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

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c s = Specific Heat of Dry Substrate (kJ/kgK)t s = Soil Temperature ( o C)q tf = Heat Transferred into Room (W/m 2 )TC = Transpiration CoefficientR ep = Evaporation Rate (kg/m 2 s)R tp = Transpiration Rate (kg/m 2 s)R et = Evapotranspiration Rate (kg/m 2 s)Of the 19 parameters in equation 2, only q sri , q tf , t a , t d , t p , t s , ν, R et need to be measured inorder to understand the energy exchanges in an extensive green roof. The other parametersare either constants or can be specified according to the real situations.7.3 Green Roof Test Rig for Rainfall RunoffNiall Carroll Page 60The Thermal and Rainwater Runoff Performance of an Extensive Green Roof System
A green roof test rig was set up to compare the rainfall runoff of an extensive green roof anda perspex panel (to replicate a PV panel). A 10 degree roof angle was specified for a shallowflat pitch roof. Guttering was placed on the test rig to collect any runoff and this wasmeasured using measuring cylinders.Figure 38: Green Roof Test Rig for Rainfall RunoffThe total area of the roof was 1.2m 2 , with one half being the sedum blanket and the other halfthe Perspex panel. The sedum blanket was placed in an impervious raised frame, whichallowed for runoff collection. The same sedum blanket was used as for the thermalperformance.Niall Carroll Page 61The 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 and 44: Similarly, Simmons et al. [41] foun
Page 45 and 46: Figure 20: Green Roof Test Rig for
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: (4)Where,α s = Shortwave Absorptiv
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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