Event: ENERGY in BUILDINGS 2017 Date: Saturday October 21, 2017 Place: Athens, Hellas © δ.α.χ. 2017 page [1/2] CV_Gaitanos.docx # Gaitanos Stefanos Mechanical Engineer Title: Sales Trainee, AHI Carrier SEE Air-Conditioning S.A. email: [email protected] Phone number: +30 210 6796 389 Paper/Presentation: Presentation Presentation title: Dedicated Outdoor Air Systems: A comparison of the Initial and Recurring System Operating Costs An increasing number of published articles have criticised the deficiencies of all-air variable air volume systems in meeting space minimum ventilation air quantities as dictated by ANSI/ASHRAE Standard 62.1 – 2016. A tested and proven method of mitigating the deficiencies of the aforementioned systems involves the usage of Dedicated Outdoor Air Systems (DOASs). These HVAC units are used to decouple space sensible and latent loads; effectively, the DOASs are designed to deliver the required space-specific outdoor air (OA) quantities at all times whilst also handling OA sensible and latent loads. Space sensible and latent loads are then treated using a parallel HVAC system (VRFs, FCUs, etc.). In practice, DOASs may also be designed so that space latent loads are fully treated, further reducing the duty requirements of the parallel system. The virtually unlimited DOAS arrangements, however, have caused confusion in the engineering community regarding the selection of units that present the most favourable pay-back period. Moreover, the highly climate-dependent performance of DOASs further complicates the equipment selection process for design engineers. The aim of this presentation was to assess the purchasing and operating costs of six different system configurations in four different cities, namely Athens, Thessaloniki, Heraklion and Rhodes, by examining the under-lying thermodynamic processes. The pay-back period of each unit arrangement was then determined and the systems with the shortest pay-off period were identified. A number of conclusions were finally drawn to assist design engineers in developing sustainable and energy-efficient DOAS solutions tailored to client requirements.

Gaitanos Stefanos University of Michigan IELTS Academic Certificate (Score: 8.0/9.0) Griechisches Staatszertifikat (Stufe B2) Goethe Institut Zertifikat B1 Memberships IMechE Associate

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Event: ENERGYinBUILDINGS2017Date: SaturdayOctober21,2017 Place: Athens,Hellas

Gaitanos Stefanos

Mechanical Engineer

Title: Sales Trainee, AHI Carrier SEE Air-Conditioning S.A.

email: [email protected] �Phone number: +30 210 6796 389 �Paper/Presentation: Presentation �

Presentationtitle:Dedicated Outdoor Air Systems:

A comparison of the Initial and Recurring System Operating Costs

Anincreasingnumberofpublishedarticleshavecriticisedthedeficienciesofall-airvariableairvolumesystemsinmeetingspaceminimumventilationairquantitiesasdictatedbyANSI/ASHRAEStandard 62.1 – 2016. A tested and proven method of mitigating the deficiencies of theaforementioned systems involves theusageofDedicatedOutdoorAir Systems (DOASs). TheseHVAC units are used to decouple space sensible and latent loads; effectively, the DOASs aredesignedtodelivertherequiredspace-specificoutdoorair(OA)quantitiesatalltimeswhilstalsohandlingOAsensibleand latent loads.Spacesensibleand latent loadsare thentreatedusingaparallelHVACsystem(VRFs,FCUs,etc.). Inpractice,DOASsmayalsobedesignedsothatspacelatentloadsarefullytreated,furtherreducingthedutyrequirementsoftheparallelsystem.Thevirtually unlimited DOAS arrangements, however, have caused confusion in the engineeringcommunity regarding the selectionof units that present themost favourable pay-backperiod.Moreover, the highly climate-dependent performance of DOASs further complicates theequipmentselectionprocessfordesignengineers.Theaimofthispresentationwastoassessthepurchasing and operating costs of six different system configurations in four different cities,namely Athens, Thessaloniki, Heraklion and Rhodes, by examining the under-lyingthermodynamicprocesses.Thepay-backperiodofeachunitarrangementwasthendeterminedandthesystemswiththeshortestpay-offperiodwereidentified.Anumberofconclusionswerefinally drawn to assist design engineers in developing sustainable and energy-efficient DOASsolutionstailoredtoclientrequirements.

Page 2: Gaitanos Stefanos University of Michigan IELTS Academic Certificate (Score: 8.0/9.0) Griechisches Staatszertifikat (Stufe B2) Goethe Institut Zertifikat B1 Memberships IMechE Associate

Event: ENERGYinBUILDINGS2017Date: SaturdayOctober21,2017 Place: Athens,Hellas

CV:

PERSONAL INFORMATION – CONTACT DETAILS

• Address: 5 Lesvou Street, 20 100, Corinth, Corinthia, Greece • Tel: 6950270263 • E-mail: [email protected]

EDUCATION 2012- 2016: University of Leeds (Integrated Masters) Title: MEng, BEng (Hons) Mechanical Engineering Work Experience 2016 – Present: Internal Sales at AHI Carrier SEE Air-Conditioning S.A. Language ECPE University of Michigan IELTS Academic Certificate (Score: 8.0/9.0) Griechisches Staatszertifikat (Stufe B2) Goethe Institut Zertifikat B1 Memberships IMechE Associate Member