News feed - Page 10 of 12 - HVAC/R & Solar

Fans: The First Line Of Cooling

Commissioning, HVAC

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

Commissioning, HVAC

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

Commissioning, HVAC

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

Commissioning, HVAC

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

Commissioning, HVAC

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:

Commissioning, HVAC

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.

Commissioning, Equipments

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

Commissioning

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,

Commissioning, Control, Equipments

FREQUENTLY ASKED QUESTIONS about PICV valves. Also there is another article about how PICV works and it’s advantages in this link.

Commissioning, Control, Piping

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.

Commissioning

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.

Solar

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

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.

HVAC, Refrigeration

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.

Piping

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.

Calculator, HVAC, Piping

Saturated Water and Steam properties (Temperature-based) calculator and table

HVAC, Softwares

A comprehensive online database of thermophysical properties of materials. Including Thermal conductivity, Thermal diffusivity, Specific heat capacity, Thermal effusivity and Material density.

HVAC

It is likely, but not yet shown, that COVID19 could be spread through the air.
Air cleaning can help mitigate disease transmission.
Options for air cleaning include:
HVAC systems
In-Room devices
Technologies that can be effective include:
Mechanical Air Filters
Electronic Air Filters/Air Cleaners
UV-C Systems
Other Emerging Technologies

HVAC

A brief history of HVAC (Heating, ventilation, and air conditioning)

Refrigeration

The thermodynamic processes in the refrigeration cycle are complex. Calculation using formulae and tables requires a considerable amount of effort due to the three different states of the refrigerant from liquid, boiling and gaseous. Therefore, for reasons of simplify cation, the log p-h diagram was introduced.

HVAC, Softwares

Series of training videos and articles are designed to help users get-started and with fundamental tasks such as installation, setting preferences, utilizing the HAP building wizards and more

Refrigeration

The idea of using a refrigerant diagram is that it makes it possible to represent the processes in the refrigeration system in such a way that analysis and evaluation of the process becomes easy.

Commissioning, Piping

Closed-loop systems can be further classified as direct return or reverse return. The direct return system allows piping to be run in the most direct path to optimize piping costs. The reverse return system is piped so that the length of the water circuit through the supply and return piping to each fan coil or air handler is essentially the same.

Commissioning, Equipments, HVAC, Piping

There are four main types of water distribution systems. They are defined by the number of pipes used in the system – 1-pipe, 2-pipe, 3-pipe, and 4-pipe. While this article will discuss primarily chilled water and condenser water system piping system design, it is important to understand the evolution from 1-pipe into the other three systems, all of which are used for heating as well as cooling.

Commissioning, HVAC, Piping

Understanding of the three basic types of piping systems: closed-loop, open-loop, and once-thru. Closed-Loop (Evaporator), Open-Loop (Condenser), Once-Thru.

Calculator, Commissioning, Equipments, HVAC

Gauge (or gage) sizes are numbers that indicate the thickness of a piece of sheet metal, with a higher number referring to a thinner sheet. The Calculator below can be used to determine the equivalent sheet thickness, in inches or millimeters, for a gauge number from the selected gauge size standard.

Control, HVAC, Refrigeration

A heat rejection system can take several forms. The most efficient is the evaporative cooling tower which uses the cooling effect of evaporating water to boost the cooling provided by fresh air.

Equipments, HVAC

Heating Load Factors for HVAC desgn. Safety Factors, Heating Load Credits, Heating System Selection Guidelines and ASHRAE Standard 90.1.

Equipments, HVAC

Diversity factors are an engineer’s judgement applied to various people, lighting, equipment, and total loads to consider actual usage.

Equipments, HVAC

Fuel Conversion Factors for Electric Baseboard to Hydronic Baseboard, Electric Furnace to Hydronic Baseboard, Ceiling Cable to Hydronic Baseboard, Heat Pump to Hydronic Baseboard, Electric Baseboard to Warm Air Furnace, Electric Furnace to Fuel-Fired Furnace, Ceiling Cable to Warm Air Furnace, Heat Pump to Warm Air Furnace, Warm Air Systems to Hydronic Baseboard System.

Fans: The First Line Of Cooling

Commissioning, HVAC

Air Conditioner Repaires And Maintenance

Commissioning, HVAC

Balanced Ventilation

Commissioning, HVAC

Electric Heating Systems

Commissioning, HVAC

Boiler Repair And Maintenance

Commissioning, HVAC

Air Conditioning

Commissioning, HVAC

Dehumidifiers

Commissioning, Equipments

Heater And Heater Systems

PICV Valves Questions and Answers

Commissioning, Control, Equipments

Pressure Independent Control Valves (PICV)

Commissioning, Control, Piping

Furnace Repair

Flat Plate Collectors

Solar Collectors Technologies

Fundamental Of The Psychrometric Chart

HVAC, Refrigeration

Friction Loss For Hvac Piping

Saturated Water And Steam (Temperature-Based) Calculator And Table

Calculator, HVAC, Piping

Materials Thermal Properties Database

HVAC, Softwares

Hvac Coronavirus Confrontation

Hvac History

Refrigeration Cycle Diagram Explained

Carrier Hap Training Videos And Articles

HVAC, Softwares

Refrigerant Diagrams

Direct And Reverse Return Systems

Commissioning, Piping

Water Distribution Systems

Commissioning, Equipments, HVAC, Piping

Types Of Piping Systems

Commissioning, HVAC, Piping

Sheet Metal Gauge Calculator

Calculator, Commissioning, Equipments, HVAC

Heat Rejection Techniques

Control, HVAC, Refrigeration

Heating Load Factors

Equipments, HVAC

Cooling Load Factors

Equipments, HVAC

Fuel Conversion Factors

Equipments, HVAC