Plenary Lecture
Energy Efficient Ventilating Residential Buildings
Professor Teet-Andrus Koiv
Department of Environmental Engineering
Tallinn University of Technology
Estonia
E-mail: teet.koiv@ttu.ee
Abstract: Residential buildings make up the largest share of buildings. The presentation deals primarily with energy-saving ventilation problems in Eastern European residential buildings, a substantial part of apartment buildings. A large part of the apartments buildings in this area is naturally ventilated and were built in the years 1960-1990. Since the end of the last century such apartment buildings have been intensively renovated. First, low hermetic windows were exchanged, as a result of which air change decreased several times. The characteristics of indoor climate in such a situation are given. It has become clear that renovating the ventilation is essential. The possible solutions for renovating the ventilation in old apartment buildings are the following: -Installation of fresh air valves in buildings with natural ventilation - increase in heating costs.
-Balancing ventilation - almost impossible to use in renovating old apartment buildings (Difficult to install supply air channels).
-Apartment based balancing ventilation - difficult to use in old apartment buildings as people do not like duct installation in the flat.
-Exhaust mechanical ventilation with the heat pump and fresh air valves in living rooms - one of the possible solutions.
-Installation of the room based air handling units (AHU) and exhaust ventilators in the WC, bathroom and kitchen - one of the possible efficient solutions. Since the latter two are energy efficient solutions – solutions based on heat recovery - the presentation focuses on their research results. The review and study of exhaust mechanical ventilation with the heat pump system in old and new apartment buildings are given. From room-based ventilation aggregates, the use of recuperative and regenerative AHU-s has been studied.
Brief Biography of the Speaker: T.-A.Koiv received his M.Sc. in Thermal Engineering from the Tallinn University of Technology and the PhD at the Institute of Civil Engineering of St Petersburg in Heating, Heat Supply, Ventilation and Air Conditioning in 1978. Since 2003 he has been Full Professor and Head of the Chair of Heating and Ventilation at the Tallinn University of Technology, Estonia. He has read several courses in the field of Thermal Engineering, Heat Supply, Heating, Ventilation and Air Conditioning, Renovation of HVAC systems at the Tallinn University of Technology. At present he supervises 6 PhD students. Prof T.-A.Koiv has 18 inventions and patents in the field of Heating and Heat Supply. He is an active researcher in the field of energy efficiency, indoor climate and building service systems. He is the author of the 10 book and textbooks. Dr. Koiv has published more than 100 papers in books, journals and conference proceedings. Prof. Koiv has received an award of Silver medal for his inventive activities at the Exhibition of the Achievements of National Economy.
He is vice dean (in the field of science) of the Civil Engineering Faculty of the Tallinn University of Technology and head of several projects (Baltic cooperation in energy efficiency and feasibility in urban planning – ENEF, Decreasing the consumption of heat energy by awareness rising and performance of consumers based on measurements of individual heating costs, Minimum requirements for energy performance - additional analysis, new international master program “Energy Efficiency of Buildings”, Energy Auditing and Certification of Buildings, Doctoral School of Civil and Environmental Engineering). He is a member of CBI and WSSET. He has been reviewer of Journals and member of Scientific Committee of Conferences. His research and activity has made significant impact to national scientific and engineering communities.