The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Andrew J. Young - One of the best experts on this subject based on the ideXlab platform.
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telemetry pill measurement of core temperature in humans during Active Heating and cooling
Medicine and Science in Sports and Exercise, 1998Co-Authors: Catherine Obrien, Reed W. Hoyt, Mark J. Buller, John W. Castellani, Andrew J. YoungAbstract:ABSTRACTPurpose:This study compared the agreement between core temperature measurements obtained using an ingestible temperature pill telemetry system (Tpill) with those obtained from rectal (Tre) and esophageal (Tes) thermocouples under conditions of increasing and decreasing body temperature.Metho
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Telemetry Pill Measurement of Core Temperature during Active Heating and Cooling.
1997Co-Authors: Catherine O'brien, Reed W. Hoyt, Mark J. Buller, John W. Castellani, Andrew J. YoungAbstract:Abstract : The agreement between core temperature measurements obtained using an ingestible temperature pill telemetry system (T sub pill) and rectal (T sub re) and esophageal (T sub es) thermocouples was compared under conditions of both increasing and decreasing body temperature. Nine subjects participated in four 3-h trials: cold (18 deg C) water rest (CWR); cold water exercise (CWE); warm (36 deg C) water rest (WWR); and warm water exercise (WWE). During exercise trials, subjects completed three bouts of 15-min rest, followed by 45-min exercise on a cycle ergometer at 50% of peak oxygen uptake. The temperature pill was taken 10-12 h before testing. Root mean squared deviation (RMSD) was calculated for each pair of measurements (T sub pill vs. T sub re, T sub pill VS T sub es, T sub re VS. T sub es) for each trial. An RMSD of '0' indicates perfect agreement, and as RMSD increases, agreement worsens. On CWR, the RMSD for T sub pill-T sub es (0.23+/-0.04) was lower (P
Martin Zálešák - One of the best experts on this subject based on the ideXlab platform.
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The Use of the Photovoltaic System in Combination With a Thermal Energy Storage for Heating and Thermoelectric Cooling
Applied Sciences, 2018Co-Authors: Jan Skovajsa, Martin ZálešákAbstract:The article is focused on the research of the usage of modern accumulation technology. The proposed system is able to improve the thermal comfort of building interiors. That text depicts the technology, which uses a photovoltaics and other renewable energy sources for Active Heating and cooling. The bases of the presented technology are the phase change material and thermal energy storages. So, it passively improves the thermal capacity of the constructions of the buildings. Moreover, there is a possibility to use it for Active Heating and cooling. The technology contains thermoelectric assemblies, so, there is a very interesting possibility to store thermal energy with use of renewable energy sources (such as photovoltaic system) and thermoelectric coolers side by side. In the manuscript, there are shown measurements and results of the Active operating modes of proposed technology. It was found the technology is able to work in Active Heating and cooling modes. It works quite well in Active Heating mode. On the other hand, thermoelectric cooling mode had a problem with overHeating. In the end, the problem was solved and the cooling mode works. The measurements and results are described in the text.
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Thermoelectric cooling in combination with photovoltaics and thermal energy storage
MATEC Web of Conferences, 2017Co-Authors: Jan Skovajsa, Martin ZálešákAbstract:The article deals with the use of modern technologies that can improve the thermal comfort in buildings. The article describes the usage of thermal energy storage device based on the phase change material (PCM). The technology improves the thermal capacity of the building and it is possible to use it for Active Heating and cooling. It is designed as a “green technology” so it is able to use renewable energy sources, e.g., photovoltaic panels, solar thermal collectors, and heat pump. Moreover, an interesting possibility is the ability to use thermal energy storage in combination with a photovoltaic system and thermoelectric coolers. In the research, there were made measurements of the different operating modes and the results are presented in the text.
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Phase Change Material Based Accumulation Panels in Combination with Renewable Energy Sources and Thermoelectric Cooling
Energies, 2017Co-Authors: Jan Skovajsa, Martin Koláček, Martin ZálešákAbstract:The article deals with the use of modern materials and technologies that can improve the thermal comfort in buildings. The article describes the design and usage of a special accumulation device, which is composed of thermal panels based on phase change materials (PCMs). The thermal panels have an integrated tube heat exchanger and Heating foils. The technology can be used as a passive or Active system for Heating and cooling. It is designed as a “green technology”, so it is able to use renewable energy sources, e.g., photovoltaic (PV) panels, solar thermal collectors and heat pumps. Moreover, an interesting possibility is the ability to use thermoelectric coolers. In the research, measurements of the different operating modes were made, and the results are presented in the text. The measurement approves that the technology improves the thermal capacity of the building, and it is possible to use it for Active Heating and cooling.
Ronald E. West - One of the best experts on this subject based on the ideXlab platform.
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Active Heating and Cooling
2020Co-Authors: Ronal Larson, Ronald E. WestAbstract:This chapter contains sections titled: Historical Background, Legislative Mandates, National Program for Solar Heating and Cooling of Buildings, Lessons Learned, References
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Solar Thermal Quality Assurance
2020Co-Authors: Ronal Larson, Ronald E. WestAbstract:Implementation of Solar Thermal Technology describes thesuccesses and failures of the commercialization efforts of the U.S.solar thermal energy program, from the oil embargo of 1973 throughthe demise of the program in the early Reagan administration andits afterlife since then. The emphasis throughout is on lessonslearned from the solar experience, with an eye toward applicationsto other projects as well as toward possible renewal of efforts atcommercialization.Part I discusses the history of government involvement in solardevelopment and the parallel development of the market for solarproducts. Part II looks at the histories of specific commercializationprograms for five areas (Active Heating and cooling, passivetechnologies, passive commercial building activities, industrialprocess heat, and high-temperature technologies). Parts III-VIIIfocus in turn on demonstration and construction projects, qualityassurance, information dissemination programs, efforts to transfertechnology to industry, incentive programs (tax credits, financing,and grants), and organizational support.Solar Heat Technologies: Fundamentals and Applications, Volume 10
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Solar Thermal Organizational Support
2020Co-Authors: Ronal Larson, Ronald E. WestAbstract:Implementation of Solar Thermal Technology describes thesuccesses and failures of the commercialization efforts of the U.S.solar thermal energy program, from the oil embargo of 1973 throughthe demise of the program in the early Reagan administration andits afterlife since then. The emphasis throughout is on lessonslearned from the solar experience, with an eye toward applicationsto other projects as well as toward possible renewal of efforts atcommercialization.Part I discusses the history of government involvement in solardevelopment and the parallel development of the market for solarproducts. Part II looks at the histories of specific commercializationprograms for five areas (Active Heating and cooling, passivetechnologies, passive commercial building activities, industrialprocess heat, and high-temperature technologies). Parts III-VIIIfocus in turn on demonstration and construction projects, qualityassurance, information dissemination programs, efforts to transfertechnology to industry, incentive programs (tax credits, financing,and grants), and organizational support.Solar Heat Technologies: Fundamentals and Applications, Volume 10
Jian Su - One of the best experts on this subject based on the ideXlab platform.
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Lumped models for transient thermal analysis of multilayered composite pipeline with Active Heating
Applied Thermal Engineering, 2015Co-Authors: Chen An, Jian SuAbstract:Abstract In this study, improved lumped parameter models were proposed for transient thermal analysis of multilayered composite pipeline with Active Heating, which is essential for flow assurance design and operating strategies of deepwater subsea pipelines. Improved lumped models for transient heat conduction in multilayered composite pipelines were based on two-points Hermite approximations for integrals. The transient energy equation for the bulk temperature of the produced fluid was transformed into a set of ordinary differential equations in time by using a finite difference method. The coupled system of ordinary differential equations for average temperatures in the solids and bulk temperature of the fluid at each longitudinal discretization point along the pipeline was solved by using an ODE solver. With the proposed method, we analyzed the transient heat transfer in stainless steel-polypropylene-stainless steel sandwich pipes (SP) with Active electrical Heating. Convergence behaviors of the average temperature of each layer and the bulk temperature of the produced fluid calculated by using the improved lumped models (H0,0/H1,1 and H1,1/H1,1 approximations) against the number of grid points along the pipelines were presented. Case studies were performed to investigate the effect of the linear rate of power input and the average velocity on the bulk temperature distribution of the produced fluid.
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Thermal design of multi-layered composite pipelines for deep water oil and gas production
Journal of Computer Applications in Technology, 2012Co-Authors: Jian Su, Djane R. Cerqueira, Su-zhen WangAbstract:This paper addresses the technological challenges in the thermal design of multi-layer composite pipelines for offshore production of oil and gas in deep waters. An overview is provided for the flow assurance requirements, the thermal insulation systems and Active Heating of pipelines. A basic framework of thermal design is presented that consists of steady-state and transient heat-transfer analysis of multi-layered composite pipelines. Under some simplifying hypotheses, the thermal profile of the produced fluid along the pipeline is given by an analytical solution. Transient heat-transfer during a cold-down of a typical pipeline for deep water oil and gas production is simulated by numerical solution of conjugate heat-transfer in the solid and energy transport in the fluid.
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Simulation of Transient Heat Transfer of Sandwich Pipes With Active Electrical Heating
Journal of Offshore Mechanics and Arctic Engineering-transactions of The Asme, 2005Co-Authors: Jian Su, Djane R. Cerqueira, Segen F. EstefenAbstract:This paper presents an analysis of transient heat transfer in sandwich pipelines with Active electrical Heating. The mathematical models governing the heat conduction in the composite pipeline and the energy transport in the produced fluid were solved by using finite difference methods. Numerical results of computational simulation of cool-down for three sandwich pipeline configurations under typical production conditions were presented. The analysis showed that the sandwich pipe with Active Heating is a viable solution to meet severe flow assurance requirements of ultra-deepwater oil production even under unplanned and prolonged cool-down conditions.
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Flow Assurance of Deepwater Oil and Gas Production: A Review
Volume 2: Safety and Reliability; Pipeline Technology, 2003Co-Authors: Jian SuAbstract:Flow assurance is essential for economic and reliable production of oil and gas in deep water environment. The present paper discusses the complex physical phenomena involved in deep water production and the challenging engineering problems of flow assurance; and reviews recent works to understand the processes and tackle the problems. The following topics are discussed: flow regime transition, pressure drop, flow pattern, slug flow and severe slugging, transient multiphase flow, thermal insulation, insulation materials, Active Heating and wax deposition.Copyright © 2003 by ASME
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Thermal Analysis of Combined Active Heating and Passive Insulation of Deepwater Pipelines
21st International Conference on Offshore Mechanics and Arctic Engineering Volume 4, 2002Co-Authors: Jian Su, Clarissa R. Regis, Adriana BottoAbstract:In this paper, we first present a global heat balance analysis of typical deepwater pipelines for oil and gas production and show that Active Heating is necessary for long pipelines due to technical limitations of passive thermal insulation systems. Two methods of combined Active Heating mid passive insulation are then considered. By the first method, Active Heating is provided by circulating hot water in annulus. Under certain simplifying hypothesis, we provide a close form analytical solution for the temperature profiles of the produced fluid and heat medium. By the second method, Active Heating is provided by electrical resistance on the inner steel pipe. For this case, we propose a Heating method that minimises the power requirement for a given minimum temperature of produced fluid. Numerical results are shown for the second Heating method. Significant reduction in power requirement is achieved.© 2002 ASME
Jan Skovajsa - One of the best experts on this subject based on the ideXlab platform.
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The Use of the Photovoltaic System in Combination With a Thermal Energy Storage for Heating and Thermoelectric Cooling
Applied Sciences, 2018Co-Authors: Jan Skovajsa, Martin ZálešákAbstract:The article is focused on the research of the usage of modern accumulation technology. The proposed system is able to improve the thermal comfort of building interiors. That text depicts the technology, which uses a photovoltaics and other renewable energy sources for Active Heating and cooling. The bases of the presented technology are the phase change material and thermal energy storages. So, it passively improves the thermal capacity of the constructions of the buildings. Moreover, there is a possibility to use it for Active Heating and cooling. The technology contains thermoelectric assemblies, so, there is a very interesting possibility to store thermal energy with use of renewable energy sources (such as photovoltaic system) and thermoelectric coolers side by side. In the manuscript, there are shown measurements and results of the Active operating modes of proposed technology. It was found the technology is able to work in Active Heating and cooling modes. It works quite well in Active Heating mode. On the other hand, thermoelectric cooling mode had a problem with overHeating. In the end, the problem was solved and the cooling mode works. The measurements and results are described in the text.
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Thermoelectric cooling in combination with photovoltaics and thermal energy storage
MATEC Web of Conferences, 2017Co-Authors: Jan Skovajsa, Martin ZálešákAbstract:The article deals with the use of modern technologies that can improve the thermal comfort in buildings. The article describes the usage of thermal energy storage device based on the phase change material (PCM). The technology improves the thermal capacity of the building and it is possible to use it for Active Heating and cooling. It is designed as a “green technology” so it is able to use renewable energy sources, e.g., photovoltaic panels, solar thermal collectors, and heat pump. Moreover, an interesting possibility is the ability to use thermal energy storage in combination with a photovoltaic system and thermoelectric coolers. In the research, there were made measurements of the different operating modes and the results are presented in the text.
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Phase Change Material Based Accumulation Panels in Combination with Renewable Energy Sources and Thermoelectric Cooling
Energies, 2017Co-Authors: Jan Skovajsa, Martin Koláček, Martin ZálešákAbstract:The article deals with the use of modern materials and technologies that can improve the thermal comfort in buildings. The article describes the design and usage of a special accumulation device, which is composed of thermal panels based on phase change materials (PCMs). The thermal panels have an integrated tube heat exchanger and Heating foils. The technology can be used as a passive or Active system for Heating and cooling. It is designed as a “green technology”, so it is able to use renewable energy sources, e.g., photovoltaic (PV) panels, solar thermal collectors and heat pumps. Moreover, an interesting possibility is the ability to use thermoelectric coolers. In the research, measurements of the different operating modes were made, and the results are presented in the text. The measurement approves that the technology improves the thermal capacity of the building, and it is possible to use it for Active Heating and cooling.
