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

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7.163 Humidity Sensor StepFigure 36 shows the voltage input setup for the humidity sensor and NI USB-6008 device.Figure 36: Labview Signal Express Voltage Input SetupThe same timing settings were selected as for the thermocouple setup.When the two steps had been set up a test run was undertaken to confirm accurate readingswere being taken.The data acquisition system was now setup up and data was ready to be recorded.Niall Carroll Page 56The Thermal and Rainwater Runoff Performance of an Extensive Green Roof System
7.2 Green Roof Energy BalanceThe green roof energy balance for extensive green roofs proposed by Feng et al. [38] isestablished with the following prequisites:• The lawn, with 100% leaf coverage, is considered as a diffuse grey body.• Thermal effects of plants metabolism - except for photosynthesis, respiration andtranspiration – and thermal effects of microorganisms in the soil are negligible.• The conditions with precipitation and dew are not included.• The green roof is large enough to assume horizontal homogeneity and apply onedimensional (vertical) analysis.The energy exchange between an extensive green roof and its surrounding environment isillustrated as follows:Figure 37: Energy Exchange between an Extensive Green Roof and its EnvironmentUsing the first law of thermodynamics, the following energy balance equation is obtained:Niall Carroll Page 57The 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: Figure 35: Labview Signal Express T
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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