Data, Tables, Tools, Guides
Pressure relief devices (PRD’s) are widely and effectively used to protect process equipment such as piping systems, pressure vessels, distillation columns and other equipment from pressures exceeding the design-pressure rating by more than a fixed predetermined amount. The aim of pressure relief valves is to prevent damage to equipment, prevent injury to personnel and to avoid potential risks to the environment.
Why do we need to be aware of the valve characteristics?
Every component in a hydronic system has some level of influence on the control and performance of a hydronic system. Valves are key because they are the controlling devices at the critical areas of heat transfer.
The HVAC/R (heating, ventilating, and air conditioning / refrigeration) industry is rapidly changing due to advancements in technology being spurred on by the need for increased energy efficiencies.
Accordingly, the career opportunities open to an individual seeking employment in HVAC fields can be divided roughly into four categories, each dependent upon a different type or degree of education and/or training.
#Xylem Bell & Gosset #Selection, #Sizing & #CAD Tools and #Softwares
commissioning process – a quality oriented process for achieving, verifying, and documenting that the performance of facilities, systems, and assemblies meets the defined objectives and criteria.
These details will show all of the required ductwork and piping connections, as well as support requirements and miscellaneous appurtenances such as thermometers, pressure gauges, and flexible pipe connectors.
Balancing air systems (ductwork) may be accomplished in various ways. The most common method to accomplish ductwork balancing is Proportional Method. Each diffuser is adjusted to supply the right percentage of total air volume in the ductwork.
The book is meant for juniors, seniors, and first-year graduate students. And to those who choose to learn the subject on their own, and to practicing engineers who use it as a reference. Whether one studies alone or with a class, learning means posing, then answering, one’s own questions.
the expansion valve is used to control the flow of refrigerant from the high-pressure condensing side of the system into the low-pressure evaporator. In most cases, the pressure reduction is achieved through a variable flow orifice, either modulating or two-position. Expansion valves may be classified according to the method of control.
McQuay (As part of Daikin Industries) is one of the largest air conditioning, heating, ventilating and refrigeration companies in the HVAC/R industry. Therefore, we decided to make some softwares that this company has introduced to the industry based on their experience and knowledge available for download.
Modern furnaces, especially high efficiency models, are more complicated than models from decades ago. The efficiency gains are due in large part to the careful balancing of fuel, combustion air, and exhaust gasses. Furnace Maitenance And Repairs. Furance And Homeowners Inspection. The Dangers Of CO. Preventing CO In Your Home. Furnace Filters.
#Furnace #FurnaceMaitenance #FurnaceInspection #heatingsystems
Fans, Just as with windchill in the winter, moving air will quickly reduce our skin temperature, especially when the evaporation of perspiration is included. Even homes that use air conditioning can benefit from the use of fans. Cooling our bodies with a fan means we can turn up the temperature for the air conditioner, and save energy overall. Different type of fans: Portable Fans, Box Or Window Fans, Ceiling Fans, Whole-House Fans, Attic Fans.
#fans #Portablefans #box
fans #CeilingFans #WholeHouseFans #AtticFans #Destratification
A central air system uses the same ductwork, fan, and controls as the forced-air furnace, so some of the maintenance requirements are the same. Test, adjust and balancing.
#hvac #TAB
Air Exchangers exchange stale indoor air with fresh air from the outside. Heat recovery ventilation (HRV) is a system that exhausts air from inside of a home and replaces it with outdoor air. Energy recovery ventilation (ERV) is a system that does everything that an HRV does with the addition of transferring moisture from the exhausted air into the air entering the home and restricting moisture from incoming air. Maintenance of Ventilation Systems
is any process in which electrical energy is converted to heat, including resistance and radiant electric systems. Electric Heating Systems are: Baseboard Convectors, Electric Furnaces, Electric Plenum Heaters, Radiant Electric Heating. Electric Heating Repairs and Maintenance
Boiler Repair and Maintenance, Boilers should be inspected on an annual basis and adjusted as needed to meet the manufacturer’s specifications in order to maintain both efficiency and safety. The following items are services that a qualified service technician should do:
Air conditioning operates on the same principles as a refrigerator. All air conditioners consist of a condenser unit, which sits outside the house and serves to condense the circulating refrigerant, thus releasing the captured heat to the outside. The actual equipment that accomplishes the “conditioning” of indoor air comes in several forms, depending on the type of distribution system in the home.
Dehumidifiers have a bucket or pan that can be periodically emptied. Most have an automatic shut-off when the container is full. Relative humidity (RH) is the amount of water vapor actually present in the air compared to the greatest amount of water vapor the air can hold at that temperature. Many dehumidifiers include a built-in humidistat
Boilers are the second most common method of heating homes. Many hot water boiler systems can also provide domestic hot water for bathing, washing, etc. along with heating the house. Boiler Function in different systems: Hot Water Radiator, Hot Water Baseboard, In-Floor Hot Water, Hydronic Air Handlers,
FREQUENTLY ASKED QUESTIONS about PICV valves. Also there is another article about how PICV works and it’s advantages in this link.
Pressure Independent Control Valves (PICV) can help reduce energy costs and increase occupant comfort in heating and cooling coil applications in buildings. A PICV is best described as two valves in one: a standard 2-way control valve and a balancing valve.
Modern furnaces—especially high efficiency models—are more complicated than models from decades ago. The efficiency gains are due in large part to the careful balancing of fuel, combustion air, and exhaust gasses.
The FPC (Flat-Plate Collectors) is the heart of any solar energy collection system designed for operation in the low-temperature range (less than 60°C) or in the medium temperature range (less than 100°C).
Solar energy is the primary light and heat resource of the Earth. It can provide eternal energy to maintain the atmosphere temperature and germinate plants. With technological developments, solar energy can be utilized more and more efficiently and economically.
Psychrometry is the science dealing with the physical laws of air – water mixtures.
When designing an air conditioning system, the temperature and moisture content of the air to be conditioned, and the same properties of the air needed to produce the desired air conditioning effect, must be known. Once these properties are known, the air conditioning task can be determined. This analysis can be performed using the psychrometric chart. The psychrometric chart graphically displays several physical properties of air over a broad range of conditions. Knowing the relationship of these air properties aids the task of air conditioning system design and analysis.
Using the following diagrams, you can calculate the size or coefficient of friction by having the amount of water flow.
This diagram is one of the most useful diagrams used by engineers and technicians and is taken from Carrier book.
Saturated Water and Steam properties (Temperature-based) calculator and table