The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform
Ta Hui Lin - One of the best experts on this subject based on the ideXlab platform.
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Efficiency and emissions of a new domestic Gas Burner with a swirling flame
Energy Conversion and Management, 2007Co-Authors: Shuhn Shyurng Hou, Chien Hsiung Lee, Ta Hui LinAbstract:This experimental investigation is aimed at studying the influence of five significant parameters, namely swirl flow, loading height, primary aeration, Gas flow rate (heat input), Gas supply pressure and semi-confined combustion flame on thermal efficiency and CO emissions of domestic Gas Burners. We focus particularly on the effects of a swirling flame on the performance of the new swirl flow Burner (SB). The results showed that the swirl flow Burner (SB) yields higher thermal efficiency and emits only slightly higher CO concentration than those of the conventional radial flow Burner (RB). These characteristics are attributed to the significant improvement in heat transfer coefficient at the vessel bottom resulting from the prolonged residence time of the combustion products in the vicinity of the vessel bottom. With the increase of loading height, the CO emission decreases owing to the reduction of quenching by flame impingement on the load. However, at high loading height, the flame and combustion Gases are cooled to a greater extent by mixing with ambient air before contacting the loading vessel, and thus, the temperature gradient for heat transfer is decreased, which leads to the decrease of thermal efficiency. As the thermal input increases, the thermal efficiency is reduced and the CO emission increases. With increasing primary aeration, the CO emission is diminished, but the thermal efficiency is almost unaffected. Additionally, the addition of a shield (named semi-confined combustion flame) achieves a great increase in thermal efficiency. The thermal efficiency of the SB with the semi-confined combustion flame yields a markedly higher thermal efficiency, by about 12%, than that of the RB with open flame. ?? 2006 Elsevier Ltd. All rights reserved.
F.m. Gonçalves - One of the best experts on this subject based on the ideXlab platform.
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Property coverage for quality assessment of fault tolerant or failsafe systems
9th IEEE On-Line Testing Symposium 2003. IOLTS 2003., 2003Co-Authors: F.m. Gonçalves, M.b. Santos, I.c. Teixeira, J.p. TeixeiraAbstract:In the design environment, system properties, such as fault tolerance and safe operation, need to be demonstrated in new product development of safety-critical systems. The onus of the proofs is by no means trivial, and the associated computational cost can be overwhelming. In this paper, a novel quality metrics is introduced, property coverage (PC), which allows, with affordable computational effort, to have a measure of the degree of confidence within which the property under evaluation holds. The proposed method uses fault sampling, and enables PC evaluation with limited fault list sizes. The methodology and associated metrics are ascertained through a case study, an ASIC for safety-critical Gas Burner control system, recently certified to be compliant to EN 298 safety standard.
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Design and Test of a Certifiable ASIC for a Safety-Critical Gas Burner Control System
Journal of Electronic Testing, 2002Co-Authors: F.m. Gonçalves, M. B. Santos, I.c. Teixeira, J.p. TeixeiraAbstract:The purpose of this paper is to present a methodology and tools for the design and test of an EN298 compliant ASIC chip for a safety-critical Gas Burner control system. Safe operation, as far as the critical variable is concerned, is guaranteed in the presence of two simultaneous faults. Emphasis is put on circumventing methodology, EDA (Electronic Design Automation) and foundry limitations and on product certification requirements.
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Self-checking and fault tolerance quality assessment using fault sampling
17th IEEE International Symposium on Defect and Fault Tolerance in VLSI Systems 2002. DFT 2002. Proceedings., 2002Co-Authors: F.m. Gonçalves, M.b. Santos, I.c. Teixeira, J.p. TeixeiraAbstract:The computational effort associated with fault simulation (FS) processes in digital systems can become overwhelming, due to circuit complexity, test pattern size or fault list size. The same applies when safety properties (such as fault tolerance or fail-safe) need to be verified in a new product development, in the design environment. If a bridging fault model replaces the simple stuck-at fault model, the fault list size easily becomes very large. If the product needs to comply to safety standards, such as EN298, these properties need to be verified in the presence of double faults, which explodes the fault list dimension. In this paper, a novel method is proposed to deal with this problem, based on fault sampling. A model to compute the confidence level that the global fault coverage, FC, is within the interval [FC/sub min/ 100%] is proposed. A case study, an ASIC for a safety-critical Gas Burner control system, is used to ascertain the usefulness of the proposed methodology.
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Design and test of certifiable ASICs for safety-critical Gas Burner control
Proceedings Seventh International On-Line Testing Workshop, 2001Co-Authors: F.m. Gonçalves, M. B. Santos, I.c. Teixeira, J.p. TeixeiraAbstract:The purpose of this paper is to present a methodology and tools for the design and test of a EN298 compliant ASIC chip for safety-critical Gas Burner control, Safe operation, as far as the critical variable is concerned, is guaranteed in the presence of two simultaneous bridging or open defects. Emphasis is put on circumventing methodology, EDA (electronic design automation) and foundry limitations and on product certification requirements.
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IOLTW - Design and test of certifiable ASICs for safety-critical Gas Burner control
Proceedings Seventh International On-Line Testing Workshop, 2001Co-Authors: F.m. Gonçalves, M. B. Santos, I.c. Teixeira, J.p. TeixeiraAbstract:The purpose of this paper is to present a methodology and tools for the design and test of a EN298 compliant ASIC chip for safety-critical Gas Burner control, Safe operation, as far as the critical variable is concerned, is guaranteed in the presence of two simultaneous bridging or open defects. Emphasis is put on circumventing methodology, EDA (electronic design automation) and foundry limitations and on product certification requirements.
J.p. Teixeira - One of the best experts on this subject based on the ideXlab platform.
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Design and Test of a Certifiable ASIC for a Safety-Critical Gas Burner Control System
Journal of Electronic Testing, 2002Co-Authors: F.m. Gonçalves, M. B. Santos, I.c. Teixeira, J.p. TeixeiraAbstract:The purpose of this paper is to present a methodology and tools for the design and test of an EN298 compliant ASIC chip for a safety-critical Gas Burner control system. Safe operation, as far as the critical variable is concerned, is guaranteed in the presence of two simultaneous faults. Emphasis is put on circumventing methodology, EDA (Electronic Design Automation) and foundry limitations and on product certification requirements.
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Design and test of certifiable ASICs for safety-critical Gas Burner control
Proceedings Seventh International On-Line Testing Workshop, 2001Co-Authors: F.m. Gonçalves, M. B. Santos, I.c. Teixeira, J.p. TeixeiraAbstract:The purpose of this paper is to present a methodology and tools for the design and test of a EN298 compliant ASIC chip for safety-critical Gas Burner control, Safe operation, as far as the critical variable is concerned, is guaranteed in the presence of two simultaneous bridging or open defects. Emphasis is put on circumventing methodology, EDA (electronic design automation) and foundry limitations and on product certification requirements.
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IOLTW - Design and test of certifiable ASICs for safety-critical Gas Burner control
Proceedings Seventh International On-Line Testing Workshop, 2001Co-Authors: F.m. Gonçalves, M. B. Santos, I.c. Teixeira, J.p. TeixeiraAbstract:The purpose of this paper is to present a methodology and tools for the design and test of a EN298 compliant ASIC chip for safety-critical Gas Burner control, Safe operation, as far as the critical variable is concerned, is guaranteed in the presence of two simultaneous bridging or open defects. Emphasis is put on circumventing methodology, EDA (electronic design automation) and foundry limitations and on product certification requirements.
Shuhn Shyurng Hou - One of the best experts on this subject based on the ideXlab platform.
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Efficiency and emissions of a new domestic Gas Burner with a swirling flame
Energy Conversion and Management, 2007Co-Authors: Shuhn Shyurng Hou, Chien Hsiung Lee, Ta Hui LinAbstract:This experimental investigation is aimed at studying the influence of five significant parameters, namely swirl flow, loading height, primary aeration, Gas flow rate (heat input), Gas supply pressure and semi-confined combustion flame on thermal efficiency and CO emissions of domestic Gas Burners. We focus particularly on the effects of a swirling flame on the performance of the new swirl flow Burner (SB). The results showed that the swirl flow Burner (SB) yields higher thermal efficiency and emits only slightly higher CO concentration than those of the conventional radial flow Burner (RB). These characteristics are attributed to the significant improvement in heat transfer coefficient at the vessel bottom resulting from the prolonged residence time of the combustion products in the vicinity of the vessel bottom. With the increase of loading height, the CO emission decreases owing to the reduction of quenching by flame impingement on the load. However, at high loading height, the flame and combustion Gases are cooled to a greater extent by mixing with ambient air before contacting the loading vessel, and thus, the temperature gradient for heat transfer is decreased, which leads to the decrease of thermal efficiency. As the thermal input increases, the thermal efficiency is reduced and the CO emission increases. With increasing primary aeration, the CO emission is diminished, but the thermal efficiency is almost unaffected. Additionally, the addition of a shield (named semi-confined combustion flame) achieves a great increase in thermal efficiency. The thermal efficiency of the SB with the semi-confined combustion flame yields a markedly higher thermal efficiency, by about 12%, than that of the RB with open flame. ?? 2006 Elsevier Ltd. All rights reserved.
Panya Aroonjarattham - One of the best experts on this subject based on the ideXlab platform.
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The Parametric Study of High Pressure Gas Burner Affect Thermal Efficiency
Engineering Journal, 2016Co-Authors: Panya AroonjaratthamAbstract:The KB-5 high pressure Gas Burners were popularly and widely used in Thailand. This research was aimed to study the influence of four significant parameters, namely degrees of outer and inner ports and the number of outer and inner ports of high pressure Gas Burners, to the thermal efficiency by the experiments. The thermal efficiency was tested with reference to the standard industrial stoves in household with liquid petroleum Gas (TIS 2312-2549). The results were shown the increasing angles of the outer port increased 13% thermal efficiency, the increasing numbers of outer port increased 5% thermal efficiency and increasing the numbers of inner port increased 7% thermal efficiency from the factory’s model. The increasing angles of inner port had less effect on thermal efficiency. The improving of high pressure Gas Burner will have modified by increased the numbers of outer and inner port and the angles of the outer port for the higher thermal efficiency than the factory’s design.
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The Effects of High Pressure Gas Burner Parameters on Thermal Efficiency for 2014 International Conference on Machining, Materials and Mechanical Technology (IC3MT)
Key Engineering Materials, 2015Co-Authors: Suttikiat Srisathit, Panya AroonjaratthamAbstract:The KB 5 high pressure Gas Burners are popularly and widely used at the food stands in Thailand. The Gas Burner models are of various properties depending on the each factory’s design. The differences of the designs affect the Liquid Petroleum Gas (LPG) consumption to a different extent. This study aimed to evaluate the parameters: the degrees of outer and inner ports; and the number of outer and inner ports of high pressure Gas Burners which are sold in Thailand. The thermal efficiency was tested with reference to the Standard Industrial stoves in household with liquid petroleum Gas (TIS 2312-2549). The result showed that, by increasing the degrees of outer ports from 45 to 80, the thermal efficiency increased by 0.24%; while by increasing the degrees of inner ports from 50 to 60, the thermal efficiency increased 0.11%. By increasing the number of the outer ports from 35 to 38, the thermal efficiency increased 0.44%; while by increasing the number of inner ports from 9 to 15, the thermal efficiency increased by 0.22%. The development of high pressure Gas Burners should focus on adjusting the degrees and number of inner and outer ports for the overall improvement of the thermal efficiency.
