HOW CAN HVLS FANS BE BENEFICIAL FOR DIFFERENT COUNTRIES? | RTFANS.

HVLS fans are beneficial and common nowadays. This is an incredible technology of fans that can cover a vast area at a low cost. These are mostly used in industries, cattle farms, shopping centers, libraries, factories, etc. Some people don’t know about HVLS fans, and they are often confused about the use and purposes of these fans. So, we are going to explain HVLS fans and their functions in detail. We will also discuss the use of HVLS fans in India, the Philippines, Vietnam, Thailand, Australia, and Singapore. We will tell you why HVLS fans are beneficial in these countries. Let’s start the discussion.

What are HVLS fans?

HVLS fans are large ceiling fans that can have a diameter of up to 7.3m (24ft). These large fans can cover an extensive area because of their huge size and aerodynamic design. HVLS is the acronym of High Volume Low Speed. They are called HVLS (High Volume Low Speed) because they can provide a high volume of air by running at low speed. We all use fans at our home, but those fans run at a very high speed, and they are very much small as compared to HVLS fans. The size of HVLS fans can vary from 7.3m (24ft) to 2.8m (8ft).

The design of HVLS fans is also unusual because they are designed according to aerodynamic standards. You will see six blades or more in these fans. Some fans even have eight blades. Due to their design, they can provide a high volume of air, and they can cover a vast area.

Typically, you will see two types of HVLS fans in the market, which are for industrial and commercial purposes. You can install these fans at different places to get excellent air quality and airflow at a low cost.

HVLS Fans VS Traditional Fans

We are going to compare HVLS fans and the traditional ceiling fans that we use at our homes and offices. You will have an idea which is beneficial.

For a 9000 sq-meter area, you will have to use hundreds of traditional fans. Approximately, there will be 300 units to cover the whole area. In contrast, only six huge industrial HVLS fans can cover the area. You only need six fans; this is incredible.

The total KW of traditional fans will be around 100kW, but the total KW of large industrial ceiling fans will be only 9 KW. This is an enormous difference between the power consumption of the fans. Thus, you can save a lot of energy by using large HVLS fans.

You might be worried about the HVLS fan’s noise. But surprisingly, the noise of these large fans is lower than 43 DB. The noise level of a library is around 40DB; now, you can easily evaluate how much silent HVLS fans are. Only one fan covers an area up to 1800 sq-meter depending on the size. These fans are the new face of technology that can save your money, space, time, and provide you fresh and healthy air. Therefore, you can save energy if you use these HVLS fans in India, Vietnam, Australia, Philippines, Thailand, and Singapore.

What can a Large HVLS fan Do?

We all know that fans can provide air, but a large HVLS ceiling industrial or commercial fan can do a lot more. Let’s discuss its functions.

Dehumidification

RTFANS HVLS fans can do dehumidification up to some extent. The high airflow can reduce the humidity of the area. It makes the air fresh and healthy. They can do dehumidification up to 15%. So, you will not need any dehumidifier.

Destratification

The air in an area is divided into layers; the lower layer near the ground has a low temperature while the upper layer has a higher temperature. This is called stratification, which is not suitable for winters. HVLS fans can mix up the air of all layers. It maintains a similar temperature in the whole area. Thus, the temperature of the lower layer is increased that provides comfort to the people in the winter season.

Chilling Effect

The human body excretes liquid called sweat, and it is more during the summer season. HVLS fans provide a high volume of air; therefore, the sweat on the bodies evaporates quickly. Due to quick evaporation, the body feels cool, which is excellent in summers. The worker or people in the area feel more comfortable and fresher.

Space Ventilation

RTFANS HVLS fans spread the air through its well-aligned breezes over the whole area. Every corner of the area is covered. In a large area, it is impossible to do ventilation through exhaust fans, but HVLS fans are excellent for ventilation. You can also use these fans when you don’t want to use HVAC systems.

Reduces HVAC Usage

HVLS fans reduce the usage of HVAC systems by spreading the air in the whole area. It spreads the air quickly within no time. So, you don’t need to run your AC at a lower temperature; you can increase the temperature a little bit and use the fan with it.

These are the applications that make HVLS fans usable in all seasons. You can use HVLS fans in India, Vietnam, Thailand, Australia, Singapore, Philippines, and other countries.

Use of HVLS Fans in Different Countries

We are going to discuss the use of HVLS fans in some countries. Let’s discuss it.

HVLS Fans in India

India is a big country that enjoys six seasons. The seasons are Spring, Summer, Monsoon, Autumn, Pre-winter, and Winter. There are different regions; some are very cold in winter with temperatures lower than 5˚C such as Darjeeling and Himanchal Pradesh, while some have temperatures around 11˚C-26˚C in the NW Indian plains. In hot seasons the temperature of Delhi and NW Indus plains is around 24˚C- 36˚C while the colder region remains in the range of 12˚C-20˚C. This shows that India has many seasons, and different regions have different temperatures. The country enjoys all seasons.

RTFANS HVLS fans are excellent for such temperatures. You can use these fans in winter for destratification and in summer for the cool breeze. In normal temperatures, the fans can work for ventilation and fresh air. Thus, it is beneficial to use HVLS fans in India.

HVLS Fans in Australia

Australia enjoys four seasons, which are summer, winter, autumn, and spring. HVLS fans are beneficial for all these seasons. The summers in some regions are very hot with the highest temperature around 53˚C. In winter, the temperature of some areas is below 0˚C. So, Australia also has different seasons and temperature ranges. You can use HVLS fans in all the above seasons by varying the speed of the fan. In winter, you can use the fan at a low speed that can do destratification. While in summers, it is excellent to assist your HVAC system in hotter areas while in lower temperatures of summer, these fans will provide excellent breeze that will eliminate the need for the HVAC system.

HVLS Fans in Singapore

In Singapore, the average maximum temperature of hot seasons is approximately  30˚-34C, while in cold seasons, the minimum average temperature is around 22˚C. You can say that it remains hot throughout the year. In this condition, the HVLS fans can assist HVAC systems and reduce your bills. These fans can reduce the humidity of the area in humid days. The most important use is their high airflow, which is splendid for hot seasons.

HVLS Fans in Thailand

Thailand remains warm over the whole year. There is no snow falling in any season. In Spring, it is very hot around 35˚C. The summer season is wet with high humidity, and the average temperature is 32˚C. Surprisingly in the winter season, the minimum average temperature is around 21-23˚C. In short, it remains warms throughout the year, and some months are very wet.

HVLS fans can provide chilling effects and powerful breeze in hot seasons, which will keep people fresh and healthy. They can also do dehumidification up to 15%. Therefore, the use of HVLS fans in Thailand is a good idea.

HVLS Fans Vietnam

There are two seasons in Vietnam, which are dry and rainy. There is very little change in temperature throughout the year. The winters are not much cold; the minimum average temperature is 14-15˚C. The maximum average temperature in summer is 33˚C, which is in July and June. The overall climate is not very cold, and it is hot most of the time. HVLS fans in Vietnam can do ventilation and dehumidification. They can help to spread the air of HVAC systems quickly in the area.

HVLS Fans in the Philippines

The Philippines is a beautiful archipelago that is made of 7100 islands. The maximum average temperature in hot seasons is 31-34˚C. While in cold seasons, the minimum average could be around 21˚C. There are only two seasons; wet and dry. It remains hot over the year with a high level of relative humidity. The HVLS fans in the Philippines can work well to reduce humidity and provide high airflow in the area.

Endnote

HVLS fans are huge; they can be large commercial and industrial ceiling fans. They not only provide air, but they can be used for different purposes such as dehumidification and destratification. We have discussed the use of HVLS fans in India, Vietnam, Thailand, Australia, Singapore, and the Philippines. All these countries can get benefits from HVLS technology. RTFANS provide all its large industrial and commercial HVLS ceiling fans in these countries. You need to contact us, and we will tell you the right size and model of the fans. Our team is always ready to help you. For information and queries, feel free to contact us.

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High Volume Low-Speed HVLS Fans

Introduction

A high-volume low-speed (HVLS) fan is a type of mechanical fan that is more than 2.1 m in diameter. These fans are generally ceiling fans while some are pole mounted. HVLS fans are best to spread large amounts of air at low rotational speed and move slowly hence named "high volume, low speed." 

Mostly HVLS classified into two types that are industrial and commercial. In industrial applications, air conditioning is often cost impractical. Fans that are installed in spaces like warehouses, hangers, barns and distribution centres can stop heat stress, increase worker ease and the output of both workers and livestock. HVLS fans are helped in commercial spaces, where air conditioning is more common, but increased air movement from ceiling fans can cost-effectively augment occupant comfort or prevent stratification. But commercial applications include shopping malls, office buildings, churches, fitness centres, airport terminal buildings, and schools. 

HVLS FANS SPACE VENTILATION

Working of HVLS Fans

HVLS fans work on that cool moving air breaks up the moisture-saturated boundary layer encompassing the body and accelerates evaporation to produce a cooling result. Ceiling fans manufacture a column of air as they turn. This column of air moves down and out on the ground. That’s also called a horizontal floor jet, this deep wall of horizontal moving air is comparative to the diameter of a fan, and to a lesser degree, the speed of a fan. Once the floor jet reaches its prospective, it migrates outward until it meets a side wall or other vertical surface.

In ideal conditions, 2.4 m diameter fan produces a floor jet of air approximately 36 inches (910 mm) deep. A 7.3 m diameter fan produces a floor jet 108 inches (2,700 mm) deep, tall enough to engulf a human standing on the floor or a cow, its initial development purpose. 

Commercial HVLS fans differ from residential ceiling fans by diameter, rotational speed, and also performance. Whereas some fans use contemporary blades to move air, other methods are being used to make it more proficient such as using airfoils. 

Benefits of HVLS

·         HVLS fans use comparatively little energy and deliver a gentle, quiet breeze. However, the smaller floor-mounted fans can help in limited areas and they have high speed so their high wind speed can cause problems; noisy operating levels introduce another stress-inducing factor and also cause to consume high amounts of electricity. 

·         Technically advanced HVLS fans are best to move the air of large areas and can move large volumes of air over an area up to 22,000 square feet. An HVLS fan can cover the large area so it may replace as many as 20-floor fans, so it can lower the chances of an accident as reduce clutter on the ground.

·         HVLS fans also support air-conditioning systems work more proficiently, allowing them to be run at a lower set point. So it can help by mixing the air. 

·         Air movement can have an important influence on human thermal relaxation. Wind chill in cold conditions is considered unfavourable, but air movement in neutral to warm surroundings is considered helpful. This is as a result of unremarkably beneath conditions with air temperatures higher than concerning 74 °F, the body has to lose heat to take care of a continuing internal temperature.

·         As air conditioners, which cool rooms and fans cool people. Ceiling fans raise airspeed at the occupant level, which helps more efficient heat rejection, cooling the occupant, somewhat space.

·         It can allow the mixing of air in the space while reducing both heat loss through the building roof and walls and building energy consumption.

Applications for HVLS Fans

Industrial use: HVLS fans work well that way these are use industries. HVLS fans maintain airflow in the warehouse and manufacturing floor and also help in temperature control during company luncheons. 

HVLS fans are best for aviation, manufacturing, auto service and also shop environments. However HVAC systems in these applications are simply not cost, effective or even feasible, HVLS fans make a great alternative to maintaining worker comfort and output. 

Commercial use: HVLS fans can prove useful for commercial uses. Installation of HVLS fans cut down on heat and cooling costs as the increased airflow allows both to be more efficient in educational institutes. Also, sporting venues, medical offices, shopping malls and places of worship have discovered the same benefits and savings.

Agriculture use: HVLS fans the technology was used at a dairy farm, farmers use them for cooler cows produced more milk. After the successful establishment of these fans in dairy forms, HVLS fan technology moved into other agricultural operations including equine, poultry, swine and fair exhibitions.

Besides keeping livestock cool and easy, the fans also control moisture as pests attract to moistures and cause the diseases. So these are best to reducing or even eradicating moisture in livestock settings decrease the chance of infections as mastitis in dairy cattle.

Industrial Ceiling Fans for Warehouses

In the warehouse, fans are used for different purposes many times like cooling, refreshment, heating, etc. These fans are small size, not a large size. Now a day large industrial ceiling fans are utilized that are much better than others and cover the large area. As warehouse large fan ranges in size from 9 to 24 feet in diameter and can cover the large area up to 1800㎡. 

So the HVLS fans are used for many reasons as they can decrease condensation, circulate the airflow incomplete space, also warm spaces in winter by recommended reverse rotation, Save money on cooling and heating costs and HVAC equipment repairs, cool the area in the summer with up to 30 per cent greater coverage, help in the reduction of airborne pollutants and also protect your equipment and inventory from humidity. 

Benefits of HVLS Fans in Warehouses

·         Air conditioners used for cooling but blow it cold air from a single point, but they don’t spread the cold air in the complete space. So large commercial high-volume, low-speed fans do this. Installation of HVLS fans results in cooler air, lower power bills and workers feel comfort and result in increasing their output.

·         Some warehouses don't seem to be occupied enough to justify air con. So there, heat can form dangerous levels for workers. Even when the air conditioner is not used then large industrial ceiling fans keep more people cooler in warehouses by producing a fresh breeze and eliminating stagnant air.

According to some studies, It can improve employee comfort results in greater employee output by up to 2% per degree when interior temperatures are above 77 degrees. Improving your fan the system can save your money and time, and also prevent excessive respiratory problems as well.

What is the disadvantage of PMSM Fans?

We talked about advantages of PMSM HVLS fan few days ago, then what is the disadvantage?

1) Irreversible demagnetization problem. 

If under improper design or operation, or the PMSM runs at too high or too low temperature, performance of the motor will be degraded or even unusable when it works in the armature of surge current or severe mechanical vibration.

2) Cost problem. 

Price of lanthanon permanent magnets is relatively expensive, the cost of lanthanon PMSM is generally higher than electro-magnetic motors, which needs to be compensated by its high performance and operating cost savings.

3) Controlling system. 

A PMSM can maintain its magnetic field without external energy, but it also makes it extremely difficult to adjust and control its magnetic field from the outside. However, with the development of power electronic devices and control technologies such as MOSFET and IGBT, most of PMSM can be used for armature control without magnetic field control. The design requires the combination of three new technologies, permanent magnet materials, power electronics and microcomputer control, so that the permanent magnet synchronous motor operates in a brand new working conditions.