For more in-depth information on temperature and humidity control in the data center, please read "Explore hot and cold aisle containment for your data center.". Chapter 10. The Climate Resiliency Design Guidelines assists in integrating historic and predicted climate change data into the project planning process. Chapter 3. In each case, ASHRAE provides guidance for both the relative humidity -- the amount of moisture in the air -- and the dew point or temperature at which water vapor turns to liquid, assuming a constant air pressure is maintained. The Society and its members focus on building systems, energy efficiency, indoor air quality, refrigeration and sustainability within the industry. Control Systems Library (I-P), 49.0 PDHsThis Library is comprised of 2 Course Packages: HVAC Control Systems, and DDC Controls. Air-to-Air Energy Recovery EquipmentAir-to-air energy recovery is the process of recovering heat or/and moisture between two airstreams at different temperatures and humidities. District Heating and CoolingDistrict heating and cooling (DHC) or district energy (DE) distributes thermal energy from a central source to residential, commercial, and/or industrial consumers for use in space heating, cooling, water heating, and/or process heating. Chapter 19. HVAC Design Training: Level I - Essentials (I-P), 18.0 PDHsThis intensive, practical training provides a detailed understanding of HVAC fundamentals, equipment and systems. As was the case for air temperature, ASHRAE provides both recommended and allowable metrics for data center humidity. Liquid Overfeed SystemsOverfeed systems force liquid in excess of the amount evaporated, either mechanically or by gas pressure, through organized-flow evaporators, separate it from the vapor, and return it to the evaporators. Codes and StandardsThis chapter lists important codes and standards from a broad spectrum of engineering societies, and provides contact information for the issuing organizations. PTACs are designed primarily for commercial installations to provide the total heating and cooling functions for a room or zone and are specifically for through-the-wall installation. Centrifugal PumpsCentrifugal pumps provide the primary force to distribute and recirculate hot and chilled water in a variety of space-conditioning and plumbing systems. Chapter 7. Most examples, references, and capacity data in this chapter refer to the more common refrigerants. Chapter 28. A thermostat monitors the air temperature and adjusts the cooling system accordingly. It does not address criteria such as allowable moisture content, refrigerant quantity, and performance, which are specific to each machine. Duct Size Calculator (I-P and SI)The Duct Size Calculator is intended for use as a quick reference tool for approximating duct sizes and equivalent sizes of sheet metal duct versus flexible duct. If the humidity is too high, condensation can occur, potentially shortening the life of various components. This article discusses air delivery systems, including overhead well-mixed systems, underfloor partially stratified systems, and displacement fully stratified systems. >> Contact us at edu@ashrae.org with any questions. Multiple Zone Air Systems (SI), 2.0 PDHsThis course introduces systems to deal with situations where the instantaneous load varies from zone to zone. DDC Controls (I-P), 10.0 PDHsThis course package is comprised of 3 individual courses: DDC Networks and Protocols; DDC Specification, Installation, and Commissioning; and DDC Introduction to Hardware and Software. This chapter covers thermodynamics applied to refrigeration cycles, methods for calculating thermodynamic properties, and compression and absorption refrigeration cycles. The relative humidity level ranges from 8% to 80% for Class A1 and from 8% to 90% for Class A4. [ . Attributes that distinguish VRF from other DX system types are multiple indoor units connected to a common outdoor unit (single or combined modules), scalability, variable capacity, distributed control, and simultaneous heating and cooling. Refrigerant Control DevicesControl of refrigerant flow, temperatures, pressures, and liquid levels is essential in any refrigeration system. For example, according to ASHRAE's guidance, the allowable temperature is from 15 to 32 degrees C (59 to 89.6 degrees F) to 5 to 45 degrees C (41 to 113 degrees F). Standard 62.1: Ventilation for Acceptable Air Quality (I-P), 10.1 PDHsThis course package is comprised of 5 individual courses: Standard 62.1-2007: Natural Ventilation and Exhaust; Standard 62.1-2013: Natural Ventilation Procedure; Standard 62.1-2010 Ventilation Rate Procedure; Standard 62.1-2007: Recirculating and Treating Indoor Air; and Standard 62.1-2007: Moisture and Mold Control. Units are inherently self-adjusting in the sense that heat output is based on temperature differentials; cold spaces receive more heat and warmer spaces receive less heat. Ideally, sensors should detect high levels of humidity and divert air flow so that humidity levels remain within the acceptable range. This chapter discusses design considerations for components, system performance requirements, and applications for secondary coolants. Fundamentals of Psychrometrics (I-P & SI), 20.0 PDHsThis course provides an understanding of the basic concepts of psychrometrics including moist air properties, evaporation, enthalpy, and temperature change, plus the basic HVAC processes. In the 2022 edition of Air Movement and Control Associations award-winning magazine: Q&A with AMCAs new executive director and 2022-2023 president; your questions about life-safety dampers answered; reducing climate-change-induced heat strain and HVAC performance loss; remote fan monitoring; application of wind-driven-rain-resistant louvers. This article discusses essential requirements (in standards, guidelines and rating systems) that cover thermal comfort, acoustics and ventilation, and what's involved in properly applying them to the typical main delivery systems. Chapter 14. Fundamentals of Refrigeration (I-P & SI), 35.0 PDHsThis course provides an understanding of the field of refrigeration, including the three main areas: comfort cooling or air conditioning; commercial refrigeration; and industrial refrigeration. Fundamentals of Heating Systems (I-P), 35.0 PDHsThis course provides an understanding of the various types of heating systems available for commercial and residential buildings and the three basic components of every heating system: the fuel source; the energy conversion plant; and the energy distribution system. Chapter 24. Commissioning Process in New and Existing Buildings (I-P), 6.0 PDHsThis introductory course focuses on how the building commissioning process can be applied cost-effectively to new construction and to existing facilities, with a strong emphasis on existing facilities applications. But users must know when to use one over the other. A unitary air conditioner or heat pump with more than one factory-made assembly (e.g., indoor and outdoor units) is commonly called a split system. Nonresidential Cooling and Heating Load CalculationsThis chapter discusses common elements of cooling load calculation (e.g., internal heat gain, ventilation and infiltration, moisture migration, fenestration heat gain) and two methods of heating and cooling load estimation: heat balance (HB) and radiant time series (RTS). Temperature regulation works similarly to any other climate-controlled environment. The ASHRAE HVAC Design Training provided me with the information needed in order to carry out my position responsibilities more effectively. Unit Ventilators, Unit Heaters, and Makeup Air UnitsThis chapter discusses unit ventilators, unit heaters, and makeup air units and how they are deployed in HVAC systems. We oversee the FGI Guidelines for Design and Construction revision process and publication, fund research, and offer resources that support the development of safe, effective health and residential care built environments. The compressor circulates refrigerant through the system and increases refrigerant vapor pressure to create the pressure differential between the condenser and evaporator. Ice making is an essential secondary function in some markets. ASHRAE Resources Available to Address COVID-19 Concerns. Privacy Policy A related product, the wine chiller, provides optimum temperatures for storing wine, at temperatures from 45 to 65F (7 to 18C). The total coil surface may consist of a single coil section or several coil sections assembled into a bank. Chapter 36. Covers design basics. Halocarbon refrigerants are classified into four groups: chlorofluorocarbons (CFCs), which contain carbon, chlorine, and fluorine; hydrochlorofluorocarbons (HCFCs), which consist of carbon, hydrogen, chlorine, and fluorine; hydrofluorocarbons (HFCs), which contain carbon, hydrogen, and fluorine; and hydrofluoroolefins (HFOs), which are HFC refrigerants derived from an alkene (olefin; i.e., an unsaturated compound having at least one carbon-to-carbon double bond). The choice between the various methods of heating depends greatly on the cost of the various available energy sources. Safety classifications based on toxicity and flammability data are included along with refrigerant concentration limits for the refrigerants. It covers (1) control fundamentals, including terminology; (2) types of control components; (3) methods of connecting components to form various individual control loops, subsystems, or networks; and (4) commissioning and operation. Chapter 15. Chapter 41. Heat TransferThis chapter presents elementary principles of single-phase heat transfer, with emphasis on HVAC applications. This chapter describes the design features of several categories of commercially available refrigerant compressors. Mission: To serve humanity by advancing the arts and sciences of heating, ventilation, air conditioning, refrigeration and their allied fields.Vision: A healthy and sustainable built environment for all. ASHRAE Guideline 28-2016 -- Air Quality within Commercial Aircraft >> Purchase print of PDF. Fundamentals of HVAC Systems (SI)The Fundamentals of HVAC Systems is a thorough introduction on how HVAC systems control temperature, air quality, and air circulation in a conditioned space. This chapter describes a variety of devices and their application to accomplish these important control functions. HVAC Design Training: Level II - Applications (I-P), 12.0 PDHsThis training provides instruction in HVAC system design for experienced HVAC engineers and those who have completed HVAC Design: Level I Essentials. The following glossary was compiled from a variety of sources throughout the industry, including ASHRAE, the International Institute of Ammonia Refrigeration (IIAR), the U.S. Occupational Safety and Health Administration (OSHA), and the U.S. Environmental Protection Agency (EPA). Shaping Tomorrow's Built Environment Today, Members-Only Free Access to Archived ASHRAE Journal Articles, Officers, Directors, Councils, Committees, Staff, Science and Technology for the Built Environment, Instructor-Led Training Seminar and Short Courses, Self-Directed Learning / Group Learning Texts, Criteria for Annual Conference City Selection.
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