The Experts below are selected from a list of 1233 Experts worldwide ranked by ideXlab platform

Clito Afonso - One of the best experts on this subject based on the ideXlab platform.

  • Air infiltration in domestic refrigerators: The influence of the Magnetic Seals conservation
    International Journal of Refrigeration, 2010
    Co-Authors: Clito Afonso, Manuel Castro
    Abstract:

    Abstract One component of the heat exchange rate in domestic refrigerators/freezers and of the other all types of refrigeration stores is the air infiltration due to the air exchange rate between inside and outside of the store trough the Magnetic Seals of the doors. Due to their use (opening and closing the doors) they become leaky with the time. So, it is necessary to know to measure them in a proper way in order to be able to quantify which percentage of the energy consumption of the compressor is used to overcome the air infiltration rate. In this work the tracer gas technique was used for the measurement of the air infiltration rate in a household double door commercial refrigerator. Through several tests carried out it was possible to analyse the influence of the Magnetic Seal conservation condition on the air exchange rates of the refrigerator. It was concluded that the air infiltration rates were strongly dependent on the door Seals conservation conditions.

  • THE INFLUENCE OF THE Magnetic SealS CONSERVATION ON THE ENERGY CONSUMPTION OF DOMESTIC REFRIGERATORS
    2009
    Co-Authors: Clito Afonso
    Abstract:

    SYNOPSIS One component of the heat exchange rate in domestic refrigerators/freezers and of the other all types of refrigeration stores is the air infiltration due to the air exchange rate between inside and outside of the store trough the Magnetic Seals of the doors. Due to their use (opening and closing the doors) they become leaky with the time. So, it is necessary to know to measure them in a proper way in order to be able to quantify which percentage of the energy consumption of the compressor is used to overcome the air infiltration rate. In this work the tracer gas technique was used for the measurement of the air infiltration rate in a household double door commercial refrigerator. Through several tests carried out it was possible to analyse the influence of the Magnetic Seal conservation condition on the air exchange rates of the refrigerator. It was concluded that the air infiltration rates were strongly dependent on the door Seals conservation conditions.

  • Air Infiltration: a Key Issue on Household Refrigerators
    2008
    Co-Authors: Clito Afonso, Manuel Castro
    Abstract:

    One important vector for a sustainable growth of our planet is the air ventilation due to the large amounts of energy spent. When speaking about ventilation, the main thought is concerned with buildings. However, there is one more important sector, besides the building one, where a special attention is due: the refrigeration sector. The cooling of the outside air due to the air infiltration on refrigeration stores can consume also a large amount of energy. Read these notes carefully all the way through and follow them as precisely as possible. In this work several measurements were carried out on a common household refrigerator in order to find the air exchange rate trough the Magnetic Seal of the door. Tests were realized with a new and an old door Seal. The main conclusion to withdraw is that the air infiltration rate on the refrigerator increases very fast as it becomes old, increasing in that way the energy consumption of the refrigerator.

Jie Yao - One of the best experts on this subject based on the ideXlab platform.

  • influence of viscosity and magnetoviscous effect on the performance of a Magnetic fluid Seal in a water environment
    Tribology Transactions, 2018
    Co-Authors: Yibiao Chen, Yilong Yang, Jie Yao
    Abstract:

    ABSTRACTThe Magnetic fluid Seal is one of the most successful applications of Magnetic fluids. The theory of Magnetic fluid Seals in liquid environments has not been developed. This work mainly presents an experimental study of the influence of viscosity and magnetoviscous effects on the performance of a Magnetic fluid Seal in a water environment. Three engine oil–based Magnetic fluids of different viscosities and similar saturation magnetization values were prepared and a multistage Magnetic Seal structure was designed. The magnetoviscous effect of the Magnetic fluids under different working conditions was measured with an advanced rotational rheometer. An experimental platform and a multistage Magnetic Seal structure were designed for the critical pressure value and durability tests. The experimental results show that the viscosity of a Magnetic fluid is a decisive factor in its Sealing performance under a water environment and a discussion is presented that can explain the experimental results qualitat...

  • Influence of Viscosity and Magnetoviscous Effect on the Performance of a Magnetic Fluid Seal in a Water Environment
    2017
    Co-Authors: Yibiao Chen, Yilong Yang, Jie Yao
    Abstract:

    The Magnetic fluid Seal is one of the most successful applications of Magnetic fluids. The theory of Magnetic fluid Seals in liquid environments has not been developed. This work mainly presents an experimental study of the influence of viscosity and magnetoviscous effects on the performance of a Magnetic fluid Seal in a water environment. Three engine oil–based Magnetic fluids of different viscosities and similar saturation magnetization values were prepared and a multistage Magnetic Seal structure was designed. The magnetoviscous effect of the Magnetic fluids under different working conditions was measured with an advanced rotational rheometer. An experimental platform and a multistage Magnetic Seal structure were designed for the critical pressure value and durability tests. The experimental results show that the viscosity of a Magnetic fluid is a decisive factor in its Sealing performance under a water environment and a discussion is presented that can explain the experimental results qualitatively.

Manuel Castro - One of the best experts on this subject based on the ideXlab platform.

  • Air infiltration in domestic refrigerators: The influence of the Magnetic Seals conservation
    International Journal of Refrigeration, 2010
    Co-Authors: Clito Afonso, Manuel Castro
    Abstract:

    Abstract One component of the heat exchange rate in domestic refrigerators/freezers and of the other all types of refrigeration stores is the air infiltration due to the air exchange rate between inside and outside of the store trough the Magnetic Seals of the doors. Due to their use (opening and closing the doors) they become leaky with the time. So, it is necessary to know to measure them in a proper way in order to be able to quantify which percentage of the energy consumption of the compressor is used to overcome the air infiltration rate. In this work the tracer gas technique was used for the measurement of the air infiltration rate in a household double door commercial refrigerator. Through several tests carried out it was possible to analyse the influence of the Magnetic Seal conservation condition on the air exchange rates of the refrigerator. It was concluded that the air infiltration rates were strongly dependent on the door Seals conservation conditions.

  • Air Infiltration: a Key Issue on Household Refrigerators
    2008
    Co-Authors: Clito Afonso, Manuel Castro
    Abstract:

    One important vector for a sustainable growth of our planet is the air ventilation due to the large amounts of energy spent. When speaking about ventilation, the main thought is concerned with buildings. However, there is one more important sector, besides the building one, where a special attention is due: the refrigeration sector. The cooling of the outside air due to the air infiltration on refrigeration stores can consume also a large amount of energy. Read these notes carefully all the way through and follow them as precisely as possible. In this work several measurements were carried out on a common household refrigerator in order to find the air exchange rate trough the Magnetic Seal of the door. Tests were realized with a new and an old door Seal. The main conclusion to withdraw is that the air infiltration rate on the refrigerator increases very fast as it becomes old, increasing in that way the energy consumption of the refrigerator.

Yibiao Chen - One of the best experts on this subject based on the ideXlab platform.

  • influence of viscosity and magnetoviscous effect on the performance of a Magnetic fluid Seal in a water environment
    Tribology Transactions, 2018
    Co-Authors: Yibiao Chen, Yilong Yang, Jie Yao
    Abstract:

    ABSTRACTThe Magnetic fluid Seal is one of the most successful applications of Magnetic fluids. The theory of Magnetic fluid Seals in liquid environments has not been developed. This work mainly presents an experimental study of the influence of viscosity and magnetoviscous effects on the performance of a Magnetic fluid Seal in a water environment. Three engine oil–based Magnetic fluids of different viscosities and similar saturation magnetization values were prepared and a multistage Magnetic Seal structure was designed. The magnetoviscous effect of the Magnetic fluids under different working conditions was measured with an advanced rotational rheometer. An experimental platform and a multistage Magnetic Seal structure were designed for the critical pressure value and durability tests. The experimental results show that the viscosity of a Magnetic fluid is a decisive factor in its Sealing performance under a water environment and a discussion is presented that can explain the experimental results qualitat...

  • Influence of Viscosity and Magnetoviscous Effect on the Performance of a Magnetic Fluid Seal in a Water Environment
    2017
    Co-Authors: Yibiao Chen, Yilong Yang, Jie Yao
    Abstract:

    The Magnetic fluid Seal is one of the most successful applications of Magnetic fluids. The theory of Magnetic fluid Seals in liquid environments has not been developed. This work mainly presents an experimental study of the influence of viscosity and magnetoviscous effects on the performance of a Magnetic fluid Seal in a water environment. Three engine oil–based Magnetic fluids of different viscosities and similar saturation magnetization values were prepared and a multistage Magnetic Seal structure was designed. The magnetoviscous effect of the Magnetic fluids under different working conditions was measured with an advanced rotational rheometer. An experimental platform and a multistage Magnetic Seal structure were designed for the critical pressure value and durability tests. The experimental results show that the viscosity of a Magnetic fluid is a decisive factor in its Sealing performance under a water environment and a discussion is presented that can explain the experimental results qualitatively.

Yong Tao Yuan - One of the best experts on this subject based on the ideXlab platform.

  • Designing on Magnetic Seal Ash-Unloader without Abrasion
    Advanced Materials Research, 2010
    Co-Authors: Yong Tao Yuan
    Abstract:

    The rigid Seals currently being used for the ash unloading device with the impeller under the hopper of the electrostatic precipitator are easy targets of wear and tear. In addition, the airproof capability of these Seals is not perfect. In this light, an advanced powder Magnetic Seal design which installs permanent magnets at the top of the vane and utilizes the magnetism of Fe3O4 in fly ash to Seal the space between two vanes is discussed in this paper. In the self-designed device, three categories of permanent magnet parameters and four kinds of powders with respective with respective Magnetic powder mass fractions of 7%, 9%, 12%, and 15% were chosen. The airproof capability was also measured. The results show that this device has excellent airproof capability, can withstand wear and tear, and has a low replacement frequency.

  • Experimental Study on Ash-unloader for Magnetic Seal without Abrasion
    Challenges of Power Engineering and Environment, 2007
    Co-Authors: Yong Tao Yuan, Qian Yang, Jing Liu
    Abstract:

    The rigid Seals used currently for ash unloading device with impeller under hopper of electrostatic precipitator are easy to wear and airproof capability isn’t perfect, so an advanced powder Magnetic Seal design that installs permanent magnets at the top of vane and utilizes the magnetism of Fe3O4 in fly ash to Seal the space between two vanes has been discussed. In this device, three categories of parameters of permanent magnets and four kinds of powders whose mass fraction of Magnetic powder is 7%, 9%, 12% and 15% respectively have been chosen, and the airproof capability has been experimented. The results show that this device has well airproof capability, doesn’t wear, and needn’t frequent replacement.