The Thermal and Rainwater Runoff Performance of an Extensive ...

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7 MethodologyA methodology was established to assess the thermal performance of a green roof test rigwith an extensive green roof system installed. A methodology was also established tocompare the rainfall runoff performance of an extensive green roof system with aPhotovoltaic (PV) panel. For this experiment a 5 mm thick perspex sheet was used toreplicate a PV panel.7.1 Green Roof Test Rig for Thermal PerformanceA test rig was set up to measure the thermal performance of a green roof. A roof angle of 10degrees was chosen for a shallow flat pitch roof. The area of the roof was 1.2 m 2 . Fourthermocouples were attached at various points on the green roof test rig to measure underroof, substrate, plant and ambient air temperature. A humidity sensor was placed in thesubstrate in order to measure its moisture content. A data acquisition system was setup usingNational Instrument hardware 9211 and 6008. NI DAQmx and Labview Signal Express wereused to log, analyse and present the data on a laptop.Niall Carroll Page 44The Thermal and Rainwater Runoff Performance of an Extensive Green Roof System
Figure 20: Green Roof Test Rig for Thermal Performance1. Under Roof Thermocouple2. Substrate Thermocouple3. Plant Thermocouple4. Ambient Air Thermocouple5. Humidity Sensor6. NI USB-9211 Measuring Device7. NI USB-6008 Measuring DeviceNiall Carroll Page 45The Thermal and Rainwater Runoff Performance of an Extensive Green Roof System
Page 1 and 2: Department of Mechanical Engineerin
Page 3 and 4: AbstractThis project addresses the
Page 5 and 6: Table of Contents1 Introduction…
Page 7 and 8: 6.2.1 Rainfall Runoff Relationship
Page 9 and 10: List of FiguresFigure 1: Traditiona
Page 11 and 12: Figure 32: Humidity Sensor Located
Page 13 and 14: 1 Introduction1.1 Green Roof Defini
Page 15 and 16: incorporate green roofs into their
Page 17 and 18: 2.3 ExtensiveFigure 5: Extensive Gr
Page 19 and 20: 2.33 Green/Brown Roofs for Biodiver
Page 21 and 22: 3 Construction of Green RoofsThe co
Page 23 and 24: 3.2 Inverted Warm Green Roof Constr
Page 25 and 26: Although less versatile than intens
Page 27 and 28: There are four main methods of esta
Page 29 and 30: • extension of park system• pro
Page 31 and 32: In summer, green roofs can retain 7
Page 33 and 34: The urban heat island effect descri
Page 35 and 36: 4.6 Building FabricWhen vegetation
Page 37 and 38: 5 UK Policy on Green RoofsThere are
Page 39 and 40: Figure 16: Summer Temperatures of R
Page 41 and 42: However, the previous study mention
Page 43: Similarly, Simmons et al. [41] foun
Page 47 and 48: The mineral content of the substrat
Page 49 and 50: Figure 25: NI USB-9211 Thermocouple
Page 51 and 52: It was used to acquire the relative
Page 53 and 54: Figure 33: NI USB-6008 Terminal Ass
Page 55 and 56: Figure 35: Labview Signal Express T
Page 57 and 58: 7.2 Green Roof Energy BalanceThe gr
Page 59 and 60: (4)Where,α s = Shortwave Absorptiv
Page 61 and 62: A green roof test rig was set up to
Page 63 and 64: Figure 40: Green Roof Test Rig for
Page 65 and 66: second day of the experiment. The l
Page 67 and 68: with the artificial rain event. Whe
Page 69 and 70: References1. Sailor D.J. ‘A Green
Page 71 and 72: 31. Mellor, R.S. Salisbury, F.B. Ra
Page 73 and 74: Appendix 1Niall Carroll Page 73The

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