P33 Impact
of Cool Roofs and Rooftop Solar Photovoltaic deployment on Urban Energy Utilization
in a Future Warm Climate
Tewari, M., The Weather Company, IBM,
F. Salamanca, Arizona State University
(ASU), A. Martilli, CIEMAT, Spain, Jimy Dudhia, National Center for Atmospheric Research,
L. A. Treinish, The
Weather Company, IBM and A. Mahalov, ASU
|
While Urban Heat Islands (UHIs) have been extensively
studied, they have recently received greater attention due to their impact on
the environmental, health and energy sectors. Such impacts are exacerbated with a
warmer, future climate requiring comprehensive assessment of mitigation
strategies, especially related to urban energy demand. In a recent paper by Tewari et al (2016), UHIs and their interaction with heat
waves under current and future climate conditions were investigated. Salamanca et al (2014, 2015) examined
the effect of air conditioning (AC) systems on air temperature and their
energy consumption in a semi-arid environment. They found that explicit
representation of waste heat from AC systems improved the modeling of 2m air temperature in comparison to local
observations. They also found
that during the night, heat emitted from AC systems increased the mean 2m air
temperature by more than 1 degree C for some urban locations. Salamanca et al (2016) investigated
summertime regional impacts of cool and rooftop solar photovoltaic (PV)
deployment on near-surface air temperature and cooling energy demand in
Phoenix and Tucson. In the
present study, two mitigation strategies are considered, namely cool roofs
and rooftop photovoltaic deployment for future climate scenarios and urban
expansion in Phoenix and Tucson using a 15-day period in June 2012. The research questions we are
addressing are: (1) Are cool
roofs in the future as effective as in the present climate in terms of
increasing energy savings and reducing air temperature? (2) Is PV deployment
a better mitigation strategy than cool roofs for these same considerations? |