first met june 2006 in quebec city membership 16 voting members including 5 producers. Ashrae duct fitting database free version download for pc. This standard will set the minimum requirements for the commissioning process. While the calculator resembles a wheel similar to those used during the days of slide rules, it incorporates three new fields for equivalent duct sizing, says the developer of the calculator, chris van rite.

In addition, it calculates the energy and capacity implications of where the ducts are lo. The analysis considered each of the addenda to standard 90. Ashrae rp19, an experimental program was initiated to determine the friction factor in circular corrugated galvanized spiral ducts. The standard outlines conditions in which a specified fraction of the occupants will find the envir onment thermally acceptable. Ventilation for acceptable indoor air quality calculate the systemlevel outdoor air intake flow a vav system is a multiplezone recirculating system, so the outdoor air intake flow is determined in accordance with sections 6. This session presented the results of the project, which performed an analysis to calculate the required diameter of corrugated ducts required to convey the same volumetric flow rate of air at the same pressure. You pay for the material which theyve developed using an unimaginable amount of resources. We encourage engineers, designers, specifiers, and manufacturers of duct system components to get involved at the society level and contribute to our increase of knowledge and understanding of duct design. Design and construction professionals now have a resource and guidance for specifying and. This seminar will explain the organization and contents of the standard. The latest edition of an ashrae standard may be purchased from the ashrae website.