12 results match your criteria Applied Thermal Engineering[Journal]

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A numerical evaluation of a novel recovery fresh air heat pump concept for a generic electric bus.

Appl Therm Eng 2022 Jun 7;209:118181. Epub 2022 Feb 7.

Bamford Bus Company Ltd T/A Wrightbus, Ballymena BT42 1SA, UK.

Since the outbreak of the worldwide COVID-19 pandemic, public transportation networks have faced unprecedented challenges and have looked for practical solutions to address the rising safety concerns. It is deemed that in confined spaces, operating heating units (and cooling) in non-re-circulation mode ( all-fresh air mode) could reduce the airborne transmission of this infectious disease, by reducing the density of the pathogen and exposure time. However, this will expectedly increase the energy demand and reduce the driving range of electric buses. Read More

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Review of air disinfection approaches and proposal for thermal inactivation of airborne viruses as a life-style and an instrument to fight pandemics.

Appl Therm Eng 2022 Feb 29;202:117855. Epub 2021 Nov 29.

Joint Institute for High Temperatures of the Russian Academy of Sciences, 13/2 Izhorskaya St, Moscow 125412, Russia.

COVID-19 (Coronavirus Disease 2019) pandemic highlighted the importance of air biosecurity because SARS-CoV-2 is mainly transmitted from person to person via airborne droplets. Preventing infectious droplets from entering the body is one of the best ways to protect against infection. This paper reviews the transmission patterns of airborne pathogens and air disinfection methods. Read More

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February 2022

Performance comparison of heat recovery systems to reduce viral contagion in indoor environments.

Appl Therm Eng 2021 May 14;190:116843. Epub 2021 Mar 14.

University IUAV of Venice, Dorsoduro 2206, 30123 Venice, Italy.

Strong ventilation increments are currently suggested for containing the airborne diffusion of COVID-19 in indoor environments. However, it can involve an unacceptable growing of energy consumption. Therefore, maximum care must be addressed to improve efficiency of ventilation heat recovery (VHR). Read More

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Estimation of the critical external heat leading to the failure of lithium-ion batteries.

Appl Therm Eng 2020 Oct;179

National Institute for Occupational Safety and Health (NIOSH), 626 Cochrans Mill Road, Pittsburgh, PA, 15236, USA.

A detailed experimental investigation on the critical external heat leading to the failure of lithium-ion (Li-ion) batteries was conducted using an Accelerating Rate Calorimeter (ARC) at the National Institute for Occupational Safety and Health (NIOSH). Several types of commercial Li-ion batteries were selected for the study, including an iron phosphate Li-ion battery (LFP), a lithium-titanate battery (LTO), and a lithium-nickel-manganese-cobalt-oxide battery (NMC). Each battery was placed in a specially designed sealed steel canister and heated in the ARC. Read More

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October 2020

Investigation on the contaminant distribution with improved ventilation system in hospital isolation rooms: Effect of supply and exhaust air diffuser configurations.

Jinkyun Cho

Appl Therm Eng 2019 Feb 7;148:208-218. Epub 2018 Nov 7.

Energy & Environment Business Division, KCL (Korea Conformity Laboratories), Jincheon 27872, South Korea.

This study, that is practice-based learning in a real hospital construction project, has evaluated the ventilation performance of three strategies in the protection of health care workers and HVAC control for airborne infectious diseases induced by contaminated exhaled air from patients in a negative pressure isolation room. This paper examines air flow path and airborne pollutant distribution by computational fluid dynamics modeling and field measurement. In hospitals, the risk of virus diffusion mainly depends on air flow behavior and changes in direction caused by supply air and exhaust air locations. Read More

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February 2019

Experimental and numerical study of heat transfer through a synchronous belt transmission type AT10.

Appl Therm Eng 2017 Dec;127:705-717

ETAP Laboratory - University Abou bekr Belkaid, Tlemcen, Algeria.

In most industrial applications, the re-use of belts in power transmissions continues to increase and invade the market especially in automobiles where various types of belts are used. For this purpose, the belt manufacturers are aware of the importance and the valuable advantages of this transmission member and put all their efforts to develop and improve its geometrical and mechanical characteristics in order to achieve an optimal service life. Indeed, this article is devoted to an experimental and numerical thermal study of a toothed belt transmission type AT10. Read More

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December 2017

Modeling carbon monoxide spread in underground mine fires.

Appl Therm Eng 2016 May;100:1319-1326

Office of Mine Safety and Health Research, National Institute for Occupational Safety and Health, 626 Cochrans Mill Road, Pittsburgh, PA 15236, USA.

Carbon monoxide (CO) poisoning is a leading cause of mine fire fatalities in underground mines. To reduce the hazard of CO poisoning in underground mines, it is important to accurately predict the spread of CO in underground mine entries when a fire occurs. This paper presents a study on modeling CO spread in underground mine fires using both the Fire Dynamics Simulator (FDS) and the MFIRE programs. Read More

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Effect of Common Faults on the Performance of Different Types of Vapor Compression Systems.

Appl Therm Eng 2016 Apr;98:61-72

HVAC&R Equipment Performance Group, National Institute of Standards and Technology, 100 Bureau Drive, MS 8631, Gaithersburg, MD 20899, USA.

The effect of faults on the cooling capacity, coefficient of performance, and sensible heat ratio, was analyzed and compared for five split and rooftop systems, which use different types of expansion devices, compressors and refrigerants. The study applied multivariable polynomial and normalized performance models, which were developed for the studied systems for both fault-free and faulty conditions based on measurements obtained in a laboratory under controlled conditions. The analysis indicated differences in responses and trends between the studied systems, which underscores the challenge to devise a universal FDD algorithm for all vapor compression systems and the difficulty to develop a methodology for rating the performance of different FDD algorithms. Read More

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Energy Use Consequences of Ventilating a Net-Zero Energy House.

Appl Therm Eng 2016 Mar;96:151-160

HVAC&R Equipment Performance Group, Energy and Environment Division, National Institute of Standards and Technology, 100 Bureau Drive, MS 8633, Gaithersburg, MD 20899, USA.

A Net-Zero Energy Residential Test Facility (NZERTF) has been constructed at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland to demonstrate that a home similar in size, aesthetics, and amenities to those in the surrounding communities can achieve net-zero energy use over the course of a year while meeting the average electricity and water use needs of a family of four in the United States. The facility incorporates renewable energy and energy efficient technologies, including an air-to-air heat pump system, a solar photovoltaic system, a solar thermal domestic hot water system, and a heat recovery ventilation system sized to meet American Society of Heating, Refrigeration, and Air-Conditioning Engineers (ASHRAE) Standard 62.2-2010 ventilation requirements. Read More

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A two-temperature model for selective photothermolysis laser treatment of port wine stains.

Appl Therm Eng 2013 Sep;59(1-2):41-51

Laser Treatment Center, Department of Dermatology, Medical School, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China.

Selective photothermolysis is the basic principle for laser treatment of vascular malformations such as port wine stain birthmarks (PWS). During cutaneous laser surgery, blood inside blood vessels is heated due to selective absorption of laser energy, while the surrounding normal tissue is spared. As a result, the blood and the surrounding tissue experience a local thermodynamic non-equilibrium condition. Read More

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September 2013

Numerical study on the dispersion of airborne contaminants from an isolation room in the case of door opening.

Appl Therm Eng 2009 Jun 22;29(8):1544-1551. Epub 2008 Jul 22.

Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taiwan.

A negative pressure isolation room is built to accommodate and cure patients with highly infectious diseases. An absolutely airtight space effectively prevents infectious diseases from leaking out of the isolation room. Opening the door leads to a breakdown in isolation conditions and causes the dispersion of infectious air out of the isolation room. Read More

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The prospect and development of incinerators for municipal solid waste treatment and characteristics of their pollutants in Taiwan.

Appl Therm Eng 2008 Dec 24;28(17):2305-2314. Epub 2008 Jan 24.

Department of Environmental Engineering, National Chung Hsing University, Taichung 402, Taiwan, ROC.

Taiwan is a small, densely populated island with unique experiences in the construction and operation of incinerators. In such a small area, Taiwan has built 22 incinerators over a short span of time, combusting large amount of municipal solid waste as much as 23,250 tons per day. This study focuses on the history of construction and development of incinerators in Taiwan as well as the characteristics of pollutants, such as heavy metals (Pb, Cd, and Hg), acid gases (NO , SO , CO, and HCl), and dioxins emitted from the incinerators. Read More

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December 2008
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