One of the most important applications of Pressure Transducers, apart from the medical field, are also HVAC/HVACR systems. HVACR is an acronym, which stands for heating, ventilation, air-conditioning and refrigeration systems. In general it describes a collection of systems used to circulate air between the ouside and the inside areas of residential, commercial and industrial premises. That enables air-conditioning, ensuring the adequate temperature, humidity, air quality and air-exchange, usually measured in cubic-feet-per-minute CFM, according to the requirements of a particular environment.
HVACR systems have an important role in the sense of energy consumption and sustainability since buildings consume about 40 percent of all energy worldwide and HVACR systems take about 40 percent of a building consumption in average. Therefore, it is important to design energy-efficient and optimized HVACR systems, that enable the same amount of comfort to people, while keeping highly efficient energy consumption.
HVACR Systems provide comfort, ensure adequate environmental conditions and energy efficiency!
A typical HVACR system basically consists of the following units:
- Heating units – warm the environment
- Air-conditioning units – cool the environment and ensure the adequate humidity
- Ventilation systems – clean the air
- Refrigirators – keep the air in particular environments cold enough to preserve e.g. food, medicines etc.
The operation of the most HVACR systems is based on the principles of fluid mechanics, thermodynamics and heat transfer.
The pressure sensors are a central element for controlling HVACR systems.
They are performing:
- Air filter monitoring
- Volumetric flow measurement
- Volume heating system monitoring
- Duct pressure level maintenance
- Room pressure monitoring
- Control of air handling unit
- Control of fan power
- Clean room ventilation
- Urban farming
Industrial HVAC systems are based on the principle, that warm air is sucked from a building and flows over cooling coils which absorb the heat through the liquid refrigerant that is circulating through the coils. The incoming air is blown into the building, after being cooled and dehumidified. Refrigerant collects the heat from the incoming air, evaporates and passes it through a compressor, located outside of a building. The compressor then compresses the gas to a higher pressure and a higher temperature. Hot, pressurized air then flows over the condenser that converts the gas into the liquid form since the heat is released into the environment.
HYB Pressure Sensors Features
- Ultra low pressure ranges: 1mbar to 10bar
- High sensitivity
- High pressure accuracy
- Outstanding offset stability
- Excellent repeatability
- Fast response time
- Analog or digital output
- Support for all major microcontrollers
- Low power consumption
- Possible WET/WET applications
Industrial HVAC Equipment
A large-scale HVAC system, like those often found in commercial buildings, may include the following equipment:
- Chillers: Chillers cool the water that is distributed through the unit’s cooling coils.
- Rooftop Units: Rooftop units are mounted on the roof of a building to avoid noise pollution. Sometimes industrial HVAC units are also located on the ground. They send conditioned air into the building via ductwork.
- Heat Pumps: A heat pump functions like a refrigerator but in reverse, extracting heat from the water or air to warm the building.
- Heaters: There are two types of industrial heaters:
- Radiant heaters that use infrared radiation to provide direct heat to objects
- Hot air furnaces that heat the air by burning fuel.
Industrial HVAC systems differ from residential ones in several ways:
- Much larger.
- Units are located on the rooftop.
- Systems include more complex mechanisms.
- Contain multiple drainage pipes and pans.
- Equipment allows modular installation.
- Systems often require more customized equipment.
Sensors in HVACR Applications
As already mentioned above Pressure Transducers play an important role in the performance and energy efficiency of HVACR systems. They can help you to maintain the adequate flow rate in air-conditioning systems, measure relative humidity, ensure airquality and minimize the formation of mold in the tubing. In general, the sensoring devices can be split into pressure sensors, current sensors and relative humidity sensors. HYB sensors are suitable for any environment and cover a wide range of pplications. Current sensors can control pumps, fans and blowers, whereas humidity sensors protect sensitive environments and processes. Our flow meters enable static, flow and differential pressure measurements and are suitable for very precise low-pressure systems to more robust industrial environments. The main quality of HYB Pressure Transducers is high accuracy, reliability and custom-made solutions, designed according to high-demaning environments, such as clean rooms in medicine or pharmacology.
Description of HYB Pressure Sensors
HYB Pressure Transducers are designed in compact and robust hermetically sealed metal housing with connector which ensures that the transducer can be used in harsh environments. Ceramic measuring cell with piezoresistive measuring principle, programmable (ASIC) temperature compensation and calibration provide high total accuracy over compensated temperature range and long-run stability. High performance and accuracy provide the
maximum freedom for many types of applications based on dry air or non-corrosive gases or liquids.