12.4.2 Heat Exchange
Rouboa and Monteiro (2007) simulated, by using a CFD model, the effects on
temperature and wind speed on the introduction of hot water pipes along a
greenhouse at nighttime conditions, under three shapes: natural convection heating
(case A), artificial heat pipes (case B), and natural ventilation (case C) by using the
turbulence model. Re-Normalization Group (RNG) observed an average increase
in air temperature to 2.2, 6.7, and 3.5 °C; the turbulence was lower for case A,
slightly increasing with the heating system for case B, and higher for case C, due
to the effect of natural ventilation.
(a)
(b)
(c)
(d)
Fig. 12.5 Wind velocity interior vectors with 5 ms
-1 wind velocity outside the greenhouse, on
four open windows sceneries tested. a Roof windows windward open, b roof windows leeward
open, c roof and side windows windward open, d roof and side windows leeward open
12 Advances in Computational Fluid Dynamics Applied to Biosystems
349
Rouboa and Monteiro (2007) simulated, by using a CFD model, the effects on
temperature and wind speed on the introduction of hot water pipes along a
greenhouse at nighttime conditions, under three shapes: natural convection heating
(case A), artificial heat pipes (case B), and natural ventilation (case C) by using the
turbulence model. Re-Normalization Group (RNG) observed an average increase
in air temperature to 2.2, 6.7, and 3.5 °C; the turbulence was lower for case A,
slightly increasing with the heating system for case B, and higher for case C, due
to the effect of natural ventilation.
(a)
(b)
(c)
(d)
Fig. 12.5 Wind velocity interior vectors with 5 ms
-1 wind velocity outside the greenhouse, on
four open windows sceneries tested. a Roof windows windward open, b roof windows leeward
open, c roof and side windows windward open, d roof and side windows leeward open
12 Advances in Computational Fluid Dynamics Applied to Biosystems
349