CHAPTER IV AIR DISTRIBUTION AND BALANCE
|
|
- Holly Cannon
- 5 years ago
- Views:
Transcription
1 CHAPTER IV AIR DISTRIBUTION AND BALANCE 4.1. INTRODUCTION When projecting an air-conditioning system, the following steps should be followed: 1) Determine the heat gain or loss 2) Establish the air requirements (cfm) to remove or add air. 3) Design a duct system capable of distributing the required cfm. 4) Select a fan to move the quantified cfm against the calculated resistance of the system. This chapter is devoted to steps 3 and AIR DISTRIBUTION SYSTEM Cooling and heating systems use air to carry heat through all the facility. The quantity of heat to move and the temperature difference between room air and conditioned air determines the air that circulates through the ducts and other parts that compose the air distribution system. The air distribution system is composed of air handler, ducts and registers AIR HANDLER In compressive refrigeration cycles, the air handler is composed of the warm air input, that permits the return air to flow through the device; the filter that cleans the air; the evaporator coil that conveys the cool gas, which cools the circulating air; the fan that blows the air again inside the facility; the outdoors air intake (where it exists); and the output to the distribution ducts. Figure 4.1 shows an squematic view of an air handler.
2 Figure 4.1. Air handler
3 4.2.2 REGISTERS Registers are outlets that distribute and control conditioned air. They are composed of a diffuser that spreads out the air and a damper to control the air quantity. A good register selection permits to distribute the conditioned air without causing uncomfortable drafts. When distributing cool air, the registers should be located near to the ceiling, because the more dense cool air will tend to move down. When distributing warm air, the registers should be located near the floor because the warm air tends to move up. Figure 4.2 Shows a register Figure 4.2. Register Different registers have different air distribution patterns. The patterns for wall registers are straight, medium and maximum depending on the way the air will be spread out in the room. Other factors in the wall register selection are the number of cubic feet per minute (cfm) and the horizontal distance the air stream travels from a register before it slows to a velocity comfortable for people (throw). Ceiling registers provide throw distances for one, three and four directions. Floor registers should be selected for throw distances from the floor to the ceiling. The information for the register selection can be found in manufactures' catalogs or any other specialized catalogs DUCTS The ducts serve as a carrier to convey the air used for heating or cooling. Most rectangular ducts are constructed using galvanized steel or fiberglass. Flexible round ducts are frequently used in residential installations. The factors that affect the quantity of air that circulates per unit time (cfm) through the duct and its velocity (fpm) are the duct size and the fan power. The quantity of air that circulates per minute in a duct system is determined be the quantity of heating or cooling required and by the temperature difference between conditioned air and room air. The quantity in cubic feet per minute (cfm) can be calculated using formula (2.14), which is reproduced below: where SH is the amount of sensible heat that must be added or removed to maintain the specified room temperature in BTUh and TD is the temperature difference in degrees Fahrenheit between the conditioned air and
4 the room air. Example 4.1. A room has a summer peak sensible heat gain of BTUh. How much 55 ºF air is required to maintain 75 ºF in the room? cfm = / ( 1.08 x ( 75-55) ) = Having calculated the heat gain in a building, the total quantity of cfm can be calculated multiplying the total tons by 400. This is due to the assumption that air handlers typically circulate about 400 cfm for each ton of capacity. The cfm for each room in the building is calculated in proportion to floor area. 4.3 DUCT CALCULATIONS The simplest way of calculating the duct size is using the duct friction chart. On this chart the cubic feet per minute, the velocity, the duct diameter and the friction loss in the duct are represented. Knowing two of this parameters, it is possible to find out the other two. A simplified version of the chart is shown in figure 4.3. Figure 4.3. Duct Friction Chart, Range 1000 to cfm. The recommended main ducts velocities are shown on Table 4.1.
5 Application Main Ducts Residences 1000 Hotels and motels bedrooms 1400 Theatres and auditoriums 1300 General offices, quiet restaurants 1900 Industrial buildings 2400 Table 4.1. Recommended Duct Velocities, fpm Example 4.2 The sensible heat gain in a residence is calculated as BTUh. The conditioned air has a temperature of 55º F and the residence temperature is 75º F. Calculate the size of the main duct to be connected to the air handler. The necessary cfm through the main duct are: cfm = 36000/1.08(75-55) = 1667 The recommended velocity is 1000 fpm as per Table 4.1. from Figure 4.3, the duct size is approximately 18". Frequently it is not convenient or desirable to use round ducts. In this case it is necessary to convert from round to rectangular ducts. For making the conversion, it is necessary to utilize a chart that gives the rectangular equivalents of round ducts. This chart may be found, for example in [1] or in some specialized manual EQUIVALENT LENGTHS OF ELBOW When calculating the friction loss in a duct system, it result convenient to find the equivalent length of elbows in order to simplify the calculations. Figure 4.4 shows an elbow, where the different participating parameters are presented. Figure 4.4. Standard Radius Elbow
6 Figure 4.4. Standard Radius Elbow The procedure to find out the elbow equivalent length is as follows: a) Find R/W b) Find H/W c) Go to the elbow friction-loss chart shown on Figure 4.5 to find L/W d) Multiply the L/W by the width of the elbow and divide by 12". Figure 4.5. Elbow Friction-Loss Chart. Example 4.3 Given an elbow 36" wide by 24" deep, and 20" radius, find the equivalent length of the elbow.
7 4.5. DUCT SYSTEM AND FAN CALCULATION When sizing the ducts and the fan, the following steps should be followed: 1) Find the cfm in the main duct 2) Find the round duct diameter for each part of the system 3) If necessary, convert the round ducts to rectangular ducts 4) Solve for the elbow equivalent length 5) Calculate the total equivalent length 6) Determine the actual duct friction loss 7) Calculate the actual friction 8) Calculate the fan hp applying the formula hp = (cfm x Fan Pressure) / 4000 Example 4.4 The air conditioning system shown on Figure 4.6 is installed in an small auditorium. For architectural and structural reasons, the ductwork must be held at 18" height throughout. The run outs are 10' each. Pressure loss through the outlet is 0.07" wc. Pressure loss through the return, outside air duct and filter bank is 1.2" wc. The main duct will be rectangular, and the run outs will be round flexible ducts.
8 Figure 4.6 Duct System. Solution: 1) Main Duct cfm = = ) & 3) Round Ducts Diameter The maximum duct velocity is found from Table 4.1 as 1300 fpm. From Figure 4.3 (Duct Friction Chart), is obtained the friction loss as 0.1 inches of water per 100 feet. This will be the System design point for creating the following Table: CFM RUN Length Round Rectangular Duct Equivalent 3000 AB x BC x CD x B B B ) Solve for the loss at elbow Elbow at D --- (H/18) (W/9) Radius Ratio: (R/W) = 1.5 (datum) Aspect Ratio: (H/W) = (18/9) = 2 Length Ratio: (L/H) --- Chart --- (L/H) = 5 Equivalent Length: L eq = (5 x 9 ) / 12 = 3.75 ft 5) Total Equivalent Length If the run outs are in parallel only the run out with the greatest pressure drop or longest equivalent length is entered. CFM RUN SIZE Equivalent Length 3000 AB 18 x 18 60
9 1600 BC 18 x CD 18 x Elbowed 18 x B3 18 x 9 10 Total ft. 6) Actual Friction Loss 7) Total Friction 8) Fan horsepower hp = (3000 x 1.413) / 4000 = REVIEW QUESTIONS 4.1. The air volume moving through a duct is 100 cfm. The duct has a diameter of 6. Find: a. velocity in fmp b. pressure drop 4.2. In the figure below A = 80 ft; B = 100 ft; C = 50 ft; D = 80 ft
10 For architectural and structural reasons, the ductwork must be held to a 15 inch height throughout. The runouts are each 40 ft. The fan outlet is 1500 fpm. Pressure loss through the last outlet is 0.07 in WG. Pressure loss through the return, outside air duct and filter bank is 1 in. WG. a. size the ducts for: A, B, C, D, E, F, G, H b. Find the horsepower of the fan motor A system has a duct run handling 300 cfm of air inside a room. The total effective length is 170 ft. Let s assume that the fan is capable of moving the correct air flow in the supply duct with a friction loss of 0.36 in. WG. Cooling coil loss = Supply register loss = Find the duct diameter.
Worksheet for Small Commercial Air System Design
HEATING, REFRIGERATION AND AIR CONDITIONING INSTITUTE OF CANADA Worksheet for Small Commercial Air System Design Wallet card photocopy Inspection Authority: Signature: Date: / / Submitted For: (Owner)
More informationDuct Design and Installation
Duct Design and Installation John Proctor, P.E. Proctor Engineering Group, Ltd. San Rafael, CA 2004 Proctor Engineering Group, Ltd. 1-888-455-5742 mail@proctoreng.com www.proctoreng.com Duct Design ACCA
More informationCapt. Tim s s Duct Design Mythbusters. The bitterness of poor quality is remembered long after the sweetness of low price is forgotten!
Capt. Tim s s Duct Design Mythbusters The bitterness of poor quality is remembered long after the sweetness of low price is forgotten! WHY CARE ABOUT THE DUCTS? Human Comfort Zone (After All, it s s only
More informationCAT-SIUH-2000(3) SUPERSEDES CAT-SIUH-98(2) SARAVEL INDUSTRIAL UNIT HEATERS
CAT-SIUH-2000(3) SUPERSEDES CAT-SIUH-98(2) SARAVEL INDUSTRIAL UNIT HEATERS TABLE OF CONTENTS Introduction...3 Selection & Application.....4 Selection Examples......5-6 Ratings......7-8 Correction Factors......9-10
More informationFan Selection. and Energy Savings
Fan Selection and Energy Savings Reducing power consumption by minimizing system pressure loss and choosing the right equipment HBy BRIAN MLEZIVA Greenheck Fan Corp. Schofield, Wis. Power Consumption HVAC
More informationDESIGNING MODULAR VAV SYSTEMS
FORM 5.2 REV 0905 THERMA-FUSER THERMALLY POWERED VAV DIFFUSER DESIGNING MODULAR VAV SYSTEMS MODULAR VAV SYSTEMS The Therma-Fuser diffuser is a simple stand alone device that provides VAV control when supplied
More informationAdding More Fan Power Can Be a Good Thing
This article was published in ASHE Journal, May 14. Copyright 14 ASHE. Posted at www.ashrae.org. This article may not be copied and/or distributed electronically or in paper form without permission of
More informationPRESSURE-ENTHALPY CHARTS AND THEIR USE By: Dr. Ralph C. Downing E.I. du Pont de Nemours & Co., Inc. Freon Products Division
INTRODUCTION PRESSURE-ENTHALPY CHARTS AND THEIR USE The refrigerant in a refrigeration system, regardless of type, is present in two different states. It is present as liquid and as vapor (or gas). During
More informationProduct Data. 40RUA/40RUS 6to15TonDirectExpansion 7.5to15TonChilledWater Packaged Air---Handling Units FEATURES/BENEFITS. Indoor air quality features
A/S 6to15TonDirectExpansion 7.5to15TonChilledWater Packaged Air---Handling Units Product Data Carrier s versatile packaged air-handling units satisfy design requirements with: ---, the environmentally
More informationPharmaceutical Facility Design
PhEn-602 Pharmaceutical Facility Design J. Manfredi Notes 9A PhEn-602 J. Manfredi 1 Primary & Secondary HVAC units Primary Primary air handling unit arrangement: One unit is responsible for all of the
More informationUNDERSTANDING AND USING THE HVAC DESIGN REVIEW FORM
Page 1 UNDERSTANDING AND USING THE HVAC DESIGN REVIEW FORM Each of the 38 points of requested information is discussed, and references to the supporting manual are given to substantiate the requirement.
More informationTDSHS Air Change Requirements and the Basics of Psychrometrics. Presented by: Aric Murray December 06, 2013
TDSHS Air Change Requirements and the Basics of Psychrometrics Presented by: Aric Murray December 06, 2013 Agenda 1. What are the air change requirements and how do you calculate them? 2. Why are air change
More informationVERSECON Indoor Vertical Self-Contained Air Conditioner YSWU Ton Water-Cooled
FORM 145.05-EG1 (1004) VERSECON Indoor Vertical Self-Contained Air Conditioner YSWU 10 105 Ton Water-Cooled Table of Contents FORM 145.05-EG1 (0804) Features and Benefits.....................................................
More informationCOMMERCIAL PACKAGED HEAT PUMP AIR HANDLER UNITS, 6 20 TONS
Product Specifications COMMERCIAL PACKAGED HEAT PUMP AIR HANDLER S, 6 20 TONS BUILT TO LAST, EASY TO INSTALL AND SERVICE Multi position design for horizontal or vertical installation without modification.
More informationModular Active. Chilled. Beams
Modular Active Chilled Beams How Twa MAC Beams Work Primary air (100% outside air) is dehumidified to between 50-57 F dew point and is used to: control the latent requirements of the space, provide fresh
More informationENGINEERING LETTER 4
ENGINEERING LETTER 4 The New York Blower Company 7660 Quincy Street, Willowbrook, Illinois 60521-5530 TEMPERATURE AND ALTITUDE AFFECT FAN SELECTION INTRODUCTION Fan performance changes with the density
More informationIBIS INTERNATIONAL, INC. DESIGN STANDARDS FOR DUCTING OF EQUIPMENT
IBIS INTERNATIONAL, INC. DESIGN STANDARDS FOR DUCTING OF EQUIPMENT INTRODUCTION This bulletin will assist in the design and modification of ducting used to connect IBIS equipment to machinery or areas
More informationInffusers. idl20 (2 WAY) ids60 (4 WAY)
Inffusers idl20 (2 WAY) ids60 (4 WAY) built on innovation what is an inffuser? DADANCO s INFFUSERS are quite simply an induction diffuser that uses special nozzles located in the underside of the air plenum
More informationSTANDARD EFFICIENCY PACKAGE A/C UNIT to 216 MBtuh
PAS Product Specifications STANDARD EFFICIENCY PACKAGE A/C UNIT - 74 to 26 MBtuh REFRIGERATION CIRCUIT All models are equipped with high efficiency scroll compressor on each circuit. Dual, electrically
More informationProduct Data FEATURES/BENEFITS 524J***H 6 TO 20 TON DIRECT EXPANSION PACKAGED HEAT PUMP AIR -HANDLING UNIT. Indoor air quality features 524J-H 07-12
524J***H 6 TO 20 TON DIRECT EXPANSION PACKAGED HEAT PUMP AIR -HANDLING Product Data the environmentally sound refrigerant Certified to ISO 9001 524J-H 07-12 524J-H 16-25 C10899 Bryant s versatile packaged
More informationAdvance Release September 2009
Vertical Air Cooled DSV Series R 410A Model DSV096 DSV120 DSV144 DSV180 Nominal Cooling (Tons) 8 10 12 15 Refrigerant R 410A R 410A R 410A R 410A Cooling Performance Gross Cooling Capacity(Btu/h) 95,000*
More informationProduct Data FEATURES/BENEFITS. 524J PACKAGED AIR -HANDLING UNITS WITH PURONr REFRIGERANT SIZES 07, 08, 12, 14, 16. Indoor air quality features
PACKAGED AIR -HANDLING S WITH PURONr REFRIGERANT SIZES,,,, --- Product Data C09311 Bryant s versatile packaged air-handling units satisfy design requirements with: S Multi-position design for horizontal
More informationFan Laws. Keith Miller. Samuel Tepp Associates. Paul Cenci, P. E.-Principal Brian England-Principal. Samuel Tepp Associates 1/6/10
Fan Laws Keith Miller Samuel Tepp Associates Paul Cenci, P. E.-Principal Brian England-Principal Basic Terms CFM - Cubic Feet per Minute, volume (amount) of air being moved SP - Static Pressure, resistance
More informationIn the past, contractors sized heating and cooling systems GETTING HVAC RIGHT
GETTING HVAC RIGHT Calculating loads is just the first step. For a trouble-free system that s long on comfort, you need to specify the equipment, design the ductwork, and make certain everything is correctly
More informationStandards and Guidelines. Presented by: Aric Murray December 12, 2014
TDSHS Ventilation Standards and Guidelines Presented by: Aric Murray December 12, 2014 Agenda 1. What are the TDSHS ventilation 1. What are the TDSHS ventilation requirements? 2. Pressure relationships.
More informationJim Aswegan Chief Engineer
Displacement Ventilation Jim Aswegan Chief Engineer Displacement Ventilation Systems Comfort & Contaminate Control DV Concepts & System Benefits Outlet Types and Air Patterns Example l Space Layouts Displacement
More informationHood Depot Internatioonal, Inc., Phone S. Powerline Road, Deerfield Beach, FL
The Kitchen Cool by Hood Depot is a conditioned make up air unit design with flexibility, form and function kept in mind. Our unit offers a variety of configurations that allow the customer to customize
More informationCompany Acme HVAC Inc. Customer James Allen Preparer J White Address 3652 Shady LaneAnywhere, Earth Phone
Company Acme HVAC Inc. Customer James Allen Preparer J White Address 3652 Shady LaneAnywhere, Earth Phone 252-555-7493 Phone 555-576-3764 Date 12/9/10 This HVAC load calculation has been performed using
More informationCOMMERCIAL AIR HANDLER
COMMERCIAL AIR HANDLER FORM NO. H11-529 REV. 6 Supersedes Form No. H11-529 Rev. 5 Featuring Industry Standard R-410A Refrigerant RHGL- 090, 120, 180 & 240 SERIES NOMINAL SIZES 7.5, 10, & 20 TONS [26, 35,
More informationProduct Data. 50HS Single-Package Heat Pumps to 5 Nominal Tons
Product Data 50HS Single-Package Heat Pumps 1 1 2 to 5 Nominal Tons Single-Package Heat Pump for Manufactured Housing/Residential and Light Commercial use. Features/Benefits One-piece heat pumps with optional
More informationHVAC Systems What the Rater Needs to Know in the Field CALCS-PLUS
HVAC Systems What the Rater Needs to Know in the Field This presentation used CASE* studies from the following *CASE Copy And Steal Everything HVAC Systems - What the Rater Needs to Know in the Field This
More informationUse this Construction/HVAC Glossary to answer the questions below.
www.garyklinka.com Page 1 of 21 Instructions: 1. Print these pages. 2. Circle the correct answers and transfer to the answer sheet on the second last page. 3. Page down to the last page for the verification
More informationFans: Features and Analysis
Technical Development Program COMMERCIAL HVAC EQUIPMENT Fans: Features and Analysis PRESENTED BY: Michael Ho Version 1.2 Menu Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section
More informationTechnical Development Program
Technical Development Program PRESENTED BY: James Parker Insert your logo here AIR HANDLERS Coils: Direct Expansion Chilled Water and Heating Menu Section 1 Introduction Section 2 Typical Coil Applications
More informationCERV Fan and Duct Sizing Information
CERV Fan and Duct Sizing Information Scope Duct design for distributing fresh air and exhausting house air requires two considerations: 1) Sufficiently large ducts for available fan static pressure 2)
More informationASHRAE JOURNAL ON REHEAT
Page: 1 of 7 ASHRAE JOURNAL ON REHEAT Dan Int-Hout Chief Engineer Page: 2 of 7 Overhead Heating: A lost art. March 2007 ASHRAE Journal Article Dan Int-Hout Chief Engineer, Krueger VAV terminals provide
More informationInstallation, Operation, and Maintenance Information
Installation, Operation, and Maintenance Information Air Cooled Condensers 8-2016 Rev 0 Table of Contents General Safety Information 2 Inspection 2 Installation 2 6 Rigging and Assembly 2 Unit Location
More informationFG7T (C and L Series)
TECHNICAL SPECIFICATIONS FG7T (C and L Series) WARRANTY Smartlite Two Stage, Variable Speed, Condensing Upflow/Horizontal and Downflow Gas Furnaces Induced Draft - 95.1 AFUE Input 60,000-120,000 Btuh The
More informationCOMMERCIAL AIR HANDLER
COMMERCIAL AIR HANDLER FORM NO. H11-532 Featuring Earth-Friendly R-410A Refrigerant earth friendly refrigerant RHGM- 090 & 120 SERIES NOMINAL SIZES 7.5 & 10, TONS [26 & 35 kw] TABLE OF CONTENTS Unit Features...3
More informationAir-Cooled Condensers
CH-RACCTB APR 2015 Replaces CH-RACCTB April 2011 Air-Cooled Condensers Technical Guide Models WSS Table of Contents Features & Options...2 Condenser Selection... 3-4 Performance Data...5 Dimensional Data...5
More informationProblems Air and Water Distribution Systems
Problems Air and Water Distribution Systems ME419 D. Abata 1. Cooled air at 1 atm, 50 F, and 10% relative humidity is transported in a 600 ft long circular sheet metal duct at a rate of 800 cfm. If the
More informationAIR CONDITIONING. Carrier Corporation 2002 Cat. No
AIR CONDITIONING Carrier Corporation 2002 Cat. No. 020-016 1. This refresher course covers topics contained in the AIR CONDITIONING specialty section of the North American Technician Excellence (NATE)
More informationA/C Cooling Load calculation and measurement
Testo Inc. 40 White Lake Rd. Sparta NJ 07871 (800) 227-0729 A/C Cooling Load calculation and measurement When we talk about sizing an air conditioning appliance (tons of cooling, BTU/h or KW), we are specifying
More informationDesign Guide. Ecosmart Mini Duct Trunk and Outlet Design Guide for HVP50, HVP90 and HVP100 Air Handlers P/N 14013A
Design Guide Ecosmart Mini Duct Trunk and Outlet Design Guide for HVP50, HVP90 and HVP100 Air Handlers P/N 14013A Contents OVERVIEW... 2 EQUIPMENT SELECTION... 2 OUTLET LOCATIONS... 3 TRUNK DESIGN... 3
More informationCork Institute of Technology Higher Certificate in Engineering in Building Services Engineering Award
Cork Institute of Technology Higher Certificate in Engineering in Building Services Engineering Award Instructions Answer FIVE questions, All questions carry equal marks. (NFQ Level 6) Autumn 2006 Building
More informationENERGY STAR Qualified Homes
ENERGY STAR Qualified Homes HVAC SYSTEM QUALITY INSTALLATION RATER CHECKLIST 1 For Version 3 Part 2 of HVAC Quality Installation PRESENTED BY: Rocky Mountain Power wattsmart New Homes Program & Questar
More informationASHRAE 90.1 EFFICIENCY PACKAGE AIR CONDITIONER UNIT MBtuh
PAE Product Specifications ASHRAE 90.1 EFFICIENCY PACKAGE AIR CONDITIONER UNIT - 278 MBtuh REFRIGERATION CIRCUIT All models are equipped with high efficiency scroll compressor on each circuit. Dual, Electrically
More informationSYNOPSIS. Part-Load Control Strategies for Packaged Rooftop Units. In this issue... Bin Hour Profile Charlotte, NC
VOLUME ONE NUMBER THREE SYNOPSIS A N H V A C N E W S L E T T E R F O R B U I L D I N G O W N E R S A N D M A N A G E R S In this issue... Part-Load Strategies Why they re important.......... 1 What Things
More informationIDL20e (2 way discharge) IDS60e (4 way discharge) Inffusers. UDI (vertical discharge) Frequently Asked Questions
IDL20e (2 way discharge) IDS60e ( way discharge) Frequently Asked Questions UDI (vertical discharge) Inffusers INFFUSER FREQUENTLY ASKED QUESTIONS The following are frequently asked questions (FAQ s) on
More informationResidential HVAC System Design
Residential HVAC System Design Crosswalk to NATE Competencies and Tasks The following North American Technical Excellence (NATE) competencies and tasks are covered in this publication. These competencies
More informationEPH - International Journal of Science and Engineering
HVAC DUCT DESIGN KARTHIKEYAN N 1,PUGALARASU R 2, AJAYRAGUL A.G 3, RAGUNANDHAN S 4, RAHUL P 5. 1 ASSISTANT PROFESSOR, K.S.R COLLEGE OF ENGINEERING, TIRUCHENGODE, TAMILNADU, INDIA. 2.3.4&5 B.E MECHANICAL
More informationAir Conditioning Clinic
Air Conditioning Clinic Psychrometry One of the Fundamental Series D C B A C B D A July 2012 TRG-TRC001-EN Psychrometry One of the Fundamental Series A publication of Trane Preface Psychrometry A Trane
More informationWhat is a High Velocity System?
What is a High Velocity System? What s different? Original concept introduced in 1946 for heat in aircraft High Velocity Systems utilize two or three inch outlets and distribution tubes to deliver the
More informationRittling Induction Units Catalog
Rittling Induction Units Catalog Heating Cooling Fresh Air Clean Air Zehnder everything you need to create a comfortable, healthy and energy-efficient indoor climate Heating, cooling, fresh and clean air:
More informationDCC Series. Submittal Data Form. 7½- to 12½-Ton Three-Phase Packaged Air Conditioners
DCC Series Submittal Data Form Job Name Purchaser Order No. Engineer Unit No. Model No. Unit Designation Performance Data Certified By: 7½- to 12½-Ton Three-Phase Packaged Air Conditioners Up to 11.3 EER
More informationDCG Series. Submittal Data Form. 7½- to 12½-Ton Three-Phase Packaged Air Conditioners
DCG Series Submittal Data Form Job Name Purchaser Order No. Engineer Unit No. Model No. Unit Designation Performance Data Certified By: Cabinet Features Heavy-gauge, galvanized-steel cabinet with UV-resistant
More informationCase 13 Food Storage & Processing Center
Case 13 Food Storage & Processing Center Copy Right By: Thomas T.S. Wan ( ) Feb. 2, 2002 All Rights Reserved Case Background: The refrigeration system is for a food processing and storage facility. The
More informationProduct Data. Features/Benefits. 28CB, 28LA Direct-Expansion. evaporator coils. 7 1 / 2 and 10 Nominal Tons Cooling
Product Data 28CB, Direct-Expansion Evaporator Coils 7 1 / 2 and 10 Nominal Tons Cooling 28CB Direct-expansion evaporator coils easily accommodate upflow or horizontal light-commercial applications Features/Benefits
More informationMECCI Engineers. Institute of Engineering Design & Research
MECCI Engineers Institute of Engineering Design & Research (An ISO 9001:2015 DAC International Certification for EPC Consulting, Engineering Project & Training Company) HVAC Design Course Content For Regular
More informationWhen Duct Sealing Kills HVAC Equipment and Efficiency
When Duct Sealing Kills HVAC Equipment and Efficiency National Comfort Institute is an international training and development company headquartered in Cleveland, Ohio, with offices in Nashville, Tennessee,
More informationIntroduction to HVAC. American Standard Inc Air Conditioning Clinic TRG-TRC018-EN
Introduction to HVAC Agenda Psychrometrics Human Comfort Heat Transfer Refrigeration Cycle HVAC Terminology HVAC Systems Introduction to HVAC Psychrometrics 2000 TRG-TRC002-EN Properties of Air Dry-bulb
More informationTECHNICAL SPECIFICATIONS
TECHNICAL SPECIFICATIONS Model PGC2T (C and L) Series SmartStart M1200 Product Line Two Stage, Variable Speed, High Efficiency Upflow/Horizontal and Downflow Gas Furnaces 95.1 AFUE Input 60,000-120,000
More information50HS018, 024, 030, 036, 042, 048 & 060 STANDARD-EFFICIENCY COMBINATION HEAT PUMP UNITS W/OPTIONAL ELECTRIC HEAT
-1SB 018, 024, 030, 036, 042, 048 & 060 STANDARD-EFFICIENCY COMBINATION HEAT PUMP S W/OPTIONAL ELECTRIC HEAT PERFORMANCE DATA CERTIFIED DIMENSION PRINT CERTIFIED ROOF CURB DIMENSION PRINT 1997 Carrier
More informationTHE PSYCHROMETRIC CALCULATOR By: Stanley F. Gallos, The Bastian-Blessing Company INTRODUCTION PROPERTIES OF THE RSES CALCULATOR
Source Application Manual SAM Chapter 620-20 Section 03 THE PSYCHROMETRIC CALCULATOR By: Stanley F. Gallos, The Bastian-Blessing Company INTRODUCTION Problems involving changes in temperature, humidity,
More informationContents INDEX. TDM Series Indirect Fired Heaters
Contents Typical Indoor Installations................... 000 Indoor Unit Dimensions (Vertical).............. 000 Indoor Unit Dimensions (Horizontal)............ 000 Outdoor Unit Dimensions.....................
More informationDisplacement Ventilation
Displacement Ventilation Displacement Ventilation Displacement Ventilation vs. Dilution Ventilation Characteristics Design Considerations Layout and Selection Product Overview Casino Case Study Dilution
More informationProduct Data. Features/Benefits. 28CB, 28LA Direct-Expansion. evaporator coils. 7 1 / 2 and 10 Nominal Tons Cooling
Product Data 28CB, 28LA Direct-Expansion Evaporator Coils 7 1 / 2 and 10 Nominal Tons Cooling 28CB Copyright 2001 Carrier Corporation 28LA Direct-expansion evaporator coils that easily accommodate upflow
More informationActive Chilled Beams
T 2.4/12/US/7 Active Chilled Beams DID61 and DID62 series TROX USA, Inc. 405 Settingdown Circle www.troxusa.com Cumming, GA 0028 e-mail trox@troxusa.com Telephone 770.569.14 Facsimile 770.569.14 Contents
More information48SS018, 024, 030, 036, 042, 048 & 060 STANDARD-EFFICIENCY COMBINATION GAS HEATING/ ELECTRIC COOLING UNITS
-3SB 018, 024, 030, 036, 042, 048 & 060 STANDARD-EFFICIENCY COMBINATION GAS HEATING/ ELECTRIC COOLING S PERFORMANCE DATA CERTIFIED DIMENSION PRINT CERTIFIED ROOF CURB DIMENSION PRINT 1997 Carrier Corporation
More informationINDOOR, SUSPENDED, STEAM OR HOT WATER HYDRONIC UNIT HEATER FOR VERTICAL OR HORIZONTAL CONFIGURATION
INDOOR, SUSPENDED, STEAM OR HOT WATER HYDRONIC UNIT HEATER FOR VERTICAL OR HORIZONTAL CONFIGURATION Contents MODEL WS... 2 STANDARD FEATURES... 2 TECHNICAL DATA... 3 DIMENSIONS... 3 ENGINEERING DATA...
More informationProduct Data. 95% AFUE Single Stage Furnace Upflow / Downflow / Horizontal. ama ! WARNING
DIRECT OR NON -DIRECT VENT 4-WAY MULTIPOISE CONDENSING GAS FURNACE 95% AFUE Single Stage Furnace Upflow / Downflow / Horizontal FLEXIBILITY S Dual certified venting (1 or 2 pipes) Direct Vent furnace S
More informationSeries HF custom designed flange and insert heaters.
Page 1 - GENERAL INFORMATION A - INTRODUCTION 1 - GENERAL DESCRIPTION A Duct Heater is a self contained heater designed to be installed in the field in an air stream of a duct system, external to the air
More informationDCC Commercial. Submittal Data Form. 7½ - 12½ Ton Packaged Air Conditioners Up to 11.3 EER Cooling Capacity: 88, ,000 BTU/h
Submittal Data Form Job Name Purchaser Order No. Engineer Unit No. Model No. Unit Designation Performance Data Certified By: DCC Commercial 7½ - 12½ Ton Packaged Air Conditioners Up to 11.3 EER Cooling
More informationSite address. Ventilation Quantity (Determine quantity by using Table N or Equation 11-1) Continuous ventilation
City of Victoria Building Inspections Department 7951 Rose Street P. O. Box 36 Victoria, MN 55386 (952) 443-4210 Ventilation, Makeup and Combustion Air Calculations Instructions and Example These instructions
More informationELECTRICAL QUANTITY WEIGHT (LB)
VRF SYSTEM INDOOR UNIT ENTERING AIR TEMPERATURES ( F) CAPACITIES (kbtuh) Max SOUND ELECTRICAL WEIGHT TOSHIBA-CARRIER COOLING HEATING Airflow PRESSURE, MARK NO. TYPE ROOM TOTAL SENSIBLE HEATING V / Ø /
More informationDesiccant Dehumidifier
Since the 1950s Desiccant Dehumidifier Dry Spaces With NO Added Heat BMIL Technologies, LLC 4915 Arendell St., #313 Morehead City, NC 28557 PH 252-727-0994 FAX 252-727-0996 WWW.BMIL.COM Product Description
More informationNH 3. Dual Discharge Evaporator. Ammonia Industrial Applications 1-16 Tons MDAN
NH 3 Dual Discharge Evaporator Ammonia Industrial Applications 1-16 Tons MDAN > > U s e d f o r S m a l l t o m e d i u m I n d u s t r i a l A m m o n i a a p p l i c a t i o n s Manufactured with Stainless
More informationSECTION 5 COMMERCIAL REFRIGERATION UNIT 22 CONDENSERS UNIT OBJECTIVES UNIT OBJECTIVES 3/22/2012
SECTION 5 COMMERCIAL REFRIGERATION UNIT 22 CONDENSERS UNIT OBJECTIVES After studying this unit, the reader should be able to explain the purpose of the condenser in a refrigeration system. describe differences
More informationProduct Data. Features/Benefits. 50HS Single-Package Heat Pump Units 50 Hz
Product Data 50HS Single-Package Heat Pump Units 50 Hz Nominal: 7 to 18 kw (2 to 5 Tons) Single-Package Heat Pump for Manufactured Housing/Residential and Light Commercial use. Features/Benefits One-piece
More informationZoning System Design Manual
Zoning Made Effortless 70-2321-03 Introduction The Concept of Zoning The basic principle of forced air zoning is to allow one HVAC system to be controlled by multiple thermostats, heating and cooling a
More informationProduct Data. 50ZP (60Hz) Single-Package. Air Conditioners 3-5 Nominal Tons
(60Hz) Single-Package Air Conditioners 3-5 Nominal Tons Product Data The is a package air conditioner for manufactured housing, residential, and light commercial applications. The unit design is the result
More informationUNIT 1 AIR CONDITIONING 1. Write the various psychometric processes? Explain any four processes with neat sketches?
SIDDHARTH INSTITUTE OF ENGINEERING & TECHNOLOGY :: PUTTUR (AUTONOMOUS) (Approved by AICTE, New Delhi & Affiliated to JNTUA, Anantapuramu) (Accredited by NBA & Accredited by NAAC with A Grade) (An ISO 9001:2008
More informationProduct Data. Features/Benefits. 36CBAC,AE,AF,AH,AQ,AN, PB,PD,PS Series Active and Passive Chilled Beams. 11 to 190 cfm
Product Data 36CBAC,AE,AF,AH,AQ,AN, PB,PD,PS Series Active and Passive Chilled Beams 11 to 190 cfm 36CBAC A36-449.eps Chilled beam units offer: An increase in total airflow Sensible cooling and heating
More informationHAP e-help. Modeling Induction Beams in HAP v4.8 QB TIP 001
This HAP e-help provides a high-level overview of induction beams, how they work and how to model them in HAP 4.8 (and later versions). The first half of the article explains how induction beams work.
More informationENGINEERING BULLETIN. Overview of Chilled Beam Technology. Purpose. Summary. Theory
Overview of Chilled Beam Technology Purpose Chilled beam technology is new to the United States but has been used in Europe since the 1950 s. Chilled beams can reduce energy costs, improve indoor air quality,
More informationUnico Training. Class for R E Michel Salesmen
Class for R E Michel Salesmen Outlet (UPC-56B) Sound Attenuator (UPC-26C) Elbow Plenum Supply Tubing (UPC-25) Blower Modules (2430,3642, 4860) Heating Module (MH2430, MH3660) Cooling Modules (MC2430, MC3642,
More informationProduct Data. Features/Benefits. 50HX High Efficiency Single-Packaged Heat Pumps. 2 to 5 Nominal Tons
Product Data 50HX High Efficiency Single-Packaged Heat Pumps 2 to 5 Nominal Tons UNIT 50HX High Efficiency, Single-Packaged Heat Pump for Manufactured Housing and Residential use. Features/Benefits One-piece
More informationK*ES120 DESCRIPTION TECHNICAL GUIDE SPLIT-SYSTEM EVAPORATOR BLOWERS 10 NOMINAL TONS EER 8.5 ACCESSORIES FIELD INSTALLED TABLE 1: ARI RATINGS*
TECHNICAL GUIDE SPLIT-SYSTEM EVAPORATOR BLOWERS K*ES120 10 NOMINAL TONS EER 8.5 DESCRIPTION These completely assembled dual circuit evaporator blower units include a well-insulated cabinet, a DX cooling
More informationIndoor Pool Design Considerations Colorado Springs, Colorado
Indoor Pool Design Considerations Colorado Springs, Colorado September 20, 2018 Presentation by Eric S. Johnson, P.E. LifeMember, ASHRAE, Austin Chapter DESIGN CONSIDERATIONS HUMIDITY CONTROL FOR INDOOR
More informationEXHAUST FAN SCHEDULE
DUCTWORK SCHEDULE CONCEALED SUPPLY AIR RECTANGULAR, RTU CONCEALED SUPPLY AIR RECTANGULAR, ERV CONCEALED SUPPLY AIR ROUND, RTU CONCEALED SUPPLY AIR ROUND, ERV EXPOSED SUPPLY AIR ROUND RUNOUTS RETURN AIR
More informationFor an ideal gas mixture, Dalton s law states that the sum of the partial pressures of the individual components is equal to the total pressure.
1 PSYCHROMETICS Psychrometry is the study of the characteristics of moist air. We will see soon that evaporation of moisture from the skin can have a significant impact on thermal comfort. The rate of
More informationSAFETY AND INSTALLATION MANUAL MODEL 8100
SAFETY AND INSTALLATION MANUAL ENERGY RECOVERY VENTILATORS MODEL 8100 Provides year-round fresh air Recovers 77% of the apparent heating or cooling energy from the exhausted air See Warnings Page 3 Table
More informationAIR-CONDITIONING SYSTEMS AND APPLICATIONS. Abdullah Nuhait Ph D. King Saud University
AIR-CONDITIONING SYSTEMS AND APPLICATIONS Abdullah Nuhait Ph D. King Saud University AIR-CONDITIONING SYSTEMS Earliest air conditioning system used only for heating (winter) Provided heated air for comfort
More informationAdvance Product Data. Features/Benefits. 42WKN Hydronic Fan Coil Units
Advance Product Data 42WKN Hydronic Fan Coil Units 3 4 to 2 1 2 Tons UNIT SIZES 004-010 UNIT SIZES 016,020 The new Carrier Hydronic Cassette offers a modern solution for a wide variety of small and medium
More informationINSTALLATION INSTRUCTIONS FMB/FMC SERIES MULTI-POSITION AIR HANDLER
ASPEN MANUFACTURING 373 ATASCOCITA RD. HUMBLE, TX 77396 TEL (281) 441-6500 FAX (281) 441-6510 > INSTALLATION INSTRUCTIONS FMB/FMC SERIES MULTI-POSITION AIR HANDLER IMPORTANT: "The
More informationb.) Technical Information:
Section VI- Strategies a.) Summary: It is important for new construction designers to consider the heating, ventilation, and air conditioning needs within a building. There are many different systems,
More informationChilled Water DOAS Fan Powered Terminal Units
Chilled Water DOAS Fan Powered Terminal Units CHILLED WATER DOAS FAN POWERED TERMINAL UNITS DOAS TERMINAL UNITS FEATURES AND BENEFITS MINIMUM VENTILATION CONTROL The DOAS unit provides the Designer, Owner
More informationA Treatise on Liquid Subcooling
A Treatise on Liquid Subcooling While the subject of this article is Liquid Refrigerant Subcooling, its affect on the operation of the thermostatic expansion valve (TEV), and ultimately on system performance
More informationSECTION SPECIFICATION FOR HI-VELOCITY FAN COIL SYSTEMS
1.0 GENERAL SECTION 15740 SPECIFICATION FOR HI-VELOCITY FAN COIL SYSTEMS 1.01 DESCRIPTION Item A. Scope This section specifies four sizes of fan coil units designed for hydronic heating and air conditioning.
More informationEngineering Guide VAV Diffusers. Please refer to the Price Engineer s HVAC Handbook for more information on VAV Diffusers.
VAV Diffusers lease refer to the rice Engineer s HVAC Handbook for more information on VAV Diffusers. Diffuser Types Ceiling Diffusers Conventional air distribution systems typically group several rooms
More information