Cara Kerja AC Central Dengan Water Cooled Chiller

Engineering Kampungan

16 Mar 202204:05

Summary

TLDRIn this video, the presenter explains how central air conditioning works, specifically in large buildings. Using York brand chillers, the video details how these machines cool water to 3-5°C, which is then distributed to various areas via centrifugal pumps. The air handling unit (AHU) processes and cools the air before distributing it throughout the building. The condenser's heat is removed using a cooling tower system, completing the process. This step-by-step explanation offers viewers a clear understanding of the central AC system. Don't forget to like, comment, and subscribe for more insights!

Takeaways

💨 Central air conditioning in large buildings is explained using York brand chillers.
❄️ Chillers are refrigeration machines that cool water, and can produce temperatures of 3-5 degrees Celsius.
🔧 The refrigerant is compressed, then passes through the expansion valve and condenses in the evaporator to cool water.
🚰 Cooled water is circulated through pipes using a centrifugal pump (CHWP) that has a power of 180 HP and a capacity of 2400 gallons per minute.
🏢 The cooled water is distributed to the Air Handling Unit (AHU) to regulate and process air before it's distributed to rooms.
🌬️ The AHU uses a blower to pull in air through a filter, passes it through the evaporator, and then distributes cooled air through ducting.
🔥 Because the chiller condenser has a high temperature, a cooling system using water is implemented.
💦 The CWP pump circulates water to the Cooling Tower, releasing heat from the condenser with the help of a blower motor.
♻️ Water is cooled in the Cooling Tower and recirculated back to the chiller condenser unit to complete the cycle.
👍 This video explains the working process of central air conditioning and encourages viewers to like, comment, and subscribe.

Q & A

What is the main function of a chiller in central air conditioning systems?
-The main function of a chiller in central air conditioning systems is to cool water, which is then used to lower the air temperature in the building.
What is the temperature range that the York brand chiller in the video can produce?
-The York brand chiller mentioned in the video can produce water temperatures ranging from 3 to 5 degrees Celsius.
How does the refrigerant flow in the chiller system?
-In the chiller system, the refrigerant is compressed and pushed through the expansion valve, then condensed in the evaporator, where it helps cool the water.
What role does the centrifugal type pump (CHWP) play in the cooling process?
-The centrifugal type pump (CHWP) helps distribute the cooled water through the pipes, allowing it to reach the Air Handling Unit (AHU) and subsequently cool the building.
What does AHU stand for, and what is its function?
-AHU stands for Air Handling Unit. Its function is to regulate and process air before it is distributed to different areas of the building for air conditioning.
How does the air cooling process occur within the AHU?
-In the AHU, air is sucked in using a blower, passed through a filter, and then through the evaporator. Heat transfer occurs, cooling the air, which is then distributed through ducts to different rooms.
Why is there a need for a cooling system for the chiller condenser?
-The chiller condenser has a high temperature due to its role in the cooling process, so a cooling system is needed to lower its temperature using water that is circulated by a pump to the Cooling Tower.
What is the purpose of the Cooling Tower in the central air conditioning system?
-The Cooling Tower helps release the heat absorbed by the water in the chiller condenser, allowing the water temperature to decrease before it is recirculated back to the chiller.
How is the cooled water circulated back to the chiller condenser after passing through the Cooling Tower?
-After the water is cooled in the Cooling Tower, it is recirculated back to the chiller condenser unit to continue the cooling process.
What type of pump is used to circulate water to the Cooling Tower, and how does it differ from the CHWP?
-A pump similar to the CHWP is used to circulate water to the Cooling Tower. However, unlike the CHWP, this pump and its pipelines do not have an insulating layer.

Outlines

00:00

🌬️ Introduction to Central Air Conditioning

The video opens with a greeting and a question about how air conditioning works in large buildings. The host introduces the topic of central air conditioning and mentions the use of York brand chillers, each with a capacity of 2000 TR. A chiller is a refrigeration machine designed to cool water, capable of producing water temperatures between 3-5°C. This sets the stage for a deeper explanation of the air conditioning process in large buildings.

❄️ How the Chiller System Works

The host explains the core function of the chiller, which cools water by circulating refrigerant through the compressor, expansion valve, and evaporator. This refrigerant undergoes a phase change in the evaporator, cooling water that is then pumped through pipes using a centrifugal pump (CHWP), which has 180 HP and can deliver 2400 gallons per minute. This system provides the cool water needed for the air handling unit (AHU) to function.

🌡️ Air Handling Unit (AHU) Process

The video describes the Air Handling Unit (AHU), which processes and regulates air before distributing it throughout the building. The AHU uses a blower to draw in air through a filtered return channel, passing it through the evaporator where heat transfer cools the air. The cooled air is then delivered to various rooms through ducting, completing the process of air cooling in the building.

🚿 Cooling Tower and Condenser Process

The chiller's condenser generates a lot of heat, requiring a secondary cooling process using water circulated by the CWP pump. This water is pumped to the Cooling Tower, where it loses heat with the help of a blower motor before returning to the chiller condenser. Unlike the CHWP system, this setup doesn't use insulation on the pump and pipelines, ensuring effective heat dissipation.

👋 Conclusion and Sign Off

The video wraps up with a brief recap of how the central air conditioning system works and its utility in large buildings. The host expresses hope that the explanation was helpful and encourages viewers to like, comment, and subscribe before signing off and promising to return in the next video.

Mindmap

Keywords

💡Chiller

A chiller is a refrigeration machine designed to cool water by removing heat from it. In the video, the York-brand chiller is discussed as having a capacity of 2000 TR and being capable of producing water temperatures of 3-5 degrees Celsius. This cooled water is then used in the air conditioning system to lower the temperature of the air in large buildings.

💡Compressor

The compressor is a crucial component in refrigeration and air conditioning systems. It pressurizes the refrigerant, which allows it to flow through the system. In the video, the compressor forces the refrigerant through the expansion valve before it is condensed and moved into the evaporator, where the cooling process begins.

💡Evaporator

The evaporator is the part of the air conditioning system where the refrigerant absorbs heat and turns into vapor, cooling the surrounding air or water. In the video, the evaporator is mentioned as being where heat transfer occurs, cooling the water that will be used to regulate the temperature of the building.

💡Pump (CHWP)

The CHWP (Chilled Water Pump) is a centrifugal pump responsible for circulating the chilled water through the air conditioning system. In the video, it is described as moving 2400 gallons of cooled water per minute to the Air Handling Unit (AHU), ensuring the water reaches the system for air cooling.

💡AHU (Air Handling Unit)

An Air Handling Unit (AHU) is used to condition and distribute air through a building. The video explains that the AHU takes in air through a filter, cools it by passing it over the evaporator, and then blows it into rooms through ducting. This is a central component of the air conditioning process in large buildings.

💡Cooling Tower

A cooling tower is a heat rejection device that removes excess heat from the water circulating in an air conditioning system. In the video, the Cooling Tower is used to cool down the water that has absorbed heat from the chiller condenser. The water is cooled by air flow from a blower, releasing the heat into the atmosphere before recirculating back to the system.

💡Refrigerant

Refrigerant is a chemical compound used in air conditioning systems to absorb and release heat. The video mentions the refrigerant being compressed and then passed through the evaporator, where it absorbs heat and cools the air or water. It plays a central role in transferring heat out of the system.

💡CWP (Condenser Water Pump)

The CWP, or Condenser Water Pump, is responsible for circulating water through the condenser and the Cooling Tower to remove heat. In the video, this pump, similar in type to the CHWP, circulates the water that cools the chiller condenser by releasing the heat through the Cooling Tower.

💡Blower

A blower is a mechanical device used to move air through the system. In the video, the blower is mentioned twice: once to describe its role in the AHU, where it distributes cooled air into the rooms, and again in the Cooling Tower, where it helps remove heat from the water by forcing air through it.

💡Ducting

Ducting refers to the system of pipes or channels that transport cooled or heated air throughout a building. In the video, ducting is mentioned as the means by which cooled air is delivered from the AHU to the rooms in the building, ensuring the air conditioning reaches every part of the structure.

Highlights

Introduction to central air conditioning in large buildings.

The video uses York brand chillers with a capacity of 2000 TR each.

Chiller's main function is to cool water to a temperature between 3-5 degrees Celsius.

Refrigerant from the compressor is pressed through the expansion valve and condensed into the evaporator.

The cooled water is distributed through pipes with the help of a centrifugal type pump known as CHWP.

The CHWP pump has a power of 180 HP and can produce 2400 gallons per minute.

AHU, or Air Handling Unit, regulates and processes air before distribution to rooms.

Air is drawn through filters via a blower, passes through the evaporator, cooling the air.

Cooled air is distributed to the rooms through ducting.

The chiller's condenser has a high temperature, so a cooling system using water media is utilized.

The CWP pump circulates water to the Cooling Tower, which cools the water using a blower motor.

Heat is released in the Cooling Tower, lowering the water's temperature.

The cooled water is recirculated back to the chiller condenser for further cooling.

This explains the process of how a central air conditioning system cools large buildings.

Encourages viewers to like, comment, and subscribe to the channel.