HVAC System has the function of maintaining suitable temperature and humidity, creating a comfortable living and working environment. It helps protect human health, save energy, and protect infrastructure. Let's Tan Long learn more about the system What is HVAC? and related information through the article below!
What is HVAC? Overview of HVAC Systems
What is the concept of HVAC?
What is HVAC?? Is an abbreviation for Heating, Ventilation, and Air Conditioning (Heating, Ventilation and Air Conditioning System). This is a system that is capable of controlling the temperature, humidity, and air quality in a space, ensuring the supply of quality air and creating comfort. HVAC Design based on heat transfer, thermodynamics, and fluid mechanics.
Variations of HVAC
HVAC & R: The system includes refrigeration.
HVACR: Cooling system but no ventilation.
History of HVAC Systems
HVAC based on the invention of many scientists such as Nikolay Lvov, Michael Faraday, and Willis CarrierThe first air conditioning system was designed in 1902. Coyne College start training on HVAC since 1899. Many improvements were developed during the industrial revolution.
Common signs to identify HVAC system
The HVAC system typically have square, round, or oval ducts and pipes running throughout the building. Common air handling equipment is AHU (Air Handling Unit).
Above is all the general information answering the question. What is HVAC? and the history of the birth of this system. Let's go to the next part below.
Structure, operating principle and function of HVAC system
Structure of HVAC system
System structure What is HVAC?? consists of three main parts: heating, ventilation and air conditioning, with basic components such as:
- Fan: Air circulation and recirculation.
- Pipeline: Air supply and circulation.
- Air inlet and intake: Bring air into and out of the system.
- Mixed air chamber: Mix indoor air with outdoor air.
- Filter: Removes dust from the air.
- Heat exchanger: Includes heating coil, steam coil, or chilled water coil to regulate air temperature.
- Auxiliary heating equipment: Natural gas or electric resistance furnace.
- Compressed air: Compresses the cold vapor and pumps the refrigerant in the system.
- Water pump: Circulate water through cooling and heating systems.
- Central system: Boiler or cooling tower as central heat source.
- Control system: Manage the flow of air, water, and electricity.
Operating principle of HVAC system
Operating principle of HVAC system What is it? according to the following principle:
- Get fresh air:Outdoor air is brought through AHU for quality control, humidity and pressure regulation.
- Temperature control: Fresh air is temperature regulated 22°C by Heater.
- Air filter: Air is filtered through a filter HEPA to remove fine dust particles, especially in environments requiring clean air such as clean rooms.
- Air circulation: About 90% The air in the room is circulated back. AHU, 10% The rest is discharged.
HVAC system cycle
Cycle of HVAC system operates through three main cycles:
- Supply Air: Provides cold and hot air flow.
- Return Air: Air circulation to the system.
- Exhaust Air: Exhaust dirty air outside, especially from the bathroom.
Function of HVAC system
Function of What is HVAC system?? HVAC plays a role in providing the best air quality in all conditions for people and the production environment, playing an essential role in large projects.
What are the common applications of HVAC systems?
In everyday space:
- Temperature control: Keep the room at the ideal temperature.
- Provide clean air: Make sure the air in the room is cool and fresh.
- Eliminate pollution: Use filters to remove contaminants at different stages.
- Energy saving: Efficient operation and saving materials.
In industries:
- Popular Applications: Buildings, factories, industrial plants, and clean rooms.
- Premium Service: Hotels, luxury living facilities.
- Educational and medical facilities: Offices, hospitals, schools, and laboratories.
- Mean of transportation: Automobiles, trains, planes, ships, and submarines.
- Other environments: Anywhere air quality needs to be treated and improved.
HVAC System widely used to ensure a comfortable, safe, and efficient living and working environment.
HVAC system in clean room
What is AHC? has been answered in the beginning of the article and the application HVAC system In clean rooms, the task is to regulate temperature, humidity and air quality with greater precision to maintain a clean environment.
Cleanroom HVAC Overview
In clean room, HVAC system provide larger air volume and use filters HEPA to maintain stable pressure. Clean rooms require higher air changes, from 15 to 250 times per hour, compared to conventional spaces.
Air flow and number of exchanges
Design requirements What is HVAC?For clean rooms, it is necessary to determine:
- Air flow into the room
- Number of air exchanges per hour
- The level of cleanliness that the room needs to achieve
- The number of air changes is usually specified in a range, depending on the specific application of the cleanroom.
Temperature and humidity
Temperature and humidity of HVAC system need to be strictly controlled. Air conditioners compensate for the heat generated by people and equipment, need to calculate the number of people and equipment to ensure ideal conditions.
Pressure difference
The pressure difference in a clean room is very important:
- Positive pressure: Prevent dust from outside into clean room, protect products.
- Negative pressure: Prevent dangerous dust particles from escaping, protecting the environment and people.
HVAC The supply and return air volumes must be adjusted to maintain the proper pressure differential.
GMP standard HVAC
In standard GMP (Good Manufacturing Practice), HVAC ensure the production environment meets high quality standards such as GMP WHO, GMP EU, and PIC/S GMP, affecting operating efficiency and product quality.
HVAC System Maintenance
Benefits of maintenance What is HVAC??
System maintenance HVAC brings many significant benefits, including:
- Cost savings: Early detection of problems reduces unscheduled repair costs and extends component life.
- Reduce production interruptions: Regular maintenance prevents breakdowns and ensures continuous operation.
- Energy saving: The system operates more efficiently, reducing energy consumption.
- Improve performance: Ensure HVAC function best, providing optimal air and environment.
What are the AHC maintenance jobs and what does it include?
Below are the tasks that need to be performed during maintenance. HVAC system:
Filter maintenance and replacement
Replace filters regularly: Filters trap dust and allergens in the air. Changing your filters regularly helps HVAC system operate cleaner and improve air quality.
Fan maintenance
Fan Inspection and Maintenance: Check the electrical connections and mechanical mechanism to ensure the fan is working properly. Fan maintenance often involves changing the filter.
Fan blade maintenance
Fan blade cleaning: Removes dirt and debris that can put strain on the motor, helping to balance and maintain system efficiency.
Engine oiling
Motor Lubrication: Keep the fan motor oiled regularly to operate smoothly, increase its lifespan and save energy.
Electrical system
Check electrical system: Detect dirt, loose connectors, and fire risks. Regular maintenance helps prevent problems and ensures production safety.
HVAC System Documentation
TCVN 5687-2010 standard for standard HVAC design in Vietnam
Standard TCVN 5687-2010 is the most important standard for HVAC design in Vietnam because:
- Applicable in Vietnam: All domestic constructions must comply with this standard.
- Language: Written in Vietnamese, easier to understand than international standard English.
Software used to design HVAC systems
Software to support design and drawing of air ducts HVAC system essential. Some of the software includes:
- Cooling load calculation: Trace 700, Heatload
- Calculate the size of the ventilation ductDuct Checker
- Loss calculation: Ashrae Duct Fitting Software
- Select AHU and calculate plumbing: Specialized software
- Drawing air duct: Lispnam, Revit MEP
When designing HVAC system, often having to use more than 10 different software to ensure accuracy and efficiency.
HVAC Resources and Community
The Internet is a great learning resource. To learn more about HVAC, you can refer to:
- International articles: HVAC.com
- Vietnamese Documents: Vietnam HVAC Forum HVAC VN
These resources provide a wealth of useful information to help you improve your knowledge and skills in the HVAC field.
Prestigious and quality HVAC system design Tan Long
Tan Long Proud to be the leading unit in the field of design and construction HVAC system for factories, clean rooms for electronic components, GMP, pharmaceuticals, and food. With many years of experience, we are committed to providing solutions HVAC Professional, meeting the most demanding requirements of customers.
Each design of Tan Long are all thoroughly tested and only completed when the customer is truly satisfied. Our team of engineers are not only well-trained but also experienced, have won the trust of many contractors and investors, and are highly appreciated for their quality.
Please contact us immediately. Tan Long via 0933357058 for detailed advice and best quote HVAC system your.
Here are some important things to know when designing. HVAC system. Questions like “What is HVAC?“, structure and operating principles as well as related software and documents when designing HVAC system. Hope this article will help you orient more clearly in your journey to pursue this field. HVAC.
