Tag Archives: CIBSE Ireland

Heat Merchants Hosts All-industry Forum at Croke Park

Christy Kane with Alan Hogan, Managing Director, Heat Merchants Ireland.

Christy Kane with Alan Hogan, Managing Director, Heat Merchants Ireland.

Heat Merchants Group inaugural construction industry conference and trade exhibition at Croke Park Conference Centre early in November was sponsored by Bord Gáis Energy and supported by CIBSE Ireland and OFTEC.

The conference brought together a panel of industry experts to discuss the latest in renewable energy technology, water conservation measures and best practices in construction. Over 200 engineers, architects, developers and energy consultants gathered to hear expert advice from leading manufacturers. These included Panasonic, SolarWorld, Kingspan, Baxi, Firebird and Sprue.

Recent amendments to the Building Regulations governing the use of renewable energy sources and safety in the installation of heat-producing appliances in domestic buildings were reviewed. In addition to presenting technical papers, representatives from the supply partners present also manned pop-up stands that were located around the perimeter of the outer room where the food, teas/coffees were served.

Alan Hogan, Managing Director of Heat Merchant Group said: “Environmental sustainability and resource efficiency will continue to be a key driver of growth in our industry and we want to use this opportunity to share knowledge and experience from some of the world’s leading manufacturers. This will help the industry to upskill and utilise the most innovative technology available, especially in the face of the new building regulations and changing customer sentiment”.

CBSE Ireland Annual Lunch Completely Booked Out!

Gerard Hosford, guest speaker at the forthcoming CIBSE Annual Lunch to be held in Dublin on 5 December 2014

Gerard Hosford, guest speaker at the forthcoming CIBSE Annual Lunch to be held in Dublin on 5 December 2014

The forthcoming CIBSE Ireland annual lunch has seen an unprecedented demand for tickets with the result that the room capacity has been exceeded so no further bookings can be accepted. Venue is the Alexander Hotel in Dublin and the date is Friday, 5 December.

The CIBSE Ireland annual lunch is now the main networking event for the building services sector, providing a forum for those involved in the industry to renew old acquaintances, exchange view and opinions, discuss issues of importance, and socialise in a very relaxed and celebratory atmosphere.

As is customary in recent years, the guest speaker is an Irish engineering graduate who has forged a successful professional career abroad. Gerard Hosford, a graduate of Cork IT, is this year’s speaker. Following completion of a three year full-time Bachelor of Engineering in Building Services Engineering Degree (BEng) at CIT, he moved to Newcastle upon Tyne to complete his Honours Bachelor of Engineering Degree BEng (Hons) at Northumbria University. 

He currently works as Senior Mechanical Engineer with Patrick Parsons Consulting Engineers in Newcastle upon Tyne, England, and is also the Chairman of CIBSE North East Region in England and has lived there for almost 10 years.

 

 

 

TGD-030 Guidance Document Changes — Implications of revised guidelines on boiler selection (Part 2 of 2)

David Doherty, Vice-Chairman CIBSE Ireland and Projects Manager, Hevac

David Doherty, Vice-Chairman CIBSE Ireland and Projects Manager, Hevac

Section 11.2 of the revised changes to Technical Guidance Document TGD-030 covers boiler selection specification. The revised issue now reads: “where natural gas supply is available, suitably-sized aluminium or stainless steel modulating boilers shall be provided”. The key wording here is aluminium. This change now allows for more competitive and efficient condensing boiler plant to be considered.

Aluminium has a number of favourable characteristics. The alloy is perfect for casting of boiler bodies with complex shapes which allow increased surface areas for maximum heat transfer with low water volumes.

As aluminium conducts heat better, in choosing this material, we can significantly reduce the exchange surfaces to achieve the same output transmission to the heating circuit with a smaller exchanger. At an equivalent output, aluminium heating bodies are therefore significantly more compact. Aluminium is three times lighter than stainless or copper.

The compactness of aluminium exchangers – combined with its excellent thermal properties – allows mechanical contractors to take advantage of significant weight reductions with the same amount of power.

Aluminium silicium is extremely flexible, which allows considerable temperature differences (up to 30k) between the boiler flow-and-return. There is no risk of metal fatigue caused by repeated thermal shocks throughout the heating season which can lead to breakage of components.

The thermal conductivity of aluminium (99.9% purity) is 237 (W.M-1.K-1 @ 20°C) while stainless is 46 (W.M-1.K-1 @ 20°C). This represents a greater heat transfer by five times that of stainless steel. This in turn allows for smaller exchangers and boiler sizes. The density of steel is more and therefore weighs more. This can become an issue on large boiler plant for installation and building structural loads.

The construction of stainless steel heating bodies involves weld assemblies, folds and pressed parts which are susceptible to the constraints relating to the operation of the boiler. The changes in temperature relating to the operation of the boiler are the root cause of stress in materials. These manufacturer welds and lock seams can be a weakness in the exchanger assembly. An aluminium boiler does not incorporate any folds or welds.

Alloy resistance to acidic conditions is critical, especially during condensing mode. Aluminium can resist these corrosive conditions due to its ability to become passive. On contact with water or oxygen, a non-porous protective layer of aluminium oxide is formed naturally. This is alumina, or the passive layer. It is this layer that makes the alloy suitable to the condensing conditions of modern boilers.

As the boiler is not susceptible to thermal shocks, the boiler can have low return temperatures. thus allowing it to condense and therefore recover heat. During condensing operation, the condensate run-off flows down over the heat exchanger. This acts as a method of self-cleaning by preventing the accumulation of any residues and non-combustible materials on the exchanger and, in effect, continuously washes the exchanger.

In order for any heating system to operate properly clean neutral water is ideal. The addition of an inhibitor to the system at commissioning stage will keep any remaining grit in suspension and prolong the life of the system and the boiler. Proper system flushing to rid the pipes of filings, dirt or grit is recommended.

Water quality parameters are measured by pH, hardness, conductivity and chloride levels. These levels will vary geographically from county to county. The table shows why it is necessary to include a protective inhibitor. Steel and cast iron corrode easily on contact with water, as the pH of the water network is not naturally compatible with these alloys. Conversely, aluminium presents good resistance to neutral or even acidic pH, and is one of the metals most resistant to corrosion due to its broad tolerance range.

In conclusion, aluminium silicium boilers have a number of positive characteristics – including corrosionresistance, longevity, ductility and conductivity – and these are prime considerations when specifying or making boiler selections.

Technical Guidance Document TGD-030 — update and changes summary (Part 1 of two articles)

David Doherty, Vice-Chairman CIBSE Ireland and Projects Manager, Hevac

David Doherty, Vice-Chairman CIBSE Ireland and Projects Manager, Hevac

TGD-030 Mechanical and Electrical Building Services Engineering Guidelines covers primary and post-primary schools and its scope is to offer better guidance to school authorities, and to aid mechanical/electrical engineers in design. TGD – 030 should be of interest to building services consultants, contractors and suppliers involved in schools works and, in particular, the current summer works scheme underway at schools throughout the country.

The document covers various design features including natural ventilation, boiler plant and rainwater harvesting. This publication of the latest revision follows consultation and communication between the department and building professionals, designers and suppliers/manufacturers. It has been widely welcomed and endeavors to future-proof the

M&E services provided in schools. Key changes include:

Daylight Distribution — Average daylight factor for rooms remains at a minimum of 4.5%. The document notes that: “Higher levels just lead to unnecessary heat gains and losses”;

Ventilation — Natural ventilation is to be considered where possible via permanent wall vents and windows. The guideline notes that: “good quality ventilation is critical to the functioning of a teaching space”. The latest revision highlights thermal comfort levels. The maximum time a room can exceed 25°C is 51.85 hours. However, this is an absolute maximum and design team members should endeavour to maximise the thermal comfort potential;

Blinds — The specification on blinds now includes light transmission values 9 – 12%; solar absorption 17-20%; openness factor 3 – 5%, depending on elevation. All blinds to be light and identical in  colour. Instructions on operation to be included to try reduce energy costs;

Access — The document draws attention to Part M Access & Use. It highlights sensible and thought-out locations for light switches, sockets and lift equipment. This is something every project tries to achieve through coordination and layout drawings;

Boiler House — Maximum plant room sizes are now detailed and linked to number of classrooms;

Boilers — Where natural gas supply is available, suitably-sized aluminum or stainless steel modulating boilers shall be provided. This allows for a more efficient selection, and the inclusion of modulating allows for better turn-down ratios on boilers. Weather compensation and three-port mixing valve arrangement with an outside sensor brings the specification up to date with modern wall-hung and floor-standing boilers;

Radiators — Radiator metal thickness, minimum 1.5mm. No fan assisted radiators allowed;

Controls — Clear instructions on heating controls now required;

Water Supply — Test point in boiler house now to be allowed for water sampling, in addition to a dosing point for commissioning and disinfection. The document highlights the requirement for drinking points as per TGD002 and mains water should not be piped to wash hand basins;

Rain Water Harvesting — A new sizing guide is now included for underground storage tanks. No mains water connection should be made to a tank. Anti-legionella requirements are highlighted along with rainwater tap labelling;

Water Services — Attention is drawn to national and international standards that minimise the risk of legionella;

Water Tank Ventilation — Cold water tanks are to be stored below 20°C. Consideration is drawn to stagnate water and calls on both architects and building services engineers to ensure risk of legionella is minimised. If passive ventilation is needed a duct to outside can be considered;

Sanitary Ventilation — All sanitary facilities, including en-suite classroom toilets, to be provided with background ventilation. Shower areas 15 l/s per shower. Toilets 6l/s per WC. En-suite bathrooms must contain an external window, in addition to a mechanical fan, with run-on timer controlled by light switch. Floor grilles and door transfer grilles should not be used with undercut doors and high level transfer grilles are preferred. All systems to be tested and commissioned in accordance with CIBSE commissioning codes;

Dampers — All dampers to shut off when fan not in use. A non-return damper to be provided on ducts of 150mm or less. Motorised dampers are required on larger duct sizes;

Power Distribution — Residual current breaker and overloads need to allow for heavyduty floor cleaning equipment. Lightning protection to be considered. Electronic surge protection required on incoming mains supply at mains switchboard;

Lighting — LED type fittings are to be considered for external, car park and security lighting. Payback of 10 years is required. According to CCTV Manchester, CCTV compatibility is required. On internal spaces, LEDs can only be used in corridor and toilet areas. Elsewhere, lighting power consumption levels of 2.5w/m2 per 100 lux shall be the maximum in all areas. Lighting detectors, plus operation instructions, also required.

Also, corridor lighting zones need to consider daylight influences and have local PIR controls alongside local switches. The document looks for commissioning and a re-visit 12 months after handover to ensure levels maintained;

Emergency Lighting — Installations are to comply with IS3217:Dec.2013. Economical solutions are to be considered with ceiling-mounted LED fittings rather than inverter driven packs. The DoES takes the view that a classroom is not a large assembly room. A single fitting will comply, allowing 0.5lux at floor level. Siting of lighting to consider routes and location of emergency equipment;

Communications — In public address systems, local volume control required in classrooms with special education needs. Regarding induction loop systems, the loop cable is not to be run in steel conduit or in the floor;

Fire Alarm Systems — Systems to comply with IS3218: Dec.2013. Open protocol type fire alarm systems only shall be provided in schools.

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The document concludes by outlining handover documentation and requirements for labelling in the control and operation of the equipment. For further information on all the DoE documentation – and to download the entire file – visit their website: www.education.ie/en/School-Design/ Technical-Guidance-Documents/

SDAR Journal 2013 official launch

Professor Gerald Farrell, Head of School of Electrical & Electronic Engineering, gave the welcoming address with Martin Shanahan, Forfas Chief Executive, formally introducing the Journal and linking it to opportunities in the green economy.

Professor Brian Norton, DIT President, responded and then Dr Kevin Kelly, Head of School of Multidisciplinary Technologies – and SDAR Journal Editor– spoke about the contents. Dr Mike Murphy, Dean of College of Engineering and Built Environment, closed the proceedings.

The SDAR Journal is now an annual research journal published jointly by CIBSE Ireland and the School of Electrical & Electronic Engineering in DIT, with Electric Ireland as the third sponsor. Up to now, papers have been mainly by Irish authors about Irish projects. Initially, the plan was to hear about the good, the bad and the ugly of the application of low-energy projects in the built environment in Ireland.

To a large extent that is still the main objective but for next year’s edition the publishers also want to encourage more of the SDAR Journal’s many international readers to submit papers. Indeed, this current edition includes the first international papers. One is a joint paper from Belgium and the UK on demand-controlled mechanical extract ventilation system, while the other is from a world-renowned UK expert on daylighting of buildings.

To submit abstracts for the SDAR Jurnal 2014 log on to http://arrow.dit.ie/sdar/

Sean Dowd elected Chairman CIBSE Ireland

Derek Mowlds, outgoing chair, congratulating Sean Dowd, the newly-elected CIBSE Ireland Chairman.

I am delighted and honoured to assume the chair of CIBSE Ireland and will endeavour to maintain the high standards set by the previous chairs of the committees. I have thoroughly enjoyed the past number of years working with the committee in a number of areas including the conference, annual lunch, CPD events and the student awards. I have also witnessed first hand the dedication and commitment of committee members to the Institution and its activities.

I thank both Tony McKinley for inviting me onto the committee in the first place, and Derek Mowlds for inviting me to be the vice chair for the last two years. May I take this opportunity to congratulate and thank Derek for chairing the committee, and for delivering an excellent programme of CIBSE events and activities during his tenure. Derek’s experience and knowledge gained from his past experience on the CIBSE committee made for an easy transition to chairman and the responsibility that comes with this position.

I will continue to rely on the advice and guidance of Derek and other past chairs as I feel that each year we should continue to build on the successes of previous years. I look forward to working with the committee going forward and thank those who have agreed to continue with their roles and activities, and others who have assumed new roles. I completely understand that it is becoming increasingly difficult for us all to devote this time to the Institution, but feel that there is a corresponding benefit to the companies and organisations that support our involvement, as well as the wider engineering community.

I will start work immediately on the programme of events and activities for the year ahead and will be in touch with the committee over the next few weeks to finalise our plans. I would also like to welcome new committee members, Patrick Field and Andrew Campbell, and look forward to their involvement and participation over the coming year – the committee needs to continually develop and new members are always welcome.

So, In terms of the year ahead, and some of the challenges that we face as a sector,  I am determined to continue to raise the profile of building services engineering within industry, including the Public Sector and with other institutions and organisations, such as the RIAI, Engineers Ireland and Irish Green Building Council to name but a few. I also thank Pat Lehane for his continuous efforts in creating and maintaining some of these key links.

We will also collaborate on CPD events with other organisations in the built environment to promote an integrated approach to design and energy efficiency. Building services engineers are central to the delivery of low energy, low carbon and efficient buildings (including refurbishments) while maintaining occupant comfort and indoor air quality. It is essential, therefore, that we are appointed and integrated into project teams from the outset to maximise the benefits of early engineering input to the design process.

CIBSE will continue to monitor, and contribute to, developments in regulations and policy relating to carbon reduction, energy, engineering and the built environment, and keep our members up to speed with the very latest information, so we can, in turn, advise our clients and colleagues. We will achieve this by maintaining our strong links with the Department of the Environment, ETCI, the SEAI, the Department of Communictions, Energy and Natural Resources, and the OPW.

Looking ahead, these are but some brief highlights of what we have planned for the coming 12 months. Comprehensive details of the full schedule will be published shortly.

CPD programme — The committee and I are currently working on the programme of CPD events and look forward to including exciting new topics and technologies. To that end I extend an invitation to all involved in the industry to make suggestions. We also intend to continue with, and extend, live webcast links so that more people can participate from around the country, and even abroad.

Technical symposium — The CIBSE technical symposium will be held in Croke Park on 3/4 April 2014. The event will be organised in conjunction with CIBSE in the UK. This event will provide a platform for industry, academics and researchers to present peer-reviewed papers on areas covering current research and development with opportunities to share experiences and foster and develop contacts.

CIBSE Awards — The DIT Bolton St Student awards, the Young Lighter Awards and the Sustainable Design and Research (SDAR) Awards, will all take place in DIT Bolton St and Kevin St next year. All these awards are an excellent opportunity to showcase some of the great work and projects delivered by the students, young engineers and senior engineers in our sector, all supported and encouraged by the DIT and CIBSE. My thanks to the committee members who manage and oversee these projects, and also the many sponsors whose contribution is equally invaluable.

Networking and site visits — A number of other lectures, seminars and networking opportunities will take place, including a masterclass presentation at The Energy Show 2014. In addition, various site visits will be arranged in conjunction the Irish Green Building Council and some of the other building industry trade and professional bodies.

Social events — On a lighter note, both the CIBSE Golf Outing and the Annual Lunch will also go ahead, in addition to the young engineers’ BBQ evening.

So, to conclude, I am committed to working with the committee in serving the Institution and its members to the very best of my ability over the coming year. I would welcome any suggestions that you may have in relation to the work of the CIBSE committee, and any particular areas that you think we should concentrate more of our efforts on.