Abstract
Green roof has the advantages of energy-saving and ecological environmental protection effects with, however, insufficient investigations quantitatively, which will keep it from practical engineering projects. In this paper, based on the guarded hot-box testing method, the energy-saving and thermal insulation properties of two lightweight roofing insulation modules with Sedum lineare and light planting soil will be studied and compared in the outdoor climate. The experiments involved two operating conditions, i.e., with the air conditioning on and off, that both maintained the moisture content of the two modules the same. It was found that the air temperature within the guarded hot-box was lower than the outdoor air temperature by 5.4 °C for the roof module with S. lineare, and the temperature drop of 5.4 °C was 0.8 °C lower than that of the roof module with lightweight planting soil. The average cumulative power consumption of the module with S. lineare was about 0.27 kWh/m2, which was 0.05 kWh/m2 lower than that of the module with lightweight planting soil. The electrical saving rate of the module with S. lineare was at 15.6 % compared with that of the module with the lightweight planting soil.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Feng C, Zhang Y, Meng Q (2010) Current situation of the thermotechnical performance of the vegetation roof. Huazhong Build 28:91–94
Zhao D, Tan Y, Tang M (2011) Energy-saving effect of lightweight green roof technology. Constr Technol 2:82–84
Yang W, Guo K (2011) Performance testing analysis on the thermal insulation layer of a modular vegetation roof. New Build Mater 38:40–48
Zhao D, Xue W (2008) Electricity saving effect of lightweight green roof. Shanghai Agric Acad J 24:99–101
Gardner WR (1959) Solutions of the flow equation for the drying of soil and other porous medial. Soil Sci Soc Am J 23:183–187
Zhao H, Liu X, Wu Q (1992) Soil water evaporation mathematical mode for the leave covering conditions. Soil Water Conserv Bull 19(2):61–64
Xie X, Zuo D (1991) Farmland evaporation. China Meteorological Press
Jiang J (1995) Research on the soil water evaporation model. Sichuan For Sci Technol 15(4):20–25
Lu W, Bai K (1987) New method for calculating evaporation value. Hydraul Eng 26(3):12–15
Lei S (1984) Theoretical analysis on one-order soil water evaporation model. J Chengdu Univ Sci Technol 4:135–138
Zhang Y, Cai S, Cai M (1991) Uneven soil water evaporation research under the conditions of low water content of surface soil. J Wuhan Hydraul Power 24(2):157–164
Jin D, Yang S (1981) Method to calculate soil water evaporation capacity based on ordinary meteorological data. People’s Yangtze River 4:47–52
Li H, Cai H, Wang J, Zhao W (2008) Soil water evaporation mathematical model in the reference of water evaporation capacity. J Agric Eng 24(3):1–4
Ren G (2011) Comparative study on the overseas mature green roof systems. China Build Waterproof 23:24–28
Li L, Li X (2007) Analysis on the planted roof system technology in Weida, Germany. New Build Mater 34:13–15
Acknowledgments
This work was financially supported by the Guangdong Provincial Science and Technology Program for International Cooperation Projects (2011B050400032), Science and Technology Planning Project for The Ministry of Housing and Urban–Rural Development (2011-k1-28), Guangzhou Science and Technology Project (2010KP046), Science and Technology Planning Project for Panyu District, Guangzhou City (2011-Z-01-37), State Key Laboratory of Subtropical Building Science, South China University of Technology (2011KB22), Building Energy-Saving and Application Technology key Laboratory, Guangdong Province (2011048), China Postdoctoral Science Foundation (2012M521576) and Doctoral Foundation, Guangdong University of Technology (12ZK0380).
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2014 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Yang, W., Wang, Z., He, X., Zhao, X. (2014). Comparative Study on the Insulation Performance of a Lightweight Planted Roof Module Based on Outdoor Guarded Hot-box Testing Method. In: Li, A., Zhu, Y., Li, Y. (eds) Proceedings of the 8th International Symposium on Heating, Ventilation and Air Conditioning. Lecture Notes in Electrical Engineering, vol 261. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-39584-0_38
Download citation
DOI: https://doi.org/10.1007/978-3-642-39584-0_38
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-39583-3
Online ISBN: 978-3-642-39584-0
eBook Packages: EngineeringEngineering (R0)