and air conditioning units

... transfer at the interface and this simplifies predictions of the performance of air- conditioning coils [1, 5, 9]. Refrigeration and Air- Conditioning Preface Refrigeration and its application is ... metals 0.02–0.28 The metals used in refrigeration and air- conditioning systems, such as steel, copper and aluminium, quickly oxidize or tarnish in air, and the emissivity figure will increase to a ... removing heat. Air- conditioning: A form of air treatment whereby temperature, humidity, ventilation, and air cleanliness are all controlled within limits determined by the requirements of the air conditioned enclosure. BS...

Ngày tải lên: 05/03/2014, 19:20

... or carbon dioxide (40 p.s.i.g.) and check all the joints with a soap solution. Release the pressure and repair any leaks that may have been found. After the leaks have been repaired, charge the system ... p.s.i.g. and leak test with a halide leak detector. Purge the system and repair all leaky joints that you may have found. Do not allow the compressor to build up pressure since overheating and damage ... humidity controller, and the space temperature rises because the discharge air is too warm to cool the space, the thermostat will open the D/X coil valve and modulate the face and bypass damper...

Ngày tải lên: 05/03/2014, 19:20

... addresses HFC and PFC emissions fr om users of refrigeration and air con- ditioning equipment including household refriger- ation, domestic air conditioning and heat pumps, mobile air conditioning, ... HFC and PFC emis- sions from air conditioning equipment and process or fugitive related emissions. Partners should refer to this guidance document for cal- culating GHG emissions from air conditioning ... for refrigeration and air conditioning equipment and a second for fire suppression equipment. 1 See Chapter 1 of the Climate Leaders Design Principles for more on materiality and significance...

Ngày tải lên: 08/03/2014, 19:20

... Mechanical Technology Refrigeration and Air Conditioning - 60 - Topics (Practice)  Window, Split, Package and Roof-Top Units Water Chillers  Air Handling Units  Air Distribution Systems  Fans ... Draw and describe Ref. and A/C systems' power and control circuits. Ref. and A/C systems' power and control circuits 4 Department of Mechanical Technology Refrigeration and Air Conditioning ... Ventilation, Air Conditioning and Refrigeration” Author: Henry W. Puzio & Jim Johnson Publisher: Delmar Textbook: 1-“Modern Refrigeration and Air Conditioning Author: Andrew D. Althouse,...

Ngày tải lên: 01/04/2014, 00:20

... information on how to cut your air conditioning costs please refer to our dedicated Air Conditioning Advice pages Train staff on how to operate air conditioning units and heating controls Staff ... instructions on individual units and ensure that remote controls have accessible and obvious storage spaces. Menu help 11Heating, ventilation and air conditioning Understanding and using controls An ... operating temperatures and how to set heating or cooling units correctly. Louvres (movable slats to guide the cool or heated air) are a feature on most air conditioning units and staff should be...

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Ngày tải lên: 29/06/2014, 11:20

... publication of ASHRAE Standard 90.1-1999 and ASHRAE Standard 62-1999, often called the Energy standard and Indoor Air Qual- ity standard, the second edition of Handbook of Air Conditioning and Refrigeration ... Conditioning Systems 1.4 Evaporative-Cooling Air Conditioning Systems 1.4 Desiccant-Based Air Conditioning Systems 1.4 Thermal Storage Air Conditioning Systems 1.5 Clean-Room Air Conditioning Systems 1.5 Space Conditioning Air Conditioning Systems 1.5 Unitary ... and energy simulation. INTRODUCTION 1.25 CHAPTER 1 INTRODUCTION 1.1 1.1 AIR CONDITIONING 1.1 1.2 COMFORT AND PROCESSING AIR CONDITIONING SYSTEMS 1.2 Air Conditioning Systems 1.2 Comfort Air Conditioning...

Ngày tải lên: 29/10/2013, 20:15

... are 2.4 CHAPTER TWO FIGURE 2.1 Mass and pressure of dry air, water vapor, and moist air. where n a ϭ number of moles of dry air, mol n w ϭ number of moles of water vapor in moist air sample, mol n ws ϭ ... vapor in saturated moist air sample, mol Moist air is a binary mixture of dry air and water vapor; therefore, we find that the sum of the mole fractions of dry air x a and water vapor x w is equal ... properties of moist air is based on the formula- tions developed by Hyland and Wexler of the U.S. National Bureau of Standards. The psychromet- ric chart and tables of ASHRAE are constructed and calculated...

Ngày tải lên: 29/10/2013, 20:15

... Heating Load 9.7 Air Handling Units and Packaged Units 9-65 Terminals and Air Handling Units • Packaged Units • Coils • Air Filters • Humidifiers 9.8 Refrigeration Components and Evaporative ... 1999 by CRC Press LLC Air- Conditioning and Refrigeration 9.1 Introduction 9-2 Air- conditioning • Air- Conditioning Systems • Air- Conditioning Project Development and System Design 9.2 ... Processes and Cycles 9-18 Air- Conditioning Processes • Space Conditioning, Sensible Cooling, and Sensible Heating Processes • Humidifying and Cooling and Dehumidifying Processes • Air- Conditioning...

Ngày tải lên: 14/03/2014, 19:27

... tools, and a combination file/reamer are included in the kit. GAGES AND INSTRUMENTS It is impossible to install or service air- conditioning and refrigeration units and systems without using gages and instruments. A ... be measured accurately if air- conditioning and refrigeration equipment is to be operated properly. Refrigeration and air- conditioning units must be properly serviced and monitored if they are ... voltage and current changes can affect the operation of air- conditioning and refrigera- tion units. Gages and Instruments 9 Fig. 1-19 AC and DC voltage probe voltmeter. (Amprobe) Fig. 1-20 Voltage and...

Ngày tải lên: 08/04/2014, 11:38

... LIỆU THAM KHẢO American Society Heating Refrigeration and Air Conditioning. ASHRAE Hand Book. 2001 Arora, C.P. Refrigeration and Air Conditioning. Second edition. Tata McGraw-Hill Publishing ... Efficiency and Renewable Energy. www.eere.energy.gov Copyright: Copyright © United Nations Environment Programme (year 2006) This publication may be reproduced in whole or in part and in any ... Asia and the Pacific" (GERIAP) by the National Productivity Council, India. While reasonable efforts have been made to ensure that the contents of this publication are factually correct and...

Ngày tải lên: 12/04/2014, 10:23

... 3 City & Guilds offer air- conditioning training at level 3 of their Progression Award, Unit 7 – Diagnose faults and repair systems and components – air- conditioning and climate control. Fm-H6955.qxd ... of the vehicle. Air vents Air vents must be ergonomically designed to avoid draughts.Directional air vents generally have three adjustments,up and down,left and right and open and closed.Circular ... Guilds 6048 Motor Vehicle Air Conditioning (Service and Repair) The City & Guilds 6048 Motor Vehicle Air Conditioning certificate is a recognised qualification and the course covers the underpinning...

Ngày tải lên: 06/05/2014, 11:29

... guides, and snaprings are installed in the plunger cylinders. Compress the snaprings and force them into their grooves. Place a new bearing head gasket and the bearing head into position and bolt ... p.s.i.g. Disconnect the valve and plug the tube ends. Remove the screen and clean it with a recommended cleaning solvent. After the screen is clean and dry, reinstall it in the valve and connect the valve ... compressor, and start the unit. Figure 20 shows two different types of strainers, basket and disc, and their location in the compressor motor. 10. Purging noncondensable gases. Noncondensable gases (air) ...

Ngày tải lên: 20/06/2014, 17:20