Retrofit Your ACMV System

Air Conditioning and Mechanical Ventilation (ACMV) systems can account for more than 50% of the energy consumption of a building. Of that 50%, fans can account for 35% of the energy consumption. Therefore, implementing energy-efficient fan technologies can be one of the strategies building owners and facility managers deploy to reduce their energy consumption. Read more here.

Energy-Efficient EC Technology

EC stands for ‘Electronically Commutated’, which means it is a fan with a Permanent Magnet Motor (PMM). EC motors are more efficient than AC motors because they use permanent magnets rather than inducing a secondary magnetic field in the rotor. ebm-papst has pioneered the development of EC motors and fans, which can be connected directly to an AC mains supply rather than a separate DC power supply, making them easy to retrofit as a replacement for inefficient AC fans. Watch the video to learn more.

FanGrids for Operational Reliability

radipac fans fangrid modular solution ebmpapst SEA

The modular FanGrid system is flexible and efficient. The fans operate in parallel, which ensures a high level of operational reliability; if one fan fails, the other fans compensate for the missing air quantity.  Watch the video to learn more.

Applications & Case Studies

AHU Air Handling Unit

Air Handling Units: An air handling unit (AHU) is a piece of equipment that circulates the air as part of a heating, ventilation and air-conditioning system. It is usually a large metal box that contains filters, cooling coils and fans. Depending on the needs of the building, the size of the AHU will vary.

Case Study - 40% in Energy Savings (Singapore)

Case Study - 40% in Energy Savings (Singapore)

Project Background
Application
Results
This commercial building houses more than 3,000 staff and accommodates most of the bank’s technology, operations and support functions with its open concept workspaces and stylish facilities such as a state-of-art cafe, 24-hour gym and dance studio. An airy and comfortable atmosphere within the building is crucial. As the building had been operating for a decade, the conventional AC belt-driven fans in AHUs were not efficient enough. It was clear to the facility management that all the AHUs needed to have a major overhaul.
After learning the benefits of EC fans, the building’s management decided to test out the energy efficiency level of EC fans and retrofit one AHU for a start. In one AHU, two RadiPac EC fans were installed to replace the end-of-life AC fan.
After retrofitting the fan system, power consumption of the AHU is reduced by approximately 40% with the required airflow maintained. In addition, it is observed that EC fans provide more uniform airflow and even air distribution. The results of this trial implementation highly impressed the facility management. Hence, the management made the decision to refurbish all the 70 AHUs with ebm-papst EC RadiPac fans. In total 140 RadiPac fans were installed in the building replacing 70 old AC fans.
AHU Case Study Bank
AHU Case Study Bank
CRAC ebmpapst SEA

CRAC Unit: A Computer Room Air-Conditioning (CRAC) Unit provides precise and constant temperature level in data centres. To prevent malfunctioning of critical infrastructure, it is absolutely critical that fans in CRAC units are reliable.

Case Study - 40,000€ less on Annual Electricity Bill (Sweden)

Case Study - 40,000€ less on Annual Electricity Bill (Sweden)

Project Background
Application
Results
Thirty meters beneath Stockholm’s tranquil Södermalm district is one of the most secure – and extraordinary – data centres in the world. In a retired fallout shelter called Pionen, data centre operator BAHNHOF stores its customers’ data behind steel doors that are 50 centimetres thick. Previously, this James-Bond-inspired data centre utilised inefficient belt-driven AC fans in their CRAC units. ebm-papst Sweden was tasked to modernise Pionen’s ventilation system.
In the upgrade, the CRAC units were retrofitted with ebm-papst’s EC centrifugal fans, also known as the RadiCal (Fig. 9). These are low-pressure fans with backward-curved blades.
In total, the upgrade saved BAHNHOF 275 megawatt-hours of energy annually. It spends about 40,000 euros less on its annual electricity bill. In addition, there is no longer a need to conduct frequent maintenance as the EC fans do not use a belt-driven system. With this upgrade, not only did BAHNHOF save on operation costs, but they also took a step forward in keeping their operations as ecofriendly as possible.
CRAC Unit Case Study Sweden
Cooling Tower

Cooling Towers: A cooling tower is a heat rejection device, which extracts waste heat to the atmosphere though the cooling of a water stream to a lower temperature.

Case Study - Quiet, Efficient and Reliable (Germany)

Case Study - Quiet, Efficient and Reliable (Germany)

Project Background
Application
Results
To ensure that packaged drinks arrive delicious on the supermarket rack, the cooling must be done right during filling. At Refresco, cooling towers from Krones make sure conditions are ideal. Krones and ebm-papst collaborated to design these custom made cooling towers. ebm-papst provided AxiBlades with special corrosion protection.
As soon as the temperature changes to a minimal extent, the power of the fans that temper the water by supplying air is automatically adjusted. This means that the required power is always available, while the customer benefits from less noise and significantly reduced energy consumption. So that the system functions as required, the fans fitted need to be precisely controlled. They are an essential component of a cooling tower. Thanks to EC technology, the fans can be steplessly powered up and down, thereby always providing demand-based cooling capacity.
The advantage of multiple installed fans is definitely process reliability. If one fails, the others can be easily ramped up and the cooling capacity maintained. The bonus in terms of reliability is also evident. Refresco needed systems that run with complete reliability, guarantee the optimum quality of their products, and fit their sustainability strategy.”
Cooling Tower Case Study
Condenser

Condensers: In air-cooled condensers, the heat from the gaseous refrigerant is transferred to the ambient air. Axial fans are usually used to direct air at the fins of the heat exchanger in the condenser, dissipating the heat. In this process, the refrigerant is cooled down to such an extent in the condenser that it condenses.

Case Study - saved Mark & Spencer 500,000 pounds (United Kingdom)

Case Study - saved Mark & Spencer 500,000 pounds (United Kingdom)

Project Background
Application
Results
Marks & Spencer has some 960 branches, of which 615 are food-only outlets. M&S is looking to become more energy-efficient, and as part of that undertaking is gradually fitting out its buildings with energy-saving technology.
The condensers on the store roofs used to be major energy guzzlers, because they used older-style AC fans. M&S approached ebm-papst to find a more efficient solution.
The switch to HyBlade 910 mm diameter EC axial fans with AxiTop diffusers will save M&S more than 500,000 pounds. That means the investment in the upgrade is projected to have paid off within less than five years.
Condenser Retrofit Case Study

More on Retrofitting

The Dos & Don’ts for Ventilation Fan Retrofit
Retrofit Stages: From Site Survey to Site Rollout

The Dos & Don’ts for Ventilation Fan Retrofit

When you handle a retrofit project on ventilation fans, it is important to know what one should definitely do, and what not to do. Read the article here.

Retrofit Stages: From Site Survey to Site Rollout

Stage One: Site Survey
Get in touch with us and we will arrange a free physical survey of your existing equipment to see what you currently use and what you would like to achieve. There is no cost involved in checking the feasibility of the project. Our wide experience of all types of systems means we can quickly give you advice on a possible solution, including potential savings and a payback period.

Stage Two: Estimated Savings
After our initial feedback, we will consider your needs in more detail and provide an estimate of the potential savings in energy consumption financial cost. We will also indicate the cost of fan installation and the payback period.

Stage Three: Trial Installation
We have confidence in our estimates but do not expect you to accept them without question. Usually we will recommend an initial trial installation to confirm the figures.

Stage Four: Site Rollout
Following a successful trial installation, you will have all the information you need to implement a site-wide upgrade.

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