March 14, 2012

Porous Asphalt Pavement Temperature Effects on UHI

Recently, the NCE completed a study for the Asphalt Pavement Alliance (APA) on asphalt pavement temperature effects on overall Urban Heat Island (UHI) with focus on characterizing porous asphalt mixtures. A paper summarizing the study was presented at the Transportation Research Board meeting in January 2012. Excerpts of the study are presented as follows. Please […]

April 21, 2009

Guidebook on Climate, Energy & Urbanization

Climate, Energy, and Urbanization: A Guide on Strategies, Materials and Technologies for Sustainable Development in the Desert is a comprehensive resource tool for those interested in learning about and implementing new concepts into the way we plan, design and build our cities. Focused on two of the most pertinent issues for our desert metropolis – […]

September 25, 2008

Nanoparticle-Filled Liquid Fuels for Efficient Energy Conversion

Nanofuels exhibit great potential for increasing the combustion efficiency of liquid-fueled engines, because of their enhanced thermal and mass transport properties, their higher volumetric heating value relative to pure liquid fuels, and the extremely high surface-area-to-volume ratio of the energetic nanoparticles. Nanofuels, or nanoparticle-filled liquid fuels, are one type of nanofluid, i.e., a nanoscale colloidal […]

September 25, 2008

Solar-Powered Adsorption Cooling

Solar-powered cooling is an attractive concept in that one utilizes solar energy, which is the largest component of a building’s cooling load, to drive a heat-activated air-conditioning system, thus reducing or eliminating the need for conventional, electric-powered air conditioning. Most solar-powered air-conditioning systems to date have been based on well-known absorption refrigeration, which requires difficult-to-handle […]

September 25, 2008

Nano-fluid Enhanced Solar Collector

Objective To experimentally and numerically assess the performance of nanofluids, liquid-nanoparticle suspensions, in direct-absorption solar thermal collectors. Methodology Experimental assessment of the nanofluids for direct-absorption solar thermal collectors has been conducted using a micro-collector.

September 25, 2008

Aerial Remote Sensing of the Urban Heat Islands

Objective Record the surface temperature profile of highly developed areas of Chicago, Illinois. Methodology Record infrared and digital video from an aerial platform (helicopter) during two different times; once during the peak day and again after sunset. Significance The City of Chicago

September 25, 2008

Relation between Urban Morphology and Heat Vulnerability in the City of Chicago

According to Centers for Disease Control and Prevention, the health impact of excessive heat events increases the incidence of mortality and morbidity in affected populations. Modern examples of such events include the heatwaves in France that took the lives of 15,000 citizens in summer of 2003 and the severe heat waves that hit the greater […]

September 25, 2008

City of Phoenix Park-n-Ride Solar Facility

Solar panels were mounted on the top of a shaded parking canopy. These panels generate electricity to power the security guard station as well as provide lighting for the parking lot. The NCE installed temperature sensors to record the temperatures above and below the canopies and at the surface of the exposed and non exposed […]

September 25, 2008

Pavement Temperature Modeling

Objective Create a computation model to estimate the surface and subsurface temperature within multi-layered pavement systems. Methodology Using fundamental heat transfer principles to create a one dimensional finite difference model. Used data collected from testing sites to calibrate the model for different weather conditions. Inputs required: meteorological information (3 day wind speed, solar radiation, air […]

September 25, 2008

Albedo of Urban Infrastructure

Objective Determine correlations between albedo (solar reflectance), pavement material type and age for roads, parking lots and connector streets located with in an urban area. Methodology Measure albedo at over 40 locations around the City of Tempe, Arizona.  Collect information about each surface (traffic volumes, age, material type).  Analyze results to determine whether correlation and […]