Experimental analysis of chilled radiant panels coupled with displacement ventilation : indoor climatic quality and energy performance

Maria Grazia Clemente

Experimental analysis of chilled radiant panels coupled with displacement ventilation : indoor climatic quality and energy performance.

Rel. Stefano Paolo Corgnati, Lei Fang, Bjarne W. Olesen. Politecnico di Torino, Corso di laurea specialistica in Architettura (Costruzione), 2009

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Abstract:	INTRODUCTION Providing a comfortable and healthy indoor environment for building occupants it is one of thè main goals in thè design process. Especially nowadays when people spend most of theirtime indoors. The thesis examine the comfort and the Indoor climatic Quality both theoretically, but also and above ali, in the experimental aspects through tests in a classroom. The experiments were performed at the International Centre for Indoor Environment and Energy, ICIEE, the most prestigious research center in Europe working on issues of thermal comfort and air quality. The climatic test chamber is a classroom/conference room which takes piace on thè second floor in building 402, Department of Civil Engineer at Technical University of Denmark. This room is equipped with different types of heating, ventilation, and air-conditioning systems (HVAC). The purpose of HVAC System is to provide good air quality and comfortable thermal environment that will ensure occupant's satisfaction, health and high productivity. The objective of the thesis is to investigate through experimental analyses the indoor environmental parameters and the energy performance inside a classroom combined ventilation System (Displacement Ventilation) with radiant panels (Chilled ceiling/floor). The development of thè radiant panels is growing as a low-energy systems, and represent a technology with broad potential application of low energy requirements. In addition to the energy, the thermal comfort guarantee enhancement of the System: in fact they are mainly based on radiation heat exchange. In particular, the research work's aim is to provide an optimal thermal comfort and a good IAQ during the summer period, when the heat loads in the classroom is quite high.
Relatori:	Stefano Paolo Corgnati, Lei Fang, Bjarne W. Olesen
Tipo di pubblicazione:	A stampa
Soggetti:	S Scienze e Scienze Applicate > SH Fisica tecnica S Scienze e Scienze Applicate > SL Scienze
Corso di laurea:	Corso di laurea specialistica in Architettura (Costruzione)
Classe di laurea:	NON SPECIFICATO
Aziende collaboratrici:	NON SPECIFICATO
URI:	http://webthesis.biblio.polito.it/id/eprint/1605
Capitoli:	TABLE OF CONTENTS Nomenclature and terms Symbols 1 INDOOR ENVIRONMENT 1.1 Indoor air quality 1.2 Thermal comfort 1.3 Locai thermal discomfort 1.3.1 Draught 1.3.2 Vellicai temperature difference 1.3.3 Radiant asymmetry 1.3.4 Cold/Warm floor 1.4 Requirements in standards 2 HVAC SYSTEM 2.1 Ventilation 2.2 Displacement ventilation 2.3 Radiant panels 2.4 Chilled panels 2.5 Chilled floor 2.6 Chilled beams 2.7 Displacement Ventilation combined with radiant cooling 2.7.1 Cooling floor 2.7.2 Ceiling panels combined with displacement ventilation 3 METHODS 3.1 Facilities 3.2 Description of thè room 3.3 Test conditions 3.4 Sensors locations and measurement procedure 3.4.1 Thermal measurements 3.4.2 Heatflow 3.4.3 Airvelocity 3.4.4 Humidity, operative temperature, air velocity 3.4.5 Tracergas measurement 3.4.6 Ageofair 4 RESULTS 4.1 Case: Displacement ventilation NEAR_ZOI\IE air velocity and temperature distribution 4.2 Case: Displacement ventilation OCCUPIED_ZONE air velocity and temperature distribution 4.3 Case: Displacement Ventilation + Chilled floor NEAR_ZONE air velocity and temperature distribution 4.4 Case: Displacement Ventilation + Chilled floor OCCUPIED_ZONE air velocity and temperature distribution 4.5 Case: Displacement Ventilation + Chilled ceiling NEAR_Z0NE air velocity and temperature distribution 4.6 Case: Displacement Ventilation + Chilled ceiling OCCUPIED_ZONE air velocity and temperature distribution 4.7 Vertical air temperature difference and vertical temperature gradients 4.8 Draught 4.9 PMVePPD 4.10 Age of air 4.11 Displacement ventilation 4.12 Displacement Ventilation + Chilled Floor 4.13 Displacement Ventilation + Chilled Ceiling 4.14 Displacement Ventilation 4.15 Displacement Ventilation + Chilled Floor 4.16 Displacement Ventilation + Chilled Ceiling 4.17 Energy performance 5 DISCUSSION 6 CONCLUSION 7 References 8 ANNEXES 8.1 Air velocity measurements 8.2 Room air temperature, surfaces temperature, cooling input and heat flow measurements. 8.3 Humidity, operative temperature and air velocity measurements DV 8.4 Humidity, operative temperature and air velocity measurements DV+CF 8.5 Humidity, operative temperature and air velocity measurements DV+CC 8.6 Displacement Unit
Bibliografia:	References Hàkon Skistad (ed), Elisabeth Mundt, Petre V. Nielsen, Kim Hagstròm, Jorma Railio, "Displacement Ventilation in non-industrial premises", REHVA Guidebook, 2004 (2nd edition) Hàkon Skistad, "Displacement Ventilation", Research Studies Press, John Wiley & Sons, Ltd. West Sussex (UK), 1994 Maija Virta (ed.), David Butler, Jonas Gràslund, Jaap Hogeling, Erik Lund Kristianses, Mika Reinikainen, Gunnar Svensson, "Chilled Beam Application Guidebook", REHVA Guidebook, 2004 Francis Allard, Mat Santamouris, "Naturai Ventilation in building -A design Handbook-", James & James, London, 1998. Standards ASHRAE (1992). ANSI/ASHRAE Standard 55-1992, "Thermal environment conditions for human occupancy", Atlanta: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. ASHRAE (1992). ANSI/ASHRAE Standard 113-2005, "Method of testing for room air diffusion", Atlanta: American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. CEN/TC 156, CR 1752:1998, "Ventilation for buildings. Design criteria for thè indoor environment", European Committee for Standardization, Brussels, Belgium CEN/TC 156, EN 12792:2003, "Ventilation for buildings - Symbols, terminology and graphical symbols", European Committee for Standardization, Brussels, Belgium CEN/TC 156, EN 15251:2007, "Ventilation for buildings - Indoor environmental input parameters for design and assessment of energy performance of buildings addressing indoor air quality, thermal environment, lighting and acoustics"', European Committee for Standardization, Brussels, Belgium ISO 7726:1998, "Ergonomics of thè thermal environment - Instruments for measuring physical quantities", Geneva: International Standard Organization for Standardization. ISO 7730:2005, "Ergonomics of thè thermal environment - Analytical determination and interpretation of thermal comfort using calculation of thè PMV and PPD indices and locai thermal comfort criteria", Geneva: International Standard Organization for Standardization Thesis Francesco Causone, "Radiant Heating and Cooling: limitations and possibilities of improvement", Phd thesis, Politecnico di Torino, 2009 Fabio Baldini, "An experimental study of comfort air distribution in a room with radiant floor heating/cooling and displacement ventilation", Master thesis, Technical University of Denmark, 2008 Gatis Abele, "Design of advanced HVAC System for lecture room", Master thesis, Technical University of Denmark, 2004

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