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The double shaft air conditioner is designed to use less energy while maintaining good indoor air quality and comfort. However, several types of double-shaft air conditioners exist to serve varying purposes. They include the following:
Variable Air Volume (VAV) System
A VAV is a control mechanism for air conditioners. It provides airflow that varies. However, it keeps the temperature constant throughout a building. The system uses a double-shaft blower that typically mixes or moves air. The mix or movement of air gives rooms or zones different amounts of air. A VAV box is used to change or adjust the amount of air flow. It changes the volume and velocity of the flow of air from the central duct. As a result, the room or zone attains the temperature set on the thermostat. Generally, the VAV allows an AC central unit to be efficient while operating. It also helps to cut down on the energy usage of the heater or AC equipment.
Heat Recovery Ventilator (HRV)
An HRV works by transferring heat from the exhaust air to the fresh air that is being supplied. As the name suggests, it recovers heat. An HRV is a good option when the goal is to reduce heating expenses and boost indoor air quality. It works well especially in cold climates or winter months. Many homeowners and building occupants benefit from an HRV. The double shaft in an HRV consists of two separate fans. Each of the fans has independent functions. The first fan exhausts the indoor air. On the other hand, the second fan draws outdoor air into the indoor space. The double fans allow an HVAC system to have good ventilation. It also makes it possible to control the indoor humidity.
Fan Coil Unit (FCU)
A fan coil unit (FCU) is a basic equipment that is used to cool or heat large spaces. The double shaft in an FCU comprises two blowers. Each blower does its unique job. One mini blower is assigned the task of recirculating the indoor air. On the other hand, the second blower takes care of the task of bringing in fresh air from the outdoor environment. FCUs can be classified into two broad categories — four-pipe and two-pipe models. A four-pipe model has two supply lines and two chilled water return lines. It allows cooling and heating at the same time. On the other hand, a two-pipe model has one chilled water supply and a single water return line. It only allows the system to function in a single manner at a time.
Size and Weight:
A double shaft air conditioners is generally bigger and heavier than single shaft models. The dimensions may be 1800*820*1300mm, and the weight is about 516.3kg. The actual sizes can alter depending on the power and model.
Cooling/Heating Capacity:
This refers to the volume of cool or warm air the machine can produce. Double shaft air conditioners are usually more powerful, registering at 5,662.35W for cooling and 8,298.56W for heating. The horsepower ranges from four to five.
Energy Efficiency:
Euro labels released data showing that double shaft air conditioner earns a class A energy efficiency rating. The coefficient of performance is 4.5.
Noise:
The noise emitted by a double shaft air conditioner is around 75dB. This is lower than single shaft models that emit noise of up to 80dB.
Cleaning:
Clean the outer housing and inner parts of a double shaft air conditioner regularly. First, turn off the power supply to avoid an electric shock. Next, use a dry cloth or soft brush to wipe away any dust or foreign objects. Users can also use a vacuum cleaner to remove debris from the interior. For stubborn dirt, dip a cloth in a small amount of water and clean it. Users should avoid using excessive amounts of water as it may damage the components. Additionally, when cleaning with water, users should ensure it is off.
Replacing the filter:
A double shaft air conditioner comes with a filter that purifies air from pollutants and bacteria. The user should clean the filter regularly per the manufacturer's instructions. More importantly, the user should regularly check if it needs to be replaced.
The application of double-shaft air conditioners cuts across different industries. Below are some of them.
Industrial Plant:
Double-shaft air conditioners are used for large-scale industrial space cooling. Factories, warehouses, workshops, and other places can employ double-shaft air conditioners to exhaust air. This will result in reducing the indoor temperature, improving the working environment, and meeting the cooling needs of production processes.
Commercial Buildings:
It is possible to install a double-shaft air conditioner in commercial buildings like offices, shopping centers, hotels, etc. The device can be used for centralized fresh air, ventilation, and space cooling. This will improving the indoor comfort of workers and customers.
Restaurants and Canteens:
A double-shaft air conditioner can be used in restaurants and canteens to ventilate the dining area. It can also be used for kitchen exhaust. This will help to control the indoor temperature, eliminate peculiar smells, and improve air quality.
Supermarkets and Stores:
Double-shaft air conditioners can be used in supermarkets and retail stores to improve the shopping environment. This will make customers feel comfortable. It can also assist in the preservation of commodities.
Factories and Construction Sites:
Double-shaft air conditioners can be used in places such as chemical factories, power plants, and food factories. This is especially true for workshops and enclosed spaces that have numerous equipment heat sources. Double-shaft air conditioners can be used to reduce the indoor temperature and control the dilution of harmful gas concentrations. Thus, it ensures that the production sites are safe and the quality of the products is guaranteed.
Outdoor Temporary Places:
Special occasions such as outdoor temporary places and large-scale activities can benefit from double-shaft air conditioners. This may include open-air performances, exhibitions, and outdoor construction sites. The device can be used to provide temporary cooling and comfortable space for indoor working and participation.
Mainframe and Server Rooms:
Double-shaft air conditioners can be employed in mainframes, server rooms, and data center cabinets. It will help to ensure the stability and security of important equipment by maintaining the room's temperature and humidity.
Transportation:
The double-shaft air conditioner can be used in vehicles such as large buses, ships, and aircraft. It is capable of providing ventilation and cooling for the cabin. This will improve the comfort of passengers and crew.
When choosing a double shaft air conditioner for resale, buyers should consider the wide applications. Essentially, a double shaft air conditioner is suitable for regular commercial spaces, warehouses, greenhouses, data centers, and other large rooms. Therefore, it is important to research the target market demand and the commercial space dimensions to determine how huge or small the zoning/room partitions of an air conditioner should be.
Also, since a double shaft air conditioner offers simultaneous heating and cooling via a single refrigerant, buyers should consider the refrigerants used by the air conditioner. They should look for options that deliver both sides of the performance effectively and efficiently. Additionally, the distinct zoning system of a double shaft air conditioner involves the use of multiple indoor units connected to a single outdoor unit. Indoor units include ducted, cassette, and ductless units. Ducted units are ideal for commercial spaces with large ceilings. Buyers should be conversant with these different types of indoor units and their suitable applications to get indoor units that match indoor occupants' demands and investors' expectations.
Apart from the zoning system discussed earlier, a double shaft air conditioner comes with several other zoning options, such as the airflow direction. A model like the double shaft ceiling air conditioner is suitable for commercial spaces with large ceilings. In contrast, a floor-standing air conditioner will be considered more suitable for a greenhouse facility. The same applies to an upward-flowing air conditioner. Buyers should, therefore, familiarize themselves with how each of the zoning options works. Also, they should have a basic knowledge of the layout of different commercial spaces like hotels, factories, offices, and schools. This will enable them to purchase a double-shaft zoning air conditioner that suits the needs of an end user in a particular commercial space.
Investors in the machinery industry will mainly be interested in the durability of a double shaft air conditioner. Buyers should consider options manufactured using high-strength materials bearing high-pressure and tensile strength ratings. Moreover, the double-shaft air conditioner is designed for high-volume airflow to ensure sufficient air circulation and maintain optimal indoor comfort. Consequently, it relies on robust motors to deliver the necessary power. To ensure durability, buyers should look for a double-shaft air conditioner that has a permanent lubricant-sealed ball bearing.
Q1: Why are double shaft air conditioners durable?
A1: Double shaft air conditioners are durable because they can withstand high use. The design allows stationary or dynamic components to last longer. They also have less tendency to break from fatigue. The air conditioner can be running all day and still have significant performance.
Q2: Can people retrofit double shaft air conditioners?
A2: Retrofit means to add a new feature to something old. Yes, double shaft air conditioners can be retrofitted to add modern components such as energy-efficient parts. With the right skills, technicians can replace or upgrade sections of the air conditioner.
Q3: What is the main difference between single shaft and double shaft air conditioners?
A3: The main difference between single and double shaft air conditioners is the rotor design. A double shaft design permits greater power transmission and leads to better functionality. In contrast, the single rotor version has a simple design, which makes it less costly.
Q4: What type of double shaft air conditioner allows variable frequency control?
A4: The double shaft indoor unit allows variable frequency control. It's a cooling technology that varies motor speed. It adjusts the compressor's speed to meet changing cooling demands. This indoor unit provides precise temperature control, boosts energy efficiency, and lowers operation noise.
