Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 234 views

    Digital Assignment For RAC

    Uploaded by

    Harikishore S
    This document contains 5 questions regarding refrigeration systems and air conditioning: 1. It provides data on a refrigeration system using F12 between temperatures of -18C and 37C, and asks to calculate the plant capacity, required power, and COP. 2. It gives conditions for a simple F12 refrigeration cycle with a 10 ton load, and asks to find the refrigerant flow rate, required power, and COP. 3. It gives pressure and temperature data for a vapor compression cycle, and asks to find the COP and capacity at a refrigerant flow rate of 5 kg/min. 4. It provides atmospheric conditions and asks to calculate partial vapor pressure, relative humidity, and de

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd

    Digital Assignment For RAC

    Uploaded by

    Harikishore S
    234 views2 pages
    This document contains 5 questions regarding refrigeration systems and air conditioning: 1. It provides data on a refrigeration system using F12 between temperatures of -18C and 37C, and asks to calculate the plant capacity, required power, and COP. 2. It gives conditions for a simple F12 refrigeration cycle with a 10 ton load, and asks to find the refrigerant flow rate, required power, and COP. 3. It gives pressure and temperature data for a vapor compression cycle, and asks to find the COP and capacity at a refrigerant flow rate of 5 kg/min. 4. It provides atmospheric conditions and asks to calculate partial vapor pressure, relative humidity, and de

    Original Description:

    Refrigeration And Conditioning Questions

    Original Title

    Digital Assignment for RAC

    Copyright

    © © All Rights Reserved

    Available Formats

    DOCX, PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    This document contains 5 questions regarding refrigeration systems and air conditioning: 1. It provides data on a refrigeration system using F12 between temperatures of -18C and 37C, and asks to calculate the plant capacity, required power, and COP. 2. It gives conditions for a simple F12 refrigeration cycle with a 10 ton load, and asks to find the refrigerant flow rate, required power, and COP. 3. It gives pressure and temperature data for a vapor compression cycle, and asks to find the COP and capacity at a refrigerant flow rate of 5 kg/min. 4. It provides atmospheric conditions and asks to calculate partial vapor pressure, relative humidity, and de

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    234 views2 pages

    Digital Assignment For RAC

    Uploaded by

    Harikishore S
    This document contains 5 questions regarding refrigeration systems and air conditioning: 1. It provides data on a refrigeration system using F12 between temperatures of -18C and 37C, and asks to calculate the plant capacity, required power, and COP. 2. It gives conditions for a simple F12 refrigeration cycle with a 10 ton load, and asks to find the refrigerant flow rate, required power, and COP. 3. It gives pressure and temperature data for a vapor compression cycle, and asks to find the COP and capacity at a refrigerant flow rate of 5 kg/min. 4. It provides atmospheric conditions and asks to calculate partial vapor pressure, relative humidity, and de

    Copyright:

    © All Rights Reserved
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    of 2

    Digital Assignment

    1. A refrigerating machine using F12 as working fluid works between the temperatures -
    180C and 370C is 78 kj/kg. The enthalpies of F12 entering the leaving the compressor are
    200kj/kg and 238 kj/kg respectively. The rate of circulation of refrigerant is 2 kg/min and
    efficiency of compressor is 0.85. Determine:

    i. Capacity of the plant in tons if refrigeration

    ii. power required to run the plant

    iii. COP

    2. A simple saturation cycle using F-12 is designed for taking a load of 10 tons. The
    refrigerator and ambient temperatures are -00C and 300C respectively. A minimum
    temperature difference of 50C is required in evaporator and condenser for heat transfer.
    Find i) mass flow rate of refrigerant ii) power required and iii) COP.
    3. A vapour compression refrigerator works between the pressure limits of 60 bar and 25
    bar. The working fluid is just dry at the end of the compression and there is no under
    cooling of the liquid before the expansion valve. Determine:

    1. C O P of the cycle and

    2. Capacity of the refrigerator if the fluid flow is at the rate of 5


    kg/min.

    Data:

    Pressure (bar) Saturation Temp (K) Enthalpy (kJ/kg) Entropy (kJ/jg.K)

    Liquid Vapour Liquid Vapour

    60 295 151.96 293.29 0.554 1.0332

    25 261 56.32 322.58 0.226 1.2464

    4. The atmospheric conditions are 250C DBT and specific humidity of 10 gm/kg of dry air.
    Determine the followings:
    a. Partial pressure of vapour
    b. Relative humidity
    c. Dew point temperature
    5. An air-conditioned plant to be designed for a small office room for winter conditions.
    Outdoor conditions =100C DBT and 80C WBT
    Required indoor conditions =200C DBT and 60% RH
    Amount of free air circulation =0.3 m3/min/person
    Seating capacity of the office =50
    The required condition is achieved fist by heating and then adiabatic humidifying. Find
    the followings:
    a. Heating capacity of the coil in KW and the surface temperature required if the by-
    pass factor of the coil is 0.32.
    b. The capacity of the humidifier

    You might also like