EXPERIMENTAL EXAMINATION OF HEAT TRANSFER PERFORMANCE OF THE HEATED RADIANT WALL SYSTEM
In recent
years, radiant heating systems have been catching more observation under favor
of the many advantages such as; energy saving and thermal comfort. However,
owing the fact that limited information on the system dynamics and the heat
transfer characteristics of radiant systems, conventional systems are still
preferred to radiant systems. Thereupon, radiant ceiling and floor systems are
favored to wall systems. Also previous researchers have focused on radiant
ceiling and floor systems instead of radiant wall systems. For this reason, a
controlled climatic test set-up was built and detailed examinations were
conducted. In this regard, to evaluate the heat transfer coefficients of the
radiant wall panels, 10 different test cases were run using different supply
water temperatures. On the basis of the
obtained measurements, in the steady state, heat transfer coefficients,
depending on the characteristic temperature differences and the heat transfer
rates have been calculated. According to the results, the approximate mean
values of 2.40, 5.49 and 8.29 W/m2K were evaluated, respectively for
the convective, radiant and total heat transfer coefficients of radiant wall
heating systems.
___
- [1] Okamoto, S., Kitora, H., Yamaguchi, H., Oka, T., (2010). A simplified calculation method for estimating heat flux from ceiling radiant panels. Energy and Buildings, 42, 29-33.
- [2] Imanari, T., Omori, T., Bogaki, K. (1999). Thermal comfort and energy consumption of the radiant ceiling panel system, comparison with the conventional all-air system. Energy and Buildings, 30, 167-175.
- [3] Stetiu, C. (1999). Energy and peak power savings potential of radiant cooling systems in U.S. commercial buildings. Energy and Buildings, 30, 127-138.
- [4] Milorad, B., Dragan, C. (2012). Energy, cost, and CO2 emission comparison between radiant wall panel systems and radiator systems. Energy and Buildings, 54, 496-502.
- [5] DeWerth, D.W., Loria, R.L. (1989). In-space Heater Energy Use for Supplemental and Whole House Heating. ASHRAE Transaction, 95 (1), 239-250.
- [6] Franc, S. (1999). Economic Viability of Cooling Ceiling Systems. Energy and Building, 30, 195-201.
- [7] Catalina, T., Virgone, J., Kuznik, F. (2009). Evaluation of thermal comfort using combined CFD and experimentation study in a test room equipped with a cooling ceiling. Building and Environment, 44, 1740-1750.
- [8] Dudkiewicz, E., Jezowiecki, J. (2009). Measured Radiant Thermal Fields in Industrial Spaces Served by High Intensity Infrared Heater. Energy and Buildings, 41, 27-35.
- [9] Myhren, J. A., Holmberg, S. (2009). Flow Patterns and Thermal Comfort in a Room with Panel, Floor and Wall Heating. Energy and Buildings, 40, 524-536.
- [10] Koca, A., Gemici, Z., Bedir, K. (2014). Thermal comfort analysis of novel low exergy radiant heating cooling system and energy saving potential comparing to conventional systems. Progress in Exergy, Energy and Environment, Springer International Publishing, Switzerland, 38, 435-445.
- [11] Koca, A., Gemici, Z., Topaçoğlu, Y., Çetin, G., Acet, R.C., Kanbur, B.B. (2013). Işınım ısıtma ve soğutma sistemlerinin ısıl konfor analizleri. 11. Ulusal tesisat mühendisliği kongresi, İzmir, 2025-2042.
- [12] Manuel, A., Tejero-González, A. (2012). Experimental Study on the Cooling Capacity of a Radiant Cooled Ceiling System. Energy and Buildings, 54, 207-214.
- [13] Causone, F., Corgnati, S.P., Filippi, M., Olesen, W.B. (2009). Experimental evaluation of heat transfer coefficients between radiant ceiling and room. Energy Buildings, 41, 622-628.
- [14] Miriel, J., Serres, L., Trombe, A. (2002). Radiant ceiling panel heating-cooling systems: experimental and simulated study of the performances, thermal comfort and energy consumptions. Appl. Therm. Eng., 22, 1861-1873. [15] Koca, A., Gemici, Z., Topacoglu, Y., Cetin, G., Acet, R.C., Kanbur, B.B. (2014). Experimental investigation of heat transfer coefficients between hydronic radiant heated wall and room. Energy Buildings, 82, 211-221.
- [16] Koca, A., Acikgoz, O., Cebi, A., Cetin, G., Dalkilic, A., Wongwises, S. (2017). An experimental investigation devoted to determine heat transfer characteristics in a radiant ceiling heating system. Heat Mass Transfer, 1- 13.
- [17] Koca, A., Cetin, G. (2017). Experimental investigation on the heat transfer coefficients of radiant heating systems: Wall, ceiling and wall-ceiling integration. Energy and Buildings, 148, 311-326.
- [18] Acikgoz, O., Cebi, A., Celen, A., Dalkilic, A., Koca, A., Cetin, G., Gemici, Z., Wongwises S. (2017). A Novel ANN-Based Approach to Estimate Heat Transfer Coefficients in Radiant Wall Heating Systems. Energy and Buildings, 1- 6.
- [19] Erikci Çelik, S.N., Zorer Gedik, G., Parlakyildiz, B., Koca, A., Çetin, M.G, Gemici, Z. (2016). The performance evaluation of the modular design of hybrid wall with surface heating and cooling system. A/Z ITU Journal of the Faculty of Architecture, 13(12), 31-37.
- [20] Kanbur, B.B., Atayılmaz, S.O., Koca, A., Gemici, Z., Teke, İ. (2013). Işınım ısıtma panellerinde açığa çıkan ısı akılarının sayısal olarak incelenmesi. 19. Ulusal Isı Bilimi ve Tekniği Kongresi, Samsun, 1498-1502.
- [21] EN 1264-5 Standard (2008). Water based surface embedded heating and cooling systems. Part 5: heating and cooling surfaces embedded in floors, ceilings and walls - determination of the thermal output, USA.
- [22] BS EN 14037-5 Standard (2016). Free hanging heating and cooling surfaces for water with a temperature below 120°C. Open or closed heated ceiling surfaces. Test method for thermal output, USA.
- [23] Olesen, B.W., Bonnefoi, F., Michel, E., De Carli, M. (2000). Heat exchange coefficient between floor surface and space by floor cooling – theory or a question of definition. ASHRAE Transactions, DA-00-8-2, 684-694.
- [24] ANSI/ASHRAE Standard 138 (2005). Method of Testing for Rating Ceiling Panelsfor Sensible Heating and Cooling. ASHRAE, USA.
- [25] ASHRAE Standart 55 (2003). Thermal environment conditions for human occupancy. ASHRAE, USA.
- [26] Koca, A., Atayilmaz, S.O., Ozden A. (2016). Experimental investigation of heat transfer and dehumidifying performance of novel condensing panel. Energy Buildings 129, 120-137.
- [27] EN 14240 (2004). Ventilation for Buildings Chilled Ceilings Testing and Rating. British Standards.
- [28] Holman, J.P. (1994). Experimental Methods For Engineers, (6th Ed). Mcgraw-Hill Inc., New York.
- [29] BS EN 15377-1 (2008). Heating systems in buildings. Design of embedded water based surface heating and cooling systems - determination of the design heating and cooling capacity. British Standards.
- [30] Zhang, L., Liu, X.H., Jiang, Y. (2013). Experimental evaluation of a suspended metal ceiling radiant panel with inclined fins. Energy Buildings 62, 522-529.
- [31] Alamdari, F., Hammond, G.P. (1983). Improved data correlations for buoyancy-driven convection in rooms. Building Services Engineering Research and Technology, 4 (3), 106-112.
- [32] ASHRAE Handbook of Fundamentals, 1981.
- [33] Awbi, H.B., Hatton, A. (1999). Natural convection from heated room surfaces. Energy and Buildings, 30, 233-244.
- Başlangıç: 2015
- Yayıncı: YILDIZ TEKNİK ÜNİVERSİTESİ