Air Conditioning and Refrigeration Chronology
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Preparing HVAC Systems Before Reoccupying a Building by JOHN MCCARTHY, SC.D., C.I.H., MEMBER ASHRAE; KEVIN COGHLAN, C.I.H
TECHNICAL FEATURE This article was published in ASHRAE Journal, January 2021. Copyright 2020 ASHRAE. Posted at www.ashrae.org. This article may not be copied and/or distributed electronically or in paper form without permission of ASHRAE. For more information about ASHRAE Journal, visit www.ashrae.org. Preparing HVAC Systems Before Reoccupying A Building BY JOHN MCCARTHY, SC.D., C.I.H., MEMBER ASHRAE; KEVIN COGHLAN, C.I.H. As states across the U.S. roll out new phases of reopening and ease social distanc- ing restrictions instituted to “flatten the curve” of infection from SARS-CoV-2 (the virus that causes COVID-19), commercial building owners and facility manag- ers are seeking direction in preparing their spaces to a return to near-normal levels of occupancy. World Health Organization (WHO) and Centers for Disease Control and Prevention (CDC) recommendations have focused on “de-densifying” spaces and disinfection of surfaces, while the ASHRAE Epidemic Task Force’s comprehen- sive Building Readiness guidance addresses strategies for preparing HVAC systems for buildings reopening after COVID-19 closures.1 Still, facility engineers have been wondering whether disinfecting their facility’s HVAC system is a further protective step to take to prepare for reopening—and about what else they should do. While no blanket answer exists to fit every scenario reduced loads or turned off as an energy-saving and every building type, the current science2 indicates measure. that, in general, disinfection of mechanical systems is not likely to be necessary. However, that doesn’t mean How SARS-CoV-2 Transmission Impacts Disinfection there isn’t work to be done—or risks to address before Recommendations reopening or expanding the number of occupants To understand why HVAC system disinfection may not in the space. -
Wind- Chimney
WIND-CHIMNEY Integrating the Principles of a Wind-Catcher and a Solar-Chimney to Provide Natural Ventilation A Thesis presented to the Faculty of California Polytechnic State University, San Luis Obispo In Partial Fulfillment of the Requirements for the Degree Master of Science in Architecture by Fereshteh Tavakolinia December 2011 WIND-CHIMNEY Integrating the Principles of a Wind-Catcher and a Solar-Chimney to Provide Natural Ventilation © 2011 Fereshteh Tavakolinia ALL RIGHTS RESERVED ii COMMITTEE MEMBERSHIP TITLE: WIND-CHIMNEY Integrating the Principles of a Wind-Catcher and a Solar-Chimney to Provide Natural Ventilation AUTHOR: Fereshteh Tavakolinia DATE SUBMITTED: December 2011 COMMITTEE CHAIR: James A. Doerfler, Associate Department Head COMMITTEE MEMBER: Jacob Feldman, Professor iii WIND-CHIMNEY Integrating the principles of a wind-catcher and a solar chimney to provide natural ventilation Fereshteh Tavakolinia Abstract This paper suggests using a wind-catcher integrated with a solar-chimney in a single story building so that the resident might benefit from natural ventilation, a passive cooling system, and heating strategies; it would also help to decrease energy use, CO2 emissions, and pollution. This system is able to remove undesirable interior heat pollution from a building and provide thermal comfort for the occupant. The present study introduces the use of a solar-chimney with an underground air channel combined with a wind-catcher, all as part of one device. Both the wind-catcher and solar chimney concepts used for improving a room’s natural ventilation are individually and analytically studied. This paper shows that the solar-chimney can be completely used to control and improve the underground cooling system during the day without any electricity. -
Apple Blossom Times
Town of Newfane Historical Society’s Apple Blossom Times Since 1975 Summer 2021 rental info., date Inside This Issue Summertime’s in the air availability and President’s Letter From the desk of our President more. Minute History Hello friends- We have made it through winter and now If you are reading this, we head full speed into warmer days, thank goodness! May 16: Drive-Thru dear member, know that all of us at the Chowder Fundraiser With uncertainty still in the air concerning the Newfane Historical pandemic, we are moving our 44th Apple Blossom Member Update Society appreciate Festival to 2022. We won’t leave you hanging, however, your support, and Summer Fun Fact as we are doing a drive-thru chowder fundraiser on anxiously await for May 16. It is a first-come, first-serve basis, so don’t History of the Electric Fan the days when we’ll miss out! Art Gladow’s famous chicken chowder all come together WNY Native Etymologies has always been a staple of our apple festivals, and again to celebrate is the first food to sell out annually. So swing by that Support our Historial Society local history in person. As I sign off, I will leave you Sunday for some chowder and to say hello to some of our with this, to put a smile on your face. Recipe Rewind hardworking trustees and volunteers! What do ghosts like to eat in the summer? Calendar With warmer weather upon us, I’d also like to I Scream. remind everyone that the Van Horn Mansion and Country Village are available for private rentals. -
Position Document on Resiliency in the Built Environment
ASHRAE and CIBSE Position Document on Resiliency in the Built Environment Approved by ASHRAE Board of Directors June 26, 2019 Approved by the CIBSE Board July 11, 2019 Expires June 26, 2022 © 2019 ASHRAE and CIBSE ASHRAE • 1791 Tullie Circle, NE • Atlanta, Georgia 30329-2305 • 404-636-8400 • www.ashrae.org CIBSE • 222, Balham High Road • London SW12 9BS • 0208 675 5211 • www.cibse.org © 2019 ASHRAE and CIBSE. For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without copyright holders' prior written permission. COMMITTEE ROSTER The ASHRAE and CIBSE Position Document on Resiliency in the Built Environment was developed by ASHRAE’s Resiliency in the Built Environment Position Document Committee formed on October 10, 2017, with David Under- wood as its chair. David Underwood Andrew Persily Retired NIST Oakville, ON, Canada Gaithersburg, MD, USA Scott Campbell Thomas Phoenix National Ready Mixed Concrete Association Clark Patterson Lee Milwaukee, WI, USA Greensboro, NC, USA Hywel Davies CIBSE Paul Torcellini London, United Kingdom Eastford, CT, USA Bill McQuade Chandra Sekhar AHRI National University of Singapore Arlington, VA, USA Singapore, Singapore The CIBSE Technology Committee was responsible for oversight of the CIBSE contribution to this position docu- ment. Cognizant Committees The chairperson of ASHRAE Technical Committee 2.10, Resilience and Security, also served as an ex-officio member: Jason DeGraw Arvada, CO, USA ASHRAE is a registered trademark in the U.S. Patent and Trademark Office, owned by the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. © 2019 ASHRAE and CIBSE. For personal use only. -
Solar Heating and Cooling & Solar Air-Conditioning Position Paper
Task 53 New Generation Solar Cooling & Heating Systems (PV or solar thermally driven systems) Solar Heating and Cooling & Solar Air-Conditioning Position Paper November 2018 Contents Executive Summary ............................................................. 3 Introduction and Relevance ................................................ 4 Status of the Technology/Industry ...................................... 5 Technical maturity and basic successful rules for design .............. 7 Energy performance for PV and Solar thermally driven systems ... 8 Economic viability and environmental benefits .............................. 9 Market status .................................................................................... 9 Potential ............................................................................. 10 Technical potential ......................................................................... 10 Costs and economics ..................................................................... 11 Market opportunities ...................................................................... 12 Current Barriers ................................................................. 12 Actions Needed .................................................................. 13 This document was prepared by Daniel Neyer1,2 and Daniel Mugnier3 with support by Alexander Thür2, Roberto Fedrizzi4 and Pedro G. Vicente Quiles5. 1 daniel neyer brainworks, Oberradin 50, 6700 Bludenz, Austria 2 University of Innsbruck, Technikerstr. 13, 6020 Innsbruck, Austria -
Ammonia As a Refrigerant
1791 Tullie Circle, NE. Atlanta, Georgia 30329-2305, USA www.ashrae.org ASHRAE Position Document on Ammonia as a Refrigerant Approved by ASHRAE Board of Directors February 1, 2017 Expires February 1, 2020 ASHRAE S H A P I N G T O M O R R O W ’ S B U I L T E N V I R O N M E N T T O D A Y © 2017 ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE’s prior written permission. COMMITTEE ROSTER The ASHRAE Position Document on “Ammonia as a Refrigerant” was developed by the Society’s Refrigeration Committee. Position Document Committee formed on January 8, 2016 with Dave Rule as its chair. Dave Rule, Chair Georgi Kazachki IIAR Dayton Phoenix Group Alexandria, VA, USA Dayton, OH, USA Ray Cole Richard Royal Axiom Engineers, Inc. Walmart Monterey, CA, USA Bentonville, Arkansas, USA Dan Dettmers Greg Scrivener IRC, University of Wisconsin Cold Dynamics Madison, WI, USA Meadow Lake, SK, Canada Derek Hamilton Azane Inc. San Francisco, CA, USA Other contributors: M. Kent Anderson Caleb Nelson Consultant Azane, Inc. Bethesda, MD, USA Missoula, MT, USA Cognizant Committees The chairperson of Refrigerant Committee also served as ex-officio members: Karim Amrane REF Committee AHRI Bethesda, MD, USA i © 2017 ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE’s prior written permission. HISTORY of REVISION / REAFFIRMATION / WITHDRAWAL -
Overview of Chiller Compressors
Overview of Chiller Compressors Course No: M04-027 Credit: 4 PDH A. Bhatia Continuing Education and Development, Inc. 22 Stonewall Court Woodcliff Lake, NJ 07677 P: (877) 322-5800 [email protected] OVERVIEW OF CHILLER COMPRESSORS Overview In HVAC industry, the refrigeration machine that produces chilled water is referred to as a “Chiller”. A chiller package operates either on the principles of vapor compression or vapor absorption. The vapor compression system uses mechanical energy in the form of electric motor to drive the cooling cycle whereas absorption chillers use heat to drive the process. The vapor compression chiller system, which is far more prominent in commercial buildings, consists of four major components: the compressor, evaporator, condenser and expansion device all packaged as a single unit. The classification of vapor compression chiller packages is generally by the type of compressor: centrifugal, reciprocating, and screw being the major ones. Chillers are the largest consumer of energy in a commercial building and it is therefore important to understand the relative benefits and limitations of various types in order to make the right economic decisions in chiller installation and operation. This course will talk about the type of compressor used in the water cooled chiller. The course is divided into 3 parts: Part - I: Types of Chiller Compressors Part – II: Comparison of Chiller Compressors Part –III: Economic Evaluation of Chiller Systems PART I - TYPES OF CHILLER COMPRESSORS Most cooling systems, from residential air conditioners to large commercial and industrial chillers, employ the refrigeration process known as the vapor compression cycle. At the heart of the vapor compression cycle is the mechanical compressor. -
ASHRAE Position Document on Filtration and Air Cleaning
ASHRAE Position Document on Filtration and Air Cleaning Approved by ASHRAE Board of Directors January 29, 2015 Reaffirmed by Technology Council January 13, 2018 Expires January 23, 2021 ASHRAE 1791 Tullie Circle, NE • Atlanta, Georgia 30329-2305 404-636-8400 • fax: 404-321-5478 • www.ashrae.org © 2015 ASHRAE (www.ashrae.org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission. COMMITTEE ROSTER The ASHRAE Position Document on Filtration and Air Cleaning was developed by the Society's Filtration and Air Cleaning Position Document Committee formed on January 6, 2012, with Pawel Wargocki as its chair. Pawel Wargocki, Chair Dean A. Saputa Technical University of Denmark UV Resources Kongens Lyngby, Denmark Santa Clarita, CA Thomas H. Kuehn William J. Fisk University of Minnesota Lawrence Berkeley National Laboratory Minneapolis, MN Berkeley, CA H.E. Barney Burroughs Jeffrey A. Siegel Building Wellness Consultancy, Inc. The University of Toronto Johns Creek, GA Toronto, ON, Canada Christopher O. Muller Mark C. Jackson Purafil Inc. The University of Texas at Austin Doraville, GA Austin, TX Ernest A. Conrad Alan Veeck BOMA International National Air Filtration Association Washington DC Virginia Beach, VA Other contributors: Dean Tompkins Madison, WI for his contribution on photocatalytic oxidizers Paul Francisco, Ex-Officio Cognizant Committee Chair Environmental Health Committee University of Illinois Champaign, IL ASHRAE is a registered trademark in the U.S. Patent and Trademark Office, owned by the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. © 2015 ASHRAE (www.ashrae.org). For personal use only. -
(Vocs) in Asian and North American Pollution Plumes During INTEX-B: Identification of Specific Chinese Air Mass Tracers
Atmos. Chem. Phys., 9, 5371–5388, 2009 www.atmos-chem-phys.net/9/5371/2009/ Atmospheric © Author(s) 2009. This work is distributed under Chemistry the Creative Commons Attribution 3.0 License. and Physics Characterization of volatile organic compounds (VOCs) in Asian and north American pollution plumes during INTEX-B: identification of specific Chinese air mass tracers B. Barletta1, S. Meinardi1, I. J. Simpson1, E. L. Atlas2, A. J. Beyersdorf3, A. K. Baker4, N. J. Blake1, M. Yang1, J. R. Midyett1, B. J. Novak1, R. J. McKeachie1, H. E. Fuelberg5, G. W. Sachse3, M. A. Avery3, T. Campos6, A. J. Weinheimer6, F. S. Rowland1, and D. R. Blake1 1University of California, Irvine, 531 Rowland Hall, Irvine 92697 CA, USA 2University of Miami, RSMAS/MAC, 4600 Rickenbacker Causeway, Miami, 33149 FL, USA 3NASA Langley Research Center, Hampton, 23681 VA, USA 4Max Plank Institute, Atmospheric Chemistry Dept., Johannes-Joachim-Becherweg 27, 55128 Mainz, Germany 5Florida State University, Department of Meteorology, Tallahassee Florida 32306-4520, USA 6NCAR, 1850 Table Mesa Drive, Boulder, 80305 CO, USA Received: 9 March 2009 – Published in Atmos. Chem. Phys. Discuss.: 24 March 2009 Revised: 16 June 2009 – Accepted: 17 June 2009 – Published: 30 July 2009 Abstract. We present results from the Intercontinental 1 Introduction Chemical Transport Experiment – Phase B (INTEX-B) air- craft mission conducted in spring 2006. By analyzing the The Intercontinental Chemical Transport Experiment – mixing ratios of volatile organic compounds (VOCs) mea- Phase B (INTEX-B) aircraft experiment was conducted in sured during the second part of the field campaign, to- the spring of 2006. Its broad objective was to understand gether with kinematic back trajectories, we were able to the behavior of trace gases and aerosols on transcontinental identify five plumes originating from China, four plumes and intercontinental scales, and their impact on air quality from other Asian regions, and three plumes from the United and climate (an overview of the INTEX-B campaign can be States. -
Air Conditioning and Refrigeration Systems
AAS (60 SCH*) ® Air Conditioning *Semester Credit Hour 8/2020 First Semester - 15 SCH Second Semester - 15 SCH COSC 1301 - Introduction to Computing HART 1341 - Residential Air Conditioning HART 1301 - Basic Electricity for HVAC HART 1345 - Gas and Electric Heating HART 1307 - Refrigeration Principles HART 2341 - Commercial Air Conditioning HART 1310 - HVAC Shop Practices and Tools HART 2349 - Heat Pumps PSYC 1300 - Learning Framework SPCH 1321 - Business & Professional Communication Third Semester - 15 SCH Fourth Semester - 15 SCH HART 2331 - Advanced Electricity for HVAC HART 2334 - Advanced Air Conditioning Controls HART 2336 - Air Conditioning Troubleshooting HART 2343 - Industrial Air Conditioning HART 2338 - Air Conditioning Installation & Startup HART 1356 - EPA Recovery Certification Preparation HART 2345 - Residential Air Conditioning Systems Design MATH 1332 - Contemporary Mathematics ENGL 1301 - Composition I DRAM 1310 - Introduction to Theater Marketable Skills Program Outcomes Math Skills; manage time and materials; acquire and evaluate • Install, troubleshoot and repair refrigerators, freezers, and information; interpret and communicate information; oral and window air conditioners. written communications skills; computer skills; teamwork; cultural • Install, troubleshoot and repair split or package residential diversity; apply technology to work; creative thinking; decision air conditioning systems, including electric furnaces, gas making; problem solving; self-management; construction and furnaces and heat pumps. industrial -
Investigating Absorption Refrigerator Fires (Part I)
Orion P. Keifer Peter D. Layson Charles A. Wensley Investigating Absorption Refrigerator Fires (Part I) ATLANTIC BEACH, FLORIDA—In today’s recreational vehicles (RV), the then expels it when perco- most common refrigerator uses absorption refrigeration technology, lated in the boiler. It is this primarily because this type of system can operate on multiple sources action of the water which of power, including propane when electrical power is unavailable. makes the ammonia flow. These refrigerators have been under intense scrutiny in recent years The hydrogen in the re- due to numerous reported fires, apparently starting in the area of the frigeration coil maintains absorption refrigerator. Both the Dometic Corporation and Norcold a positive pressure of ap- Incorporated, two manufacturers of RV refrigerators, have been re- proximately 300-375 PSI quired by the National Highway and Traffic Safety Administration (2.07-2.59 MPa) when (NHTSA) to recall certain models of refrigerators which have been not in operation and, due identified as capable of failing in a fire mode. In summary, the three to its low partial pressure, NHTSA recalls indicate a fatigue crack may develop in the boiler tube promotes the evaporation of the cooling unit which may release sufficient pressurized flammable of the liquid ammonia. It coolant solution into an area where an ignition source is present. The should be noted that unlike NHTSA Recall Campaign ID Numbers are 06E076000 for Dometic conventional refrigeration (926,877 affected units), and 02E019000 (28,144 affected units) and systems which extensively 02E045000 (8,419 affected units) for Norcold. use copper due to its high thermal conductivity, the Applications Engineering Group, Inc. -
Rental Cooling Guide for Tents & Shelters
Rental Cooling Guide For Tents & Shelters Taking you a step closer to cool Let’s get down to business. You’ve got a hot spot and you need cooling. It’s not everyday you need to purchase air conditioning. How do you fig- ure out how much cooling you need? Where do you turn for help? This cooling load calculator will be your guide to help you determine what kind of cooling you need and how much cooling you need. We outline the questions you need to answer before you make the call to get some extra cooling. Know what you need and you’ll be a more knowledgeable pros- pect, certain to make a more informed buying decision. Determining Your Cooling Load is a simple three step process. Apply the basic rule of thumb for tent cooling — one ton of cooling, 12,000 BTU, for every 100 s.f. to 150 s.f. This method will give you a cooling range for the size tent you select. For example: a 60’ x 80’ tent is 4800 s.f. Divide the total s.f. by 150 and you will have the low end: 4800 / 150 = 32 tons. Divide the total s.f. by 100 and you will have the high end: 4800 / 100 = 48 tons. For a 60’ x 80’ tent you will need between 32 and 48 tons of cooling. AirPac Rents Your online source for portable air conditioner rentals 888-324-7722 www.AirPacRents.com Copyright © 2005 AirPac Rents, Incorporated. All rights reserved. 1 The amount of cooling you select will depend on the event itself.