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  1. [1]
    reyas91
    reyas91 غير متواجد حالياً

    عضو

    تاريخ التسجيل: Aug 2006
    المشاركات: 45
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    help..help

    انا بحاجه لشرح مفصل عن المبادلات الحراريه لانه مطلوب مننا عمل نموذج لمبادل حراري بأسع وقت......... ايضا احتاج لم علوملت عن طريقة حساب العدد الأوكتاني بالطريقتين : المحرك والبحثيه

  2. [2]
    وليد محمود مغاته
    وليد محمود مغاته غير متواجد حالياً
    عضو فعال


    تاريخ التسجيل: Mar 2007
    المشاركات: 80
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    there are more and more

    in my company
    there are
    Waste Heat Boiler
    High pressure Super heater
    Economizer
    Hot Interpass Heat Exchanger
    most of above Shell And Tube
    Eng .Waleed2006
    rememeber MCp dT=mcpdt

    0 Not allowed!



  3. [3]
    Eng. ZiZO
    Eng. ZiZO غير متواجد حالياً
    جديد


    تاريخ التسجيل: Mar 2007
    المشاركات: 4
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    Received: 0
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    Shell and Tube heat exchanger
    A typical heat exchanger, usually for higher-pressure applications, is the shell and tube heat exchanger which consists of a series of finned tubes, through which one of the fluids runs. The second fluid runs over the finned tubes to be heated or cooled.

    Plate heat exchanger

    Another type of heat exchanger is the plate heat exchanger. One is composed of multiple, thin, slightly-separated plates that have very large surface areas and fluid flow passages for heat transfer. This stacked-plate arrangement can be more effective, in a given space, than the shell and tube heat exchanger. Advances in gasket and brazing technology have made the plate type heat exchanger increasingly practical. In HVAC applications, large heat exchangers of this type are called plate-and-frame; when used in open loops, these heat exchangers are normally of the gasketed type to allow periodic disassembly, cleaning, and inspection. There are many types of permanently-bonded plate heat exchangers such as dip-brazed and vacuum-brazed plate varieties, and they are often specified for closed-loop applications such as refrigeration. Plate heat exchangers also differ in the types of plates that are used, and the configurations of those plates. Some plates may be stamped with "chevron" or other patterns, where others may have machined fins and/or grooves.

    Regenerative heat exchanger

    A third type of heat exchanger is the regenerative heat exchanger. In this, the heat from a process is used to warm the fluids to be used in the process, and the same type of fluid is used either side of the heat exchanger. (These heat exchangers can be either plate and frame or shell and tube construction.) Also see: Countercurrent exchange, Regenerator, Economizer

    Adiabatic Wheel heat exchanger

    A fourth type of heat exchanger uses an intermediate fluid or solid store to hold heat, which is then moved to the other side of the heat exchanger to be released. Two examples of this are adiabatic wheels, which consist of a large wheel with fine threads rotating through the hot and cold fluids, and fluid heat exchangers. This type is used when it is acceptable for a small amount of mixing to occur between the two streams.

    Fluid heat exchangers

    This is a heat exchanger with a gas passing upwards through a shower of fluid (often water), and the water then taken elsewhere before being cooled. This is commonly used for cooling gases whilst also removing certain impurities, thus solving two problems at once.

    Dynamic Scraped surface heat exchanger

    Another type of heat exchanger is called dynamic heat exchanger or scraped surface heat exchanger. This is mainly used for heating or cooling with high viscosity products, crystallization processes, evaporation and high fouling applications. Long running times are achieved due to the continuous scraping of the surface, thus avoiding fouling and achieving a sustainable heat transfer rate during the process.

    0 Not allowed!



  4. [4]
    Eng. ZiZO
    Eng. ZiZO غير متواجد حالياً
    جديد


    تاريخ التسجيل: Mar 2007
    المشاركات: 4
    Thumbs Up
    Received: 0
    Given: 0
    Shell and Tube heat exchanger
    A typical heat exchanger, usually for higher-pressure applications, is the shell and tube heat exchanger which consists of a series of finned tubes, through which one of the fluids runs. The second fluid runs over the finned tubes to be heated or cooled.

    Plate heat exchanger

    Another type of heat exchanger is the plate heat exchanger. One is composed of multiple, thin, slightly-separated plates that have very large surface areas and fluid flow passages for heat transfer. This stacked-plate arrangement can be more effective, in a given space, than the shell and tube heat exchanger. Advances in gasket and brazing technology have made the plate type heat exchanger increasingly practical. In HVAC applications, large heat exchangers of this type are called plate-and-frame; when used in open loops, these heat exchangers are normally of the gasketed type to allow periodic disassembly, cleaning, and inspection. There are many types of permanently-bonded plate heat exchangers such as dip-brazed and vacuum-brazed plate varieties, and they are often specified for closed-loop applications such as refrigeration. Plate heat exchangers also differ in the types of plates that are used, and the configurations of those plates. Some plates may be stamped with "chevron" or other patterns, where others may have machined fins and/or grooves.

    Regenerative heat exchanger

    A third type of heat exchanger is the regenerative heat exchanger. In this, the heat from a process is used to warm the fluids to be used in the process, and the same type of fluid is used either side of the heat exchanger. (These heat exchangers can be either plate and frame or shell and tube construction.) Also see: Countercurrent exchange, Regenerator, Economizer

    Adiabatic Wheel heat exchanger

    A fourth type of heat exchanger uses an intermediate fluid or solid store to hold heat, which is then moved to the other side of the heat exchanger to be released. Two examples of this are adiabatic wheels, which consist of a large wheel with fine threads rotating through the hot and cold fluids, and fluid heat exchangers. This type is used when it is acceptable for a small amount of mixing to occur between the two streams.

    Fluid heat exchangers

    This is a heat exchanger with a gas passing upwards through a shower of fluid (often water), and the water then taken elsewhere before being cooled. This is commonly used for cooling gases whilst also removing certain impurities, thus solving two problems at once.

    Dynamic Scraped surface heat exchanger

    Another type of heat exchanger is called dynamic heat exchanger or scraped surface heat exchanger. This is mainly used for heating or cooling with high viscosity products, crystallization processes, evaporation and high fouling applications. Long running times are achieved due to the continuous scraping of the surface, thus avoiding fouling and achieving a sustainable heat transfer rate during the process.

    0 Not allowed!



  5. [5]
    Eng. ZiZO
    Eng. ZiZO غير متواجد حالياً
    جديد


    تاريخ التسجيل: Mar 2007
    المشاركات: 4
    Thumbs Up
    Received: 0
    Given: 0
    Shell and Tube heat exchanger
    A typical heat exchanger, usually for higher-pressure applications, is the shell and tube heat exchanger which consists of a series of finned tubes, through which one of the fluids runs. The second fluid runs over the finned tubes to be heated or cooled.

    Plate heat exchanger

    Another type of heat exchanger is the plate heat exchanger. One is composed of multiple, thin, slightly-separated plates that have very large surface areas and fluid flow passages for heat transfer. This stacked-plate arrangement can be more effective, in a given space, than the shell and tube heat exchanger. Advances in gasket and brazing technology have made the plate type heat exchanger increasingly practical. In HVAC applications, large heat exchangers of this type are called plate-and-frame; when used in open loops, these heat exchangers are normally of the gasketed type to allow periodic disassembly, cleaning, and inspection. There are many types of permanently-bonded plate heat exchangers such as dip-brazed and vacuum-brazed plate varieties, and they are often specified for closed-loop applications such as refrigeration. Plate heat exchangers also differ in the types of plates that are used, and the configurations of those plates. Some plates may be stamped with "chevron" or other patterns, where others may have machined fins and/or grooves.

    Regenerative heat exchanger

    A third type of heat exchanger is the regenerative heat exchanger. In this, the heat from a process is used to warm the fluids to be used in the process, and the same type of fluid is used either side of the heat exchanger. (These heat exchangers can be either plate and frame or shell and tube construction.) Also see: Countercurrent exchange, Regenerator, Economizer

    Adiabatic Wheel heat exchanger

    A fourth type of heat exchanger uses an intermediate fluid or solid store to hold heat, which is then moved to the other side of the heat exchanger to be released. Two examples of this are adiabatic wheels, which consist of a large wheel with fine threads rotating through the hot and cold fluids, and fluid heat exchangers. This type is used when it is acceptable for a small amount of mixing to occur between the two streams.

    Fluid heat exchangers

    This is a heat exchanger with a gas passing upwards through a shower of fluid (often water), and the water then taken elsewhere before being cooled. This is commonly used for cooling gases whilst also removing certain impurities, thus solving two problems at once.

    Dynamic Scraped surface heat exchanger

    Another type of heat exchanger is called dynamic heat exchanger or scraped surface heat exchanger. This is mainly used for heating or cooling with high viscosity products, crystallization processes, evaporation and high fouling applications. Long running times are achieved due to the continuous scraping of the surface, thus avoiding fouling and achieving a sustainable heat transfer rate during the process.

    0 Not allowed!



  6. [6]
    Eng. ZiZO
    Eng. ZiZO غير متواجد حالياً
    جديد


    تاريخ التسجيل: Mar 2007
    المشاركات: 4
    Thumbs Up
    Received: 0
    Given: 0
    Shell and Tube heat exchanger
    A typical heat exchanger, usually for higher-pressure applications, is the shell and tube heat exchanger which consists of a series of finned tubes, through which one of the fluids runs. The second fluid runs over the finned tubes to be heated or cooled.

    Plate heat exchanger

    Another type of heat exchanger is the plate heat exchanger. One is composed of multiple, thin, slightly-separated plates that have very large surface areas and fluid flow passages for heat transfer. This stacked-plate arrangement can be more effective, in a given space, than the shell and tube heat exchanger. Advances in gasket and brazing technology have made the plate type heat exchanger increasingly practical. In HVAC applications, large heat exchangers of this type are called plate-and-frame; when used in open loops, these heat exchangers are normally of the gasketed type to allow periodic disassembly, cleaning, and inspection. There are many types of permanently-bonded plate heat exchangers such as dip-brazed and vacuum-brazed plate varieties, and they are often specified for closed-loop applications such as refrigeration. Plate heat exchangers also differ in the types of plates that are used, and the configurations of those plates. Some plates may be stamped with "chevron" or other patterns, where others may have machined fins and/or grooves.

    Regenerative heat exchanger

    A third type of heat exchanger is the regenerative heat exchanger. In this, the heat from a process is used to warm the fluids to be used in the process, and the same type of fluid is used either side of the heat exchanger. (These heat exchangers can be either plate and frame or shell and tube construction.) Also see: Countercurrent exchange, Regenerator, Economizer

    Adiabatic Wheel heat exchanger

    A fourth type of heat exchanger uses an intermediate fluid or solid store to hold heat, which is then moved to the other side of the heat exchanger to be released. Two examples of this are adiabatic wheels, which consist of a large wheel with fine threads rotating through the hot and cold fluids, and fluid heat exchangers. This type is used when it is acceptable for a small amount of mixing to occur between the two streams.

    Fluid heat exchangers

    This is a heat exchanger with a gas passing upwards through a shower of fluid (often water), and the water then taken elsewhere before being cooled. This is commonly used for cooling gases whilst also removing certain impurities, thus solving two problems at once.

    Dynamic Scraped surface heat exchanger

    Another type of heat exchanger is called dynamic heat exchanger or scraped surface heat exchanger. This is mainly used for heating or cooling with high viscosity products, crystallization processes, evaporation and high fouling applications. Long running times are achieved due to the continuous scraping of the surface, thus avoiding fouling and achieving a sustainable heat transfer rate during the process.

    0 Not allowed!



  
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