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TOOLBOX DIT eng Soc Magazine


News Building services case study Eng Soc events highlights Future events Riddles Jokes

Issue 02


Hi to all our members, It has been an extremely busy year for us so far, but we’re only half way through it! So far we’ve organized and participated in a total of 12 separate events and have collaborated with 7 different societies and clubs with everything from life drawing classes to archery! I would just like to say thanks to everyone we have worked with, it’s been an absolute pleasure and we hope to keep it up. I hope you’ve all enjoyed the first semester as much as I have. Make the most of the Christmas break, good luck in the exams and we’ll see you in the New Year. If anyone would like to contribute to this magazine or get involved feel free to send us and email( Imogen Engineering Society Media Officer

Life Drawing class Careers Evening Archery Design and Build Building services case study Nuts and Bolts quiz Ice Talk World Aids Day Riddles/Jokes/Events

page 02 page 03 page 04 page 05 page 07 page 11 page 14 page 15 page 16

Editor: Imogen Ní Riain

The Committee: Fiona(Treasurer) Ronan(Kevin St Liaison) Julie(PRO) Will(Chair) Benny(Secretary) Imogen(Media Officer)

Contacts:, imogen. Design: Contributor: Noel O Neill BSc, MIE, MCIBSE

Life Drawing Class Engineering society joined up with Life Drawing Society on the 27th of October to do a bit of drawing ‘au natural’. We were supplied with paper, pencils and charcoal, and after the initial giggles subsided everyone focused intently on the drawing, and in my case on not making our lovely Spanish model look ridiculous! This is quite hard to do when the only drawing experience you have is in drawing straight lines! It was an unusual but enjoyable experience for us engineers. A big thank you to Life Drawing soc, it was great fun!

My best attempt! :P

Careers Evening with EngCareers Maire Gonnelly from the engineering careers service gave a careers evening to the members of Engineering society on the 23rd of November. There was a good turnout with some of our Kevin street members making the journey over to Bolton Street for the evening. Well done guys!

It was a very helpful talk as it gave an insight into what working as an engineer and in industry is like, and what to expect in a graduate job. She gave some handy tips on applying for graduate jobs and summer work experience jobs, how to construct your C.V and cover letters. And of course pizza and drinks were provided afterwards.

If you would like to contact the careers service you can email them at

Archery Class DIT Engineering society linked up with the Archery club on the 21st of November to try our hand at some old-school shooting! Here are some photos which Teri from the Socs office took for us

Thanks a million to the Archery Club for the opportunity!

Design and Build Engineering society and ASA are putting their heads together this year to design and build a trebuchet. Our design meetings started on the 24th of November with a good turnout and some people very eager to design.

We had a guest speaker who is a trebuchet enthusiast, and has built many a trebuchet! He gave us some handy tips on designing and building the trebuchet.

We had design classes the following two Thursdays and a design competition on the 8th of December, judged by David Kennedy. Well done to everyone who took part and to Micheal Hanrahan for his winning design.

If you want to get involved in the build in Semester 2 just leave us a Facebook comment or email us at

Case Study of Ventilation & Control Systems Upgrade, UCD Science Lecture Theatre B This article is based on a case study carried out by Noel O Neill BSc, MIE, MCIBSE, (lecturer in Building Services Engineering, DIT) for SEAI (Sustainable Energy Authority of Ireland). The case study deals with good practice in low energy ventilation design in lecture theatres and is based on measured performance results. The work shows the extensive potential for energy saving in the refurbishment of existing buildings.


University College Dublin’s Science Complex was opened in 1964. The complex consists of a lecture theatre building, connected to the 3 science buildings by link bridges. The building is 8,000m2 and contains 6 large theatres which have their original heating/ventilation plant. In 2003 it was decided to upgrade the heating/ventilation plant, lighting and controls for the 400 seated Science Theatre B.

Impetus for the project

The factors that provided impetus for the project, was the rising cost of electricity, the rising electricity consumption building, the changes in occupancy patterns and the existing plant was almost redundant.

Energy Saving Opportunities An energy report suggested extensive energy savings opportunities including:

Heating/ventilation plant operating hours

The plant operated on a fixed time schedule matching the lecture timetable. While this was appropriate in term, operating needs changed regularly during review periods, exams, winter, spring & summer breaks. Also weekend and evening usage was subject to frequent changes.

Ventilation rates

The lecture theatre was built when smoking was permitted and energy costs were low. The fixed speed fans provided 17 litres/sec/person for full occupancy. Leading to high electricity use for the large motors and high heating needs as the fan had no means of heat recovery. Also the old fixed speed belt driven motors that powered the fans were prone to slippage and energy wastage. Modern technology is more efficient and provides heat recovery options.

Lighting operating hours

The theatre was fitted with reasonably efficient T8 fluorescent tubes; however, the lights were manually controlled and often on from 7am (during cleaning) until 10pm (when the building closed).

Solutions Identified Improved Ventilation System

A new Air Handling Unit (AHU) system with integrated variable speed direct drive motors, energy efficient filtration and a heat recovery device that used extract air to preheat supply air was installed. This was only part of the solution, the intelligent controls and operational strategies ensured that the full energy saving potential of the AHU was realized. Some of the control strategies include: •Matching lighting, heating/ventilation plant operating hours to occupancy hours. •Matching ventilation rates to occupant needs by monitoring the carbon dioxide (CO2) levels.

Heating Regulation

The theatre is heated using recovered heat and a heating battery. The Building Management System (BMS) compares air temperature and set point then adjusts the heating based on 3 strategies; •Occupied control - the optimum lighting and temperature when occupied. •Unoccupied control - the min. lighting and temperature when unoccupied. •Non-occupied control - the min. lighting and temperature when occupied but unscheduled.

Fresh Air Cooling

The AHU can be for “free cooling” in summer by speeding up the supply and extract fans, to bring air temperature back to its set point.

Thermal Wheel Regulation

The thermal wheel recovers heat from the extract air and transfers it to the fresh incoming air.

Evaluation of Performance Data obtained from monitoring the energy usage showed the following results for the new system; • • • • •

Reduce plant operating time by a min. of 12%. Reduce ventilation rates by 87% when the AHU is on. Reduce electrical load by 93% reduction when the AHU is on. Reduce electrical energy consumed by 94%. Reduce lighting hours by 33%. Energy comparison Chart

The AHU electrical savings was 17,000 kWh/yr, and lighting control strategy saved of 3,000 kWh/ye resulting in annual cost saving of €1,900/yr. For a more detailed analysis of this study go to

The Annual Nuts and Bolts quiz took place on the 3rd of October this year with lots of societies in attendance including Nutrition society, Engineering Society, Events society, ASA, Samba soc, Juggling soc, Karting club (who were celebrating their website launch) and many more. 26 teams of 4 or 5 entered with a wide variation of names, from the suitable ‘Three Nuts and a Bolt’ to the not so suitable ‘Verbal Diarrhoea’ and ‘Pensioners Paedophiles’. And which must’ve been Ciarán’s favourite name to read out…. ‘Nevin Loves Men’. Our MC for the night, Ciarán Nevin kicked off the quiz with the music round. There was also a picture round, anagrams round, general knowledge rounds and of course the spot prize rounds. The spot prizes went for various challenges, like getting the bar man’s name and phone number, the first guy on stage with a bra on, which guy had the best six pack and the housewife challenge where Julie let us in on a little secret of hers! The hilarity these spot rounds provided was beyond measure!

There were 5 prize winners from the quiz with a tie-breaker for 5th place between Two and a Half Men and Three Nuts and a Bolt:

1st Place Stagnant Water â‚Ź20 One-For-All vouchers

2nd PlaceBus Wankers â‚Ź10 Burritos & Blues Vouchers

3rd PlaceQuiz on my face Tickets to Societies Mad X-mas Ball

4th PlaceVerbal Diarrhoea – Vouchers for Fafie’s Creperie

5th place – Three Nuts and a Bolt – Vouchers for Hell’s Pizza and EngSoc t-shirts.

The night ended with an impromptu male striptease, initiated by “Paddy”, and then DJ soc kicked off with some tunes. It was an absolute success with €400 raised for Wells For Zoë between the raffle and the quiz! Thank you to everyone who attended and to all the societies who helped out, and thanks to Ciarán Nevin who was, as always, a brilliant MC.

ICE Talk The Institute of Civil engineers came to Bolton street on the 1st of December to give a talk on working as a civil engineer, career prospects and graduate jobs. There were four speakers in total and they gave a good insight into what civil engineers do in the workplace. They also touched on how to go about getting jobs, where to look and what opportunities are there for graduates. Refreshments and pizza were provided for students and the speakers afterwards.

World Aids Day DIT engineering Society teamed up with Banter Society on the 1st of December to raise money for World AIDS Day. World AIDS day is a day dedicated to raising awareness of the AIDS pandemic caused by the spread of HIV infection. AIDS has killed more than 25 million people between 1981 and 2007, and an estimated 33.2 million people worldwide live with HIV as of 2007, making it one of the most destructive epidemics in recorded history. The aim of the RED campaign is to eliminate AIDS by 2015. During the day we sold RED cupcakes, raffle tickets, t-shirts and wristbands for the RED night in D2.

It was a great success with over a â‚Ź1000 raised for World AIDS Day. Thank you to everyone who bought a cupcake and donated money!

Riddles First person to email us at with all three correct answers wins an EngSoc tshirt!!! 1. . You have a barrel of oil, and you need to measure out just one litre. How do you do this if you only have a three-litre container and a five-litre container? 2. What row of numbers comes next in this series? 1 11 21 1211 111221 312211 13112221 3. If your sock drawer has 6 black socks, 4 brown socks, 8 white socks, and 2 tan socks, how many socks would you have to pull out in the dark to be sure you had a matching pair? Jokes Two engineering students were walking across campus when one said, “Where did you get such a great bike?” The second engineer replied, “Well, I was walking along yesterday minding my own business when a beautiful woman rode up on this bike. She threw the bike to the ground, took off all her clothes and said, ‘Take what you want.’” The second engineer nodded approvingly, “Good choice; the clothes probably wouldn’t have fit.”

To the optimist, the glass is half full. To the pessimist, the glass is half empty. To the engineer, the glass is twice the required capacity.


Christmas Clothes appeal Any unused clothes lying around? Bring them in to college and leave them in the boxes down near the SU for our Christmas clothes appeal for Wells for ZoĂŤ!

DIT MAD Christmas Ball Thursday 15th December 2011 The Village, Wexford street. Get your tickets from SU shops or committee members!!!


Engineering Mag