The transformation of Melbourne’s Yarra River precinct to a high class business centre and popular tourist destination is complete with the opening of Hilton Melbourne South Wharf.

The five star hotel and adjoining new Melbourne Convention Centre form part of a new development known as South Wharf, which extends the riverside esplanade from Southbank to Docklands. The buildings were designed by architects Woods Bagot and NH Architecture for the Plenary Group and are bringing new life to the Yarra.

Allstaff Air-conditioning Construction Manager Mike Parry said the decision to integrate the Hilton with the Melbourne Convention and Exhibition Centre (MCEC) had been a clever one. Hotel guests can access the MCEC without having to leave the complex, and when the conference is over they are in the heart of Melbourne’s newest entertainment and dining district.

Mike said the architects had drawn inspiration from the Yarra River and this was evident with the extensive use of timber throughout the building, and the earthy tones.

All guest rooms and suites have panoramic views of either the Yarra River and city skyline or Port Phillip Bay. It comprises 364 contemporary styled rooms over 13 levels with a further 30 deluxe suites over two levels. Two levels of luxury serviced apartments are also available for guests looking to experience

home away from home.

Fantech supplied a range of axial, centrifugal and mixed flow in-line fans and a number of relief cowls for the hotel.

“Like most hotels, each of the 396 rooms has an in-ceiling fan coil unit with controlled tempered outside air supplied to each room

on the 19 floors. The central plant room is located on the 20th floor providing the central chilled water and heating water systems,” Mike said. “The corridor spaces were very tight and a lot of co-ordination was required to integrate all the services in the allocated space.”

But the Hilton is so much more than a place to stay. Michelin-starred chef Ramon Freixa oversees the running of the hotel’s fine dining restaurant, Nuevo 37, and riverside bar Sotano Wine and Tapas. His Spanish influence is obvious in both the menu and décor, and even in the restaurant’s name – ‘neuvo’, meaning ‘new’ in Spanish and 37 referring to Melbourne’s latitude.

In Sotano, the traditional Spanish cellar is a striking feature, with 2,500 wine bottles suspended from the 7m ceilings. Foodies are equally impressed by the preserved meats and cheeses hanging in the charcuterie.

The Hilton brand is synonymous with luxury and impeccable service, and the Hilton Melbourne South Wharf is no exception.

...the architects had drawn inspiration from the Yarra River

Hilton brings a new height in luxury

April 2010Newsletter Number 67

Technically SpeakingThe how and why of fan vibration isolationIn mechanical systems, small imbalances within any rotating equipment will cause vibration oscillation. If this equipment is fixed directly to a building structure, the oscillation will propagate down the structure and can cause unacceptable levels of vibration and noise in the building. Vibration isolation can be accomplished by supporting the equipment on resilient spring or rubber mounting elements, which compress under the equipment weight. This article will focus on the requirements of vibration isolation for fans.

The primary purpose of vibration isolators is to separate the vibration of the fan from the rest of the system, preventing it from transmitting through the structure and causing unwanted structural vibration and noise.

Noise is a product of sound pressure waves induced by vibrations. Using steel spring anti-vibration mounts alone to isolate the vibration may still lead to vibration noise being transmitted through the mounts and hangers themselves. To prevent these problems, spring mounts are fitted with a resilient-rubber isolating pad. Care must be taken to prevent this pad being bridged if mounts are

bolted to the structure.

In the case of anti-vibration hangers, care needs to be exercised to ensure that the hanger rod

is straight and does not touch the metal hanger housing as this could create a short circuit and allow the fan vibration to enter the structure.

Importance of static deflectionThe degree of isolation achieved is directly related to the amount of compression of the anti-vibration mounting; this is referred to as static deflection. The greater the static deflection achieved (without compressing to solid), the better the resulting vibration isolation.

The degree of vibration isolation is usually expressed in terms of “isolation efficiency”. When determining the level of isolation efficiency that may be acceptable, consideration must be given to the following:

Fan type, operating weight and speed•

Magnitude and nature of the vibrating forces•

Restrictions on fan motion•

Location of the fan in the building structure•

For example, an isolation efficiency of 80% is normally satisfactory for a 5kW machine located in the basement, but totally inadequate for a 100kW machine installed on a flexible upper level floor, particularly when adjacent to valuable office or residential accommodation. In this case, an isolation efficiency close to 97% would be recommended, which indicates that only 3% of the vibration is transmitted between the equipment and the structure. In general, non-critical areas such as factories and workshops will require equipment isolation efficiency of approximately 80% while in critical areas such as multi-story buildings and hospitals require an isolation frequency of 98%. A higher efficiency solution usually involves higher precision and cost.

Disturbing Frequency, rev/sec (Hz)Static

Defl

ectio

n,mm

5 6 8 10 20 30 40 50

200

100

60

40

20

10

64

2

1

0.60.4

0.25

50%

0%

70%

80%

90%

95% 97% 98% 99%Isolationefficiency

Generalapplications

Criticalapplications

Non-critical applicationsArea of resonance

TO BE AVOIDED

In the cto be

is shacith

The size of spring and rubber mounts for fans are based on the fan’s weight and the static deflection per mount. An appropriate static deflection can be selected to give the required isolation efficiency. For example, a fan with a rotational speed of 600rpm (10r/s) (denoted

by “Disturbing Frequency”, rev/sec - Hz in Figure 1) would require a spring with a static deflection of 50mm to achieve an isolation efficiency of 95%, but for 90% isolation the static deflection would only need to be 25mm.

Using vibration mountingsSome simple guidelines for successful vibration control are provided below:

1 Mounting support points and load ratings should be selected so that the static deflections of all mountings supporting a machine are as uniform as possible.

2 Unrestricted movement of resiliently mounted equipment is essential for effective isolation.

Ensure that adequate clearance is maintained around • the installed equipment, particularly underneath it, to permit free movement - especially where high deflection mountings are used.

All connections to resiliently supported equipment should • themselves be flexible. As well as restricting equipment motion, any fixed connection can offer a direct path for transmission of vibration to the surrounding structure, by-passing the isolation system.

3 Top-heavy machinery, especially when mounted on a narrow base, can become unstable if mountings are located too close to each other. Such instability can be avoided by using outrigger brackets which space the mountings further apart and raise the mounting location points closer to the vertical centre of gravity of the equipment.

4 A rigid base is essential for resiliently supported equipment to avoid misalignment of drive components. Any flexibility in the machine base should be eliminated by the addition of steel stiffeners or use of a concrete inertia base.

5 Ductwork and ancillary equipment (eg. sound attenuators) should not impose dead loads on the resiliently mounted fans. Where this is not possible, their weight should be separately supported or added when calculating the total weight.

Summary: In modern building construction lighter and inherently more flexible structures are typically used. At the same time modern building services use powerful equipment and may often be installed in upper level plant rooms. Fan vibration can create a major problem in such structures, where it is transmitted through the building, causing unwanted noise and structural movement. The result can be a nuisance or at its worst lead to catastrophic structural failures. With the use of vibration isolators in the form of spring or rubber mounts, appropriate isolation between mechanical equipment and the surrounding structure can be successfully achieved.

Fig 1: Isolation Efficiency Chart.

XL Series Spring mount in an inverted hanging installation

With Daryl Choong

With Stuart Bryson

Customers come first – and nobody knows that better than Fantech. The company has built its reputation as a leading fan manufacturer and distributor by listening to customers and incorporating that advice into improving products and services.

External Sales Engineer Thida Kao certainly understands the importance of listening to customers. She has recently been promoted to Victorian Major Projects Co-Ordinator and says she enjoys the excitement of meeting new customers and helping ensure their projects run to schedule and that issues that arise are sorted out quickly.

Thida has a Bachelor of Chemical Engineering from Swinburne University and has been at Fantech for almost 10 years after spending the first three years of her career working for an instrument and sensor supplier.

“I get a lot of satisfaction from advising customers of best practices and presenting new energy efficient solutions,” she said. “I thrive on the challenge of ensuring we do our part to keep projects running smoothly.”

Peter Cotterell will be supporting Thida and other State Project Co-Ordinators, but in his new role as National Business Development Coordinator he will be working with clients to ensure they consider all options and their various benefits.

“We hope to offer better solutions and iron out a lot of potential problems before they develop. This in turn will make the project run smoother and allow the various stages of it to progress with less delays and greater efficiency.”

New roles to service customers better

Fantech says thanks

Tip No.7Performing an acoustic analysis (Part one)A useful feature in the Fantech Selection Program is its ability to perform a rapid acoustic analysis. This will give you a good idea of the ‘real-world’ sound level of a fan and determine if a silencer is required.

To begin you must first either select a fan (as detailed in TechTalk #61) and click Acoustic Analysis, or click the Acoustics button on the opening screen and manually enter Sound Power Levels.

With the Sound Power Levels set, click the Duct System Effects. Input is required for the ductwork, bends and outlet reflection, which all affect the sound power. If the system has acoustic lined duct or bends, an additional dialog box lets you enter the specifics. If there are any other system components which may have an effect, such as bends with turning vanes, other fans or dampers, these should also be entered under Additional Effects.

We now have the resulting sound power leaving the duct system into the room. Next issue we will convert this to a sound pressure level.

About 200 contractors, consultants and suppliers gathered at the spectacular Melbourne Convention and Exhibition Centre (MCEC) to celebrate Fantech’s 37 years of service.

The annual function is a time for sharing a drink with old friends and meeting new people in the industry. It is a time when Fantech says thank you.

In his welcoming address Managing Director Chris Ogilvy paid tribute to customers, agents, suppliers and staff in what had been a challenging 12 months.

“The Melbourne Convention and Exhibition Centre is a magnificent building,” he said. “It is not only a major highlight on the Yarra River, but also showcases to the world what Australia can achieve in innovative design and sustainability.

“Fantech is proud to have played a role in this project and we will continue with our own pursuits of

excellence to bring you new and innovative products and systems that meet the growing demand for energy efficiency.”

James L Williams Project Manager Mike Reid went on to wow guests with some inside facts on the mechanical services for the building. Mike said a major feature of the building was the under floor displacement air system in the 5000 seat plenary hall. “It is the first time such a large scale system has been installed. Another first was the large scale full refrigerant recovery system for chillers,” he said.

With more than 300 individual air handling systems and 30 kilometres of pipework supplying over 5,000,000L/s of air, this was a very large project. Furthermore, installation of standby fans, pumps and air handling systems means that the system is reliable and when at full capacity, the 22,000 visitors will be in a comfortable environment, he said.

Fans by Fantech Product Selection Program

Twenty years ago Richard Wild saw an opportunity for a specialist air conditioning contractor to focus on refurbishment and fit out work.

He established Wild Air Conditioning in East Brisbane and along with young trainee Scott Walker began to make a name for himself. Today the company employs 13 permanent staff in the Brisbane office, and has grown to become the preferred contractor for a number of CBD office towers and large fit-out companies as well as small to medium design and construct projects.

A second office was opened in Artarmon, just north of Sydney in 2005 and is run by Peter Van Vliet. As a result Wild Air has now established itself in the Queensland, New South Wales and Victorian markets.

Eight months ago Regan Jones joined the company as the Queensland General Manager in preparation for the retirement of Richard Wild. And while Richard’s retirement means that he has slowed down considerably, he still has an active interest in the company and can often be seen around the Brisbane office.

Regan said there was a healthy work ethic with employees who

F

Thida Kao & Peter Cotterell

The MCEC...showcases to the world what Australia can achieve in innovative design and sustainability.

Product NewsA school classroom is a good example of where a DCV system can be used in conjunction with a CO2 sensor. When the room is empty and the CO2 level is at 500ppm, the DCV has been set to run the fan at 20% speed. As the room fills with students and the CO2 level increases to 1500ppm the fan will run at 100% speed. The ability for this fan to run at full speed only when required can dramatically decrease energy consumption.

Installation of EC motors is quick and simple with less wiring/cabling and significantly less labour. It has many of the filters and protection mechanisms needed to ensure the fan is working properly.

Once installed, the DC brushless motor operates much cooler than an AC motor, extending the bearing life and overall longevity of the motor.

Fantech utilise EC technology in a number of their product ranges including the PowerLine EC series of in-line centrifugal fans and the roof-mounted Gamma EC and GL Gamma series. The PowerLine EC is also available with the DCV system.

The introduction of the BCA 2010 with the additional requirements on energy efficiency will lead to only fans with EC motors being acceptable for certain specifications.

With Kerry Dumicich

EC technology takes offHighly efficient electronically commutated (EC) motor technology incorporated into a Fantech fan is helping the building services industry to meet the increasing demand for energy efficient products. This ultimately helps to reduce energy costs and greenhouse gas emissions.

An EC motor uses electronics to periodically reverse the current direction between the rotor and the external circuit so that a DC motor can be plugged into a standard 240V supply. As the electronics control the ramp up speed, in-rush current is kept to a minimum which means that the fan never draws more than the rated full load amps.

But it is the combination of a highly efficient DC motor and on-board speed control that reduces noise and leads to massive power savings. As an example, by running EC fans at ½ speed, power consumption is reduced by nearly 87.5% and noise levels are 16dB lower.

The sophisticated electronics of the EC motor responds to 4 to 20mA or 0 to 10 volt signals which means it can be factory programmed to work with a large range of sensors (eg. temperature, air volume, air pressure, humidity, air velocity, CO2, CO). The signal will then speed up or slow down the fan according to its requirements. Fans with EC motors can also be controlled using a Building Management System (BMS).

Fantech has recently added extra functionality to the EC range by way of a unique controller known as the Demand Control Ventilation (DCV) system. This controller uses the feedback from sensors to automatically control the amount of ventilation required. The great advantage of this intelligent system is that the parameters for each of the sensors have already been preset to handle typical applications, thus reducing the need for installers to have specialised control knowledge.

Twenty years ago Richard Wild saw Twenty years ago Richard Wild saw an opportunity for a specialist air an opportunity for a specialist air conditioning contractor to focus on conditioning contractor to focus on refurbishment and fit out work.refurbishment and fit out work.

He established Wild Air Conditioning He established Wild Air Conditioning in East Brisbane and along with in East Brisbane and along with young trainee Scott Walker began to young trainee Scott Walker began to make a name for himself. Today the make a name for himself. Today the company employs 13 permanent staff company employs 13 permanent staff in the Brisbane office, and has grown in the Brisbane office, and has grown to become the preferred contractor to become the preferred contractor for a number of CBD office towers for a number of CBD office towers and large fit-out companies as well and large fit-out companies as well as small to medium design and as small to medium design and construct projects.construct projects.

A second office was opened in A second office was opened in Artarmon, just north of Sydney in Artarmon, just north of Sydney in 2005 and is run by Peter Van Vliet. As 2005 and is run by Peter Van Vliet. As a result Wild Air has now established a result Wild Air has now established itself in the Queensland, New South itself in the Queensland, New South Wales and Victorian markets.Wales and Victorian markets.

Eight months ago Regan Jones joined the company as the Eight months ago Regan Jones joined the company as the Queensland General Manager in preparation for the retirement of Queensland General Manager in preparation for the retirement of Richard Wild. And while Richard’s retirement means that he has Richard Wild. And while Richard’s retirement means that he has slowed down considerably, he still has an active interest in the slowed down considerably, he still has an active interest in the company and can often be seen around the Brisbane office. company and can often be seen around the Brisbane office.

Regan said there was a healthy work ethic with employees who Regan said there was a healthy work ethic with employees who

were encouraged to pursue professional were encouraged to pursue professional development and work together as a team. development and work together as a team. “The company’s first employee, Scott, is still “The company’s first employee, Scott, is still with us, and our employees have developed with us, and our employees have developed strong ownership of the Wild Air brand.strong ownership of the Wild Air brand.

“We work hard to be a contractor of choice “We work hard to be a contractor of choice in the mechanical services industry and in the mechanical services industry and we are proud of our relationships – but we are proud of our relationships – but we never take them for granted,” he said. we never take them for granted,” he said. “Furthermore, we have aligned ourselves “Furthermore, we have aligned ourselves with quality material suppliers and with quality material suppliers and installers, in order to confidently offer installers, in order to confidently offer our customers a guarantee of quality and our customers a guarantee of quality and consistency.consistency.

“Happy customers and employees are the “Happy customers and employees are the keys to continued success for us.”keys to continued success for us.”

Wild Air Conditioning recently completed Wild Air Conditioning recently completed two levels of a brand new building on two levels of a brand new building on Coronation Drive on the Brisbane River for Coronation Drive on the Brisbane River for superannuation providers Sunsuper. It was superannuation providers Sunsuper. It was

a 5 Star Green Star project. “We were handed a clean skin with a 5 Star Green Star project. “We were handed a clean skin with base building mechanical. The job had to be finished within a base building mechanical. The job had to be finished within a tight time frame and in six weeks we completed all additions tight time frame and in six weeks we completed all additions and alterations to the base building mechanicals and installed and alterations to the base building mechanicals and installed new air conditioning and mechanical ventilation,” Regan said.new air conditioning and mechanical ventilation,” Regan said.

Fantech congratulates Wild Air on 20 years in the business.Fantech congratulates Wild Air on 20 years in the business.

Brisbane company wild about refi ts

PowerLine EC Series Centrifugal In-Line Fan with DCV

ARBS 2010 will bring together over 230 exhibits and more than 10,000 visitors from the HVAC and building services industries.

Fantech Marketing Services Manager Frank Cosentino said: “ARBS is a fantastic opportunity to see the latest breakthroughs in new technologies and innovative product design”.

Fantech’s strong commitment to energy efficient products and technologies will be the main focus of their stand. Frank said the demand for energy efficient systems within a building continues to grow as companies work towards reducing energy costs and greenhouse gas emissions.

“Variable speed drives (VSDs) are an important part of such systems as they allow the fan speed to be controlled according to its need,” he said.

“Fantech now provides the high quality Vacon range of drives throughout Australasia and visitors to ARBS will see it control the speed of a Fantech JetVent Impulse car park fan. JetVent has revolutionised car park design by reducing or eliminating the need for ducting through strategic placement of Impulse fans. This ensures a continual air movement in a particular direction,” he said.

Fantech has recently introduced Demand Control Ventilation (DCV) which automatically varies the fan speed according to the environmental conditions of a room. “This very efficient, smart technology works in conjunction with a number of sensors and is ideal for spaces where people enter and exit during the course of the day,” Frank said.

The DCV range includes PowerLine EC duct-mounted centrifugal fans and Eco-Speed axial duct-mounted fans – the operation of

Compost given a breath of fresh airA series of new Fantech contra-rotating fans are breathing fresh air into Jeffries, one of South Australia’s compost, soil and mulch experts.

“Oxygen is key to producing quality compost,” Jeffries’ Operations Manager Martin Jeffries said. “The beneficial microbes that break down the raw ingredients during the composting process are aerobic and require more than 5% oxygen in the air. When oxygen levels fall, the aerobic microbes die and are replaced by anaerobic ones, and that’s when odours develop.

“In the past we had a 400 horsepower diesel powered mobile turning machine that would lift and turn the compost to replenish oxygen within the compost piles. The machine would work 10 hours a day, six days a week and we knew there had to be a more economical alternative,” Martin said.

Lucid engineering were contracted to find a solution. Mechanical Services Engineer Gerard Mignone said they eventually settled on a process that included contra-rotating fans from Fantech.

“Compost is relatively dense so we needed a fan that could produce a high static pressure,” Gerard said. “By having a two-stage fan assembly with contra-rotating impellers, we could increase the pressure to about 2.4 times that of a single-stage fan.”

Seasonair installed a series of ductwork beneath the 38 mulch piles. Each 50m run had two fixed channels 2.5m apart, just beneath the surface that housed the duct. A 310mm diameter contra-rotating fan forced air out of the duct holes and into the bottom of the mulch pile.

Seasonair’s Contracts Manager Tristan Luck said the job was quite complex. “We had to try different fans to get the right oxygen levels in the piles. Jason Kelly at Fantech’s Adelaide office was extremely helpful and always delivered the fans on time.”

Martin is very happy with the final result. “We had been turning each pile six to eight times during the composting process, but the fans are doing such a great job that we now only turn them once,” he said.

“Our energy input is much lower so our bills will be less and so is our carbon footprint. The bonus is that we are also getting a higher quality product.”

Ryde

... the energy effi cient productsand technologies will be the main focus of their stand.

C

both these fans will be demonstrated at ARBS.

Frank said efficiency gains were also being made through heat recovery technology where energy is recovered from an exhaust system. “The MODUtherm ER range of air handling units are designed and manufactured by Fantech’s subsidiary company Air Design and will also be displayed at ARBS,” he said. “At the heart of these units are German made, high quality Klingenburg rotary or plate heat exchangers, which are both Eurovent and ARI certified.”

The introduction of a new Australian Standard (AS3959:2009) for construction of buildings in bush fire prone areas has seen Fantech develop a specialist range of galvanised steel fans. The ARBS stand will feature two of these – the Ezifit Thru Roof fan designed to suit bathrooms, toilets, kitchens and range hoods; and the GL Gamma series for commercial kitchen and exhaust applications.

ARBS is held at the Sydney Convention and Exhibition Centre from 12-14 April 2010. Fantech will be on stand 348 and invites visitors to come and find out more information on the products mentioned above or any other product from the Fantech range.

ARBS 2010

Fant

ech

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AustraliaAdelaide (08) 8294 0530Albury (02) 6025 1866Brisbane (07) 3299 9888Canberra (02) 6280 5511Darwin (08) 89470447Launceston (03) 6344 6888Melbourne H.O. (03) 9554 7845 This number has changed. Please update your records.Melbourne CBD (03) 9696 3044Geelong (03) 5229 0188Newcastle (02) 4961 6088Perth (08) 9209 4999Sydney (02) 8811 0400Sydney CBD (02) 9698 8130Sydney South (02) 9153 6005Townsville (07) 4775 5222Wollongong (02) 4226 5133New ZealandAuckland H.O. (09) 444 6266Christchurch (03) 379 8622Wellington (04) 566 0532Asia For agents in the Asian regioncall (603) 5121 4453 or visit www.eltafantechasia.com

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New development makes

RydeRyde a ‘top city’The northern Sydney suburb of Ryde is well on its way to getting a new town centre. Known as Top Ryde City, the new development features 80,000 square metres of retail space, commercial spaceand residential apartments above the shopping precinct.

Optimus Construction Manager Mark Crossingham said it was a huge project that began in September 2007, when Bovis Lend Lease was contracted to project manage, design and build the first stage of the development.

“The old shopping centre, which had past its lifecycle date and required a major upgrade, was demolished by February 2008,” Mark said. “In its place will be four levels of retail with 200 specialty stores and major chains Myer, Big W, Woolworths, Aldi and Franklins. A further two levels are dedicated to lifestyle with cinemas, a library, child care facilities and gym. Three levels of basement car-parking will service the complex.”

Optimus were contracted to provide mechanical services for the project and dedicated a major project team comprising three project managers, three engineers, one site manager and two site supervisors to the project. At its peak they had an additional 32 sheetmetal workers, 16 plumbers, 10 laggers and 15 electricians working at Ryde.

“For a project of that size we needed to have suppliers that we were confident could supply product on time and to budgetary constraints,” Mark said. “Fantech has been a favourable supplier to Optimus for the past 15 or so years and we knew they could deliver the large amount of equipment needed.”

There has been a series of handover dates, and in November 2009 Stage 1 was opened. To gain occupancy the centre required 38 air handling units and fan coil systems, 19 stair pressurisation systems, 39 miscellaneous exhaust systems, 7 car park exhaust fan systems,

9 smoke exhaust systems, 11 car park supply systems, 2 tunnel exhaust systems and 2 kitchen exhaust systems to be operational.

“Co-ordination with other services (electrical, hydraulics, structural) has been a major challenge,” he said. “For example, installation of the central energy plant was hampered by structural constraints and took 8 weeks. Other plant equipment including the essential systems, cooling towers and an air cooled chiller for the majors, need to be temporarily installed and moved to a final position once the structure is finished.”

Stage 2 of the development opened on 20 February 2010 followed by Stage 2a,b on 16 March. The final opening is due in August 2010.

...it was a huge project that began in September 200077