Tag Archives: David Doherty

T Bourke acquires HTS

David Doherty, Director with Patrick O’Reilly, Director, David Bourke, Managing Director, Michael Flannery, Chairman and Niall Bourke, Director.

T Bourke, one of Ireland’s leading mechanical and electrical contractors, has acquired Hospital Technical Systems (HTS), a leader in the supply, installation and maintenance of medical and process gases. Established in 1968,

T Bourke has a reputation for high-quality installations with experience across all industry sectors, from residential and commercial through to process and pharma. The acquisition of HTS, which was established in 1990, will allow the company strengthen and extend its service offering to new and existing clients.

HTS Chairman, Michael Flannery commented: “We are delighted to be part of the T Bourke Group and look forward to continuing to serve our clients with a first-class services offering. T Bourke is the perfect fit for us as both companies have a similar customer-focused approach and there are key operational and management synergies we can benefit from.

“I am confident that under the T Bourke umbrella HTS will continue to grow and serve the medical and process gases industry throughout Ireland.”

High Standard at Student Awards

Back Row: Brian West, and CIBSE Ireland Vice-Chair with Ciara Ahern, DIT; Micheál O’Flaherty, DIT; and David Doherty, Chair, CIBSE Ireland. Middle Row, Level 8: Callum O’Toole, Runner-up with David Keogh, Winner and Sean Flynn O’Connor, Runner-up. Front Row, Level 7: Seamus Murphy, Winner with Andrew Cruise and Gerard O’Neill, both Runner-up.

Back Row: Brian West, and CIBSE Ireland Vice-Chair with Ciara Ahern, DIT; Micheál
O’Flaherty, DIT; and David Doherty, Chair, CIBSE Ireland. Middle Row, Level 8: Callum O’Toole, Runner-up with David Keogh, Winner and Sean Flynn O’Connor, Runner-up.                                               Front Row, Level 7: Seamus Murphy, Winner with Andrew Cruise and Gerard O’Neill, both Runner-up.

This year the competition was very tight with judges commenting that the standard was getting tougher. In the BEng Technician Programme (Level 7), Andrew Cruise presented on “Micro CHP for Residental and Commercial Applications”. He delivered a convincing argument for CHP, offering details on  running costs for actual projects.

Second up saw Ger O’Neill take to the podium with “VAV & Displacement Ventilation Systems”. Ger explained and compared the two systems, detailing the pros and cons.

Finally, Seamus Murphy presented his project on “Applications of Geothermal Heat Pumps”. He explained the principal operation and benefits of a heat pump and different types of collectors.

The second part of the afternoon saw presentations from BEng (Hons) Programme (Level 8). First to present was Sean Flynn O’Connor on “Economic and Environmental Benefits of CHP Systems”. Sean detailed his findings and summarised his project.

Callum O’Toole then presented on “District Heating and its Feasibility in Ireland”. He offered actual site data from a live site to present his findings.

Last to present was David Keogh on “Cleanroom Technology & Design Analysis”. He displayed flowcharts on air movement within cleanrooms.

The awards were sponsored by CIBSE Ireland and presentations were again made by David Doherty, CIBSE Chairman. David Keogh was confirmed as winner by the judges.

‘Construction Dream Team’ Debate

Enda Gilroy, Electric Ireland with Carole Pollard, President, RIAI, Sean Gallagher and David Doherty, Chairman, CIBSE Ireland

Enda Gilroy, Electric Ireland with Carole Pollard, President, RIAI, Sean Gallagher and David Doherty, Chairman, CIBSE Ireland

The Radisson Blu Royal Hotel in the centre of Dublin was the scene for CIBSE Ireland’s recent Breakfast Briefing. From 7am people began gathering for a unique construction debate entitled “The Construction DreamTeam”. This was the first collaborative all-industry event hosted by CIBSE Ireland in a unique, studio-like, setting.

A panel of industry experts including Sean Downey, CIF, Carole Pollard, RIAI, David Corrigan, ACEI and CIBSE and Dr Kevin Kelly, DIT and CIBSE made up the representative team with the audience encouraged to become the fifth panel member by David Doherty, Chairman CIBSE Ireland in his opening address. The event facilitator was entrepreneur and Dragons Den panellist Sean Gallagher. Because of his experience in, and knowledge of, the sector, he also played an active role in the debate.

The panel discussed stimulating topics from sustainability through to the challenges posed by industry growth. The Construction Contracts Act — which coincidently was been signed across town at the same time by Minister for Business and Employment Ged Nash — was also analysed and debated. Each speaker laid out their views from their respective institutions before moderator, Sean Gallagher, challenged them on topics and ideas. Issues raised included labour shortages, failure to get students to enter the sector, and the cost of capital for projects. Towards the end of the briefing an enthuasitic Q&A session from the audience followed.

The event drew to a close just before 10.30am with Sean Gallagher thanking all involved, especially Enda Gilroy of Electric Ireland, whose generous sponsorship contributed so much to its success.

 

Enda Gilroy, Electric Ireland with Carole Pollard, President, RIAI, Sean Gallagher and David Doherty, Chairman, CIBSE Ireland

 

CIBSE OUTING A ‘SHOT GUN’ SUCCESS

John Valentine, Daikin Ireland with David Doherty, Chairman, CIBSE Ireland

John Valentine, Daikin Ireland with David Doherty, Chairman, CIBSE Ireland

In a change from the usual format, this year’s outing featured a shot gun start with 24 four-ball teams participating. All entered into the spirit of the occasion and arrived in excellent time for registration and collective tee-off at 12.30pm sharp. There was some slight drizzle early in the morning but, by the time the teams went out, it was dryand warm, with a notable wind that added another dimension to the “longest drive” competition.

Scoring was calculated under a Florida scramble in a bid to allow for fairer team results. This meant that the player whose shot was selected as best shot did not get to play the next shot. This also meant no delays on the course, the format working so well that after two hours of play the teams were exactly half way round. Four hours after tee off the first teams began appearing back.

With all the score cards returned by approximately 4.45pm, the golf committee undertook the difficult task of selecting the various category winners, while the golfers showered and adjourned to the bar for some post-golf banter and socialising.

Thanks to the shot gun format, virtually everyone who played remained on for the dinner and presentation of prizes with the meal being served at approximately 6pm and the presentation of prizes being completed by 7.15pm.

Individual prizes were presented for longest drive, nearest the pin and inside the pro, with team prizes going to third, second and first. The premier team award is the PJ Doyle Trophy, first presented in 1990 in memory of Patrick J Doyle following his premature death. PJ was widely known and respected throughout the industry, was CIBSE Chairman from 1988 to 1990, and a director at HA O’Neil

David Doherty Joins T Bourke & Co

David Doherty, Business Development Director, T Bourke & Co

David Doherty, Business Development Director,   T Bourke & Co

T Bourke & Co has appointed David Doherty as Business Development Director. David is a chartered engineer with over 15 years experience in the Irish building services industry and he has worked in consultancy, sales and contracting.

David was educated in DIT, GCU and DCU, achieving BEng Hons and an MBA. He is currently Chairman of CIBSE Ireland.

Managing Director, Niall Bourke commented: “We are delighted to have David join our company as his extensive experience and skillset will add to our team. As the market lifts, we want to build on current trade and to develop future growth across both the mechanical and electrical sectors.”

T Bourke & Co is a leading mechanical and electrical contractor with offices in Dublin and Limerick. The company has been trading since 1968 and has wide experience across the commercial, industrial and pharmaceutical sectors.

 

 

Doherty elected CIBSE Ireland Chairman

David Doherty, newly-elected Chairman CIBSE Ireland being congratulated by outgoing chairman Sean Dowd.

David Doherty, newly-elected Chairman CIBSE Ireland being congratulated by outgoing chairman Sean Dowd.

David Doherty, previously Vice-Chair, was unanimously elected Chairman of CIBSE Ireland at the recent annual general meeting in Dublin. In his outgoing address former Chairman Sean Dowd reported on the many successes of the last 12 months, and in particular on the emergence of CIBSE YEN as an active representative force for young engineers within the Institute.

As Sean’s “shadow” over the last 12 months David has been actively involved in all events and activities. He now intends to develop and build on recent achievements to further strengthen the membership, and authority, of CIBSE Ireland within the building services sector.

The CIBSE YEN technical evening and BBQ at the end of May signals the start of summer, the end of the CIBSE Ireland programme, and always attracts a great attendance.

This year was no different with the business end of the evening commencing with a number of lectures and discussion in DIT Kevin St before everyone adjourned to the famous (infamous?) Dicey Reilly’s in Harcourt St for burgers, pints, chat and craic.

Engineers young and old mingled together until late into the evening before the sensible “oldies” made their excuses and left, while those without sense tried to recapture lost youth and paid for it the next day!

CIBSE Ireland Recognises Service to Industry

Back: Nick Meade, incoming President, CIBSE with Sean Dowd, Chairman, CIBSE Ireland and David Doherty, Vice-CHairman, CIBSE Ireland. Front: John McNamara (ex Sisk) with Kevin O'Rourke (ex SEAI),Pat Lehane, Publisher & Editor,Buiding Services News and John Doherty (ex McGrattan & Kenny).

Back: Nick Meade, incoming President, CIBSE with Sean Dowd, Chairman, CIBSE Ireland and David Doherty, Vice-Chairman, CIBSE Ireland. Front: John McNamara and Kevin O’Rourke, who each received  a Certificate of Appreciation and Dublin Crystal memento, and Pat Lehane and John Doherty, who were presented with bronze medals.

CIBSE used the occasion of the recent CIBSE Ireland Annual Lunch to recognise the long-standing service of four individuals to the building services sector in Ireland. A framed certificate of appreciation and an engraved Dublin Glass memento were presented to John McNamara (ex Sisk) and Kevin O’Rourke (ex SEAI), while bronze medals were presented to Pat Lehane, Publisher & Editor of Building Services News and John Doherty (ex McGrattan & Kenny). The latter two are also long-standing, and current, CIBSE Committee members. Nick Meade, incoming President of CIBSE and Sean Dowd, Chairman, CIBSE Ireland, did the honours.

This year’s lunch was the biggest by far with a capacity 320 consultants, contractors, product suppliers and their respective guests enjoying wonderful fare and availing of what has now become the most important social and networking occasion in the building services sector’s calendar of events. Unfortunately, space restrictions meant that many more were disappointed but the CIBSE Lunch Sub-Committee is already on the case and details of a larger venue for the 2015 lunch will be announced early in the new year.

Guest speaker was Gerard Hosford, a building services graduate from CIT, who now works as a senior mechanical engineer for Patrick Parsons Consulting Engineers in the UK. His address detailing his career progression and day-to-day work projects was extremely interesting but, more than that, it highlighted just how valuable a building services-related degree is from any of the Irish educational institutions.

The mood and atmosphere of the gathering was upbeat. It reflected an air of optimism that augurs well for 2015 and beyond, but was also realistic in acknowledging that there is much to do to, especially in the way of realistic tender prices and profit margins, to secure a sustainable future for the sector.

 

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. 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.

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/