Role of Centrifugal Fans and Axial Flow Fans in Temperature Control!

Air conditioning and temperature control systems are developed to generate the condition of comfort within the work and home premises. They control humidity, temperature and flow of air within Air conditioning systems are integrated with three various controls-humidistats, temperature control, and air stats. In this blog, we are discussing the importance of Centrifugal and Axial fans.

What Are Axial Flow Fans?

The name axial is given to these category fans owing to the air direction generated by creating them. The first electronically driven powered fans came in the market in the year 1880. Blades moving around axis flow air parallel to the axis and move air with force in a similar direction. The typical mode of axial fans is utilized to exhaust air from the process used for supplying fresh air and major spot cooling of the room, people and machinery.

Axial flow fans having four or six blades and diameters of 6-18 feet are commonly employed in air-cooled heat exchangers, however larger and smaller fans are used occasionally. The plastic fan blades are helpful for air temperatures upto 175-degree Fahrenheit, and metal blades are used for higher air temperatures.

Most frequently electric motors are used as fan drivers, however, at some frequencies turbines are also used. Speed reduction is usually accomplished with the use of V belts, high torque drive belts, reduction gearboxes.

Variable pitch fans are specially used for facilitating process side temperature control in air-cooked exchangers. The pitch of the blade is automatically adjusted for providing the required airflow for maintaining the desired outlet temperature of the process fluid.

Industrial Extractor Fans

The heavy-duty design and performance of Axial Flow fans make it suitable for every environment. They are perfectly suited as an effective means for circulating huge amount of air across the premises.

Air Flow Direction-Air that moves from motor to impeller is said as standard. And the air moving from impeller to motor is moved on request.

Static Pressure- up to 100 mm weight

Comprehensive choice of diameters- Range from 250 mm to 1600 mm

Introduction To Centrifugal Fans

Typically centrifugal fans have eight types that draw air into the inlet of housing blower via the wheel and discharges it at 90 degrees. There are two major types of blowers-Pressure blowers and volume blowers. Pressure blowers are specially designed to drive or push air at high pressures. Fans are made of SS, fabricated steel or cast aluminum.

Size, specification or range of centrifugal fans

Size- Impeller Diameter with minimum 1050 mm

Temperature: up to 425 °C

Pressure- 1200 mm wg. to 2500 mm wg.

Airflow: Single and double widths 125000 CMH to 275000 CMH

I hope you get an overview of centrifugal fans & axial flow fans. If you are searching for an authentic platform for purchasing a perfect piece of such products, then you can request a free quote at Ventech Systems.

Evaporative Air Coolers—Highlights of Technology, Functioning & Maintenance

Evaporative coolers are used as an effective way to cool indoor spaces.  Also, called swamp coolers, these coolers pass it over water-saturated pads that cause water to evaporate into it. In areas with low humidity, evaporating water into air offers a natural and energy-efficient means of cooling.

Here are a few points that are necessarily important for sizing, selection, installation, and maintenance of Evaporative Air Coolers.

SIZING AND SELECTION of Evaporative Coolers

The size selection of evaporative coolers is defined by cubic feet per minute of air that is being delivered by them to the house.

●     The most common range of Evaporative Air Coolers is 3000 to 25000 CFM.

●     Air moving capacity: 20 to 40 air changes per hour

INSTALLATION of Evaporative Air Coolers in India

The installation mechanism of evaporative coolers is defined in one of two ways-

The first cooler blows air in a central location: 

Such kind of configuration is suitable for compact houses, and they are open from room to room.

Or secondly, The cooler connects with the duct-work:

It distributes the air to different rooms. This kind of configuration is required for larger houses with hallways & multiple bedrooms.

Most of the time people install down-flow evaporative coolers on the roof of their houses. However, some experts choose ground-mounted horizontal units featuring easy maintenance and low risks of roof leaks.

Small horizontal flow coolers are installed in windows for a cooling room or a section of the home. Such portable evaporative coolers work well in moderate climates, however, they are not sufficient to cool in hot climates. Room evaporative coolers can reduce the temperature in a single room by 5 degrees to 15 degrees Fahrenheit.

OPERATION of Evaporative Air Coolers India

For efficient working, and an evaporative cooling mechanism, an evaporative cooler should have a minimum of two speeds and a vent only option. The water pump does not operate, and outdoor air isn’t humidified in the vent- only operation. Other than this, it also enables you to use the evaporative cooler as a whole-house fan during the mild weather.

Movement of cooler air can be controlled through the house after the adjustment of window openings. For providing openings upto 2 square feet for each 1000 CFM of cooling efficiency, windows or vents are opened on the leeward side of the house.

If windows are open too far, the hot air will enter, and if windows are not open far enough, there will be humidity created in the home. For controlling humidity and temperature across different areas, you need to keep opening & closing the windows accordingly.

MAINTENANCE OF EVAPORATIVE AIR COOLING UNITS

If your cooler is maintained properly and timely, it saves you lots of time, work and money. Keep draining & cleaning your evaporative cooler on a regular basis and ensure periodic removal of sediments & minerals.  Every season, there should be major cleaning. Also, the more cooler runs, the more maintenance it requires. Also, pads should be replaced a minimum of two times in a cooling season.

Well! The evaporative coolers are very beneficial and economic as they require only minor to moderate setup. Other than this, it is based on basic cooling technology, known for cost-effectiveness and environment-friendly nature.

Estimated Cost to Install Central Air Conditioners and Know-how to save overall cost.

When it comes to calculating the estimated cost of centralized air conditioners-The average cost depends on several reasons. Also, if you are using central air conditioners wisely, then you can save a lot of money by hiring the right contractor and scheduling the installation in the offseason. A central air conditioning can solve your sweat problems, however, prices may create a worrisome situation.

Factors that affect the cost to install the central air conditioner

The price of the air conditioning unit is only one part of the total cost to install a central air conditioner. Along with the price of air conditioning, other payments are also associated like pre-installation evaluation, possible air duct installation, or modification and hiring cost of expert professionals.

Pre-installation evaluation

Before the installation of any air conditioning system, the first important step is to calculate the J-load calculation manually. Through this calculation, the contractor knows how much heat is received by your house, and what size of conditioner will be needed to maintain it cool.

Ductwork and design

Once manual J-load calculation is done carefully, secondly the contractor should check systems associated with air conditioners that are reliable for the application. At the same time, it is necessary to ensure the central air handling capability of ductwork. The quality of ductwork much more depends on its design.

The Central Air Unit

After the evaluation of home performance and support systems, now comes the time to select an air conditioning unit. The size and structure of your premises depending on the following types:

●      Split air conditioning systems

●      Packaged central air systems

●      Heat Pumps

Installation and Labor

The business size of air conditioning system contractors and their location are two factors that may affect the installation cost of central air conditioning systems. According to the research, half of the HVAC systems are not installed correctly that’s why their efficiency level is decreased by up to 30%. That’s why finding the right contractor is very important if you want to save both time and expenses.

If you are in search of the right contractor, then here are a few points you need to take care of:

●      Check their website, history, work history, and online reviews

●      Compare  three different companies to find out what is exactly right for you

●      Ask them about their expertise, certifications and quality standards

Tips to control installation costs of air conditioning systems!

1. Carefully examine your cooling needs-

For one single house, a ductless mini-split air conditioning system is a suitable utility.

These systems are a combination of outdoor compressor and condenser along with indoor blower vents that is suitable to be fixed about any exterior wall.

In short, ductless systems are an efficient way to cool small zones within a large home-like TV room, bedroom, etc.

2. Choose the correct time of HVAC installation

Air conditioning systems are found extremely busy in the hottest & coldest months. If you want to pay a lower price for them, then you should schedule their installation in offseasons like spring and fall.

3. Look tax credits and equipment rebates

Governments, as well as utility companies as well as manufacturers, promote the usage of highly efficient air conditioners via financial incentives.

If you consider following the above-mentioned tips carefully then you can not only make efficient usage of air conditioners but also save a lot of costs.