Thermophysical Properties Research Literature Retrieval Guide Edited by Y. S. Touloukian, J. K. Gerritsen and N. Y. Moore Second edition, revised and expanded. Book 1: Pp. xxi + 819. Book 2: Pp.621. Book 3: Pp. ix + 1315. (New York: Plenum Press, 1967.) n.p.

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Heat and Mass Transfer

From a Novel

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Principles Of Enhanced Heat Transfer

Buildings are among the largest consumers of electricity in the US. A significant portion of this energy use in buildings can be attributed to HVAC systems used to maintain comfort for occupants. In most cases these building HVAC systems run on fixed schedules and do not employ any fine grained control based on detailed occupancy information. In this paper we present the design and implementation of a presence sensor platform that can be used for accurate occupancy detection at the level of individual offices. Our presence sensor is low-cost, wireless, and incrementally deployable within existing buildings. Using a pilot deployment of our system across ten offices over a two week period we identify significant opportunities for energy savings due to periods of vacancy. Our energy measurements show that our presence node has an estimated battery lifetime of over five years, while detecting occupancy accurately. Furthermore, using a building simulation framework and the occupancy information from our testbed, we show potential energy savings from 10% to 15% using our system.

[ACM Press the 2nd ACM Workshop - Zurich, Switzerland (2010.11.02-2010.11.02)] Proceedings of the 2nd ACM Workshop on Embedded Sensing Systems for Energy-Efficiency in Building - BuildSys \'10 - Occupancy-driven energy management for smart building automation

Biodiesel is a recognized replacement for diesel fuel in compressed ignition engines due to its significant environmental benefits. The purpose of this study is to investigate the engine performance and emissions produced from Jatropha curcas, Ceiba pentandra and Calophyllum inophyllum biodiesel in compressed ignition engine. The biodiesel production process and properties are discussed and a comparison of the three biodiesels as well as diesel fuel is undertaken. After that, engine performance and emissions testing was conducted using biodiesel blends 10%, 20%, 30% and 50% in a diesel engine at full throttle load. The engine performance shows that those biodiesel blends are suitable for use in diesel engines. A 10% biodiesel blend shows the best engine performance in terms of engine torque, engine power, fuel consumption and brake thermal efficiency among the all blending ratios for the three biodiesel blends. Biodiesel blends have also shown a significant reduction in CO2, CO and smoke opacity with a slight increase in NOx emissions.

(Energy, SCI-Q1, Top 10%) - Engine performance and emissions using Jatropha curcas, Ceiba pentandra and Calophyllum inophyllum biodiesel in a CI diesel engine

ABSTRACT Nanofluids, which are stable suspension of nanoparticles in a carrier liquid, have gained traction in the past two decades for multiple scientific traits and a wide range of industrial features; one of them pivots around their improved physical properties and superior heat transfer capabilities over pure fluid. Viscosity plays a vital role in fluid flow and heat transfer characteristics of a nanofluid, as it is linked to the pumping power of fluid. The presence of the particles in the surfacted host liquids alters the viscosity of the medium and in nanofluid, and hence nanofluid rheology needs to be characterized to gauge their suitability in thermal transport applications. The rheological behavior of Al2O3 and TiO2–water nanofluids, stabilized by two different surfactants, is measured at different concentrations (0.1–2.0%) and temperatures (293–333 K). Transmission electron microscopy and dynamic light scattering measurement are executed to describe particle morphology and size distribution, respectively, while zeta potential and UV-visible spectroscopy have been employed to identify the stability of the nanofluids. The result shows that viscosity of the prepared suspension diminishes with increment in temperature and increases with enhancement in concentration. Nanofluid also appears as a non-Newtonian fluid with a shear rate between 12 and 232s−1 as they exhibit shear thickening behavior.

Effect of particle loading and temperature on the rheological behavior of Al2O3 and TiO2 nanofluids

Vibration analysis of composite exhaust manifold for diesel engine using CFD

Air-conditioning cost savings, CO2 emission benefits and return on investment by using waste in porotherm bricks in hot-arid and warm-temperate climates

Asif Afzal

Papers

Effect of particle loading and temperature on the rheological behavior of Al2O3 and TiO2 nanofluids

Vibration analysis of composite exhaust manifold for diesel engine using CFD

Air-conditioning cost savings, CO2 emission benefits and return on investment by using waste in porotherm bricks in hot-arid and warm-temperate climates

Heat transfer enhancement of rectangular fins with circular perforations

Numerical Investigation of Beta Ratio and Reynolds Number Effect on Coefficient of Discharge of Venturimeter