How to make an air-conditioner for really hotdays!

Ramani Aswath

Ramani Aswath

@ramani-VR4O43 • Oct 26, 2024
Appears trivial. However, good bit (Crazy of course) of chemical engineering here:

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  • Koushal Patel

    Koushal Patel

    @koushal-C6mEgp • Mar 19, 2015

    Awesome! 😀

    #-Link-Snipped-# - Sir, do you have any way to slow down the melting of ice? I guess, the caging itself slows down the process, but any extra medium that we can combine with? Thanks in advance.
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  • Ramani Aswath

    Ramani Aswath

    @ramani-VR4O43 • Mar 19, 2015

    Koushal Patel
    any way to slow down the melting of ice?
    If there is no air flow the thermocole box will slow down the ice melting. If the fan runs there is no escape from the mCp(delT) (airside) from melting an equivalent quantity of ice. Slowing the fan will slow it at the cost of reduced cooling.
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  • Koushal Patel

    Koushal Patel

    @koushal-C6mEgp • Mar 19, 2015

    #-Link-Snipped-# - Sir I was asking about any material which can be mixed with ice to slow down its melting. Is it possible?
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  • Ramani Aswath

    Ramani Aswath

    @ramani-VR4O43 • Mar 19, 2015

    Koushal Patel
    #-Link-Snipped-# - Sir I was asking about any material which can be mixed with ice to slow down its melting. Is it possible?
    The basic problem is that if any heat is added to ice it will melt consistent with its latent heat. In this case the fan is blowing outside warm air into the chamber. The higher temperature of the air melts the ice.
    Unfortunately, any addition to the water will depress the melting point leading to faster melting.
    This article will help to understand this:
    #-Link-Snipped-#
    Another:
    <a href="https://www.ibchem.com/root_pdf/melting_point_depression.pdf" target="_blank" rel="nofollow noopener noreferrer">PDF</a>
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  • Ankita Katdare

    Ankita Katdare

    @abrakadabra • Mar 19, 2015

    Koushal Patel
    #-Link-Snipped-# - Sir I was asking about any material which can be mixed with ice to slow down its melting. Is it possible?
    I have heard of salt OR pepper being added to salt to make it melt slower.
    Not sure if it's true. Here's a link:
    <a href="https://antoine.frostburg.edu/chem/senese/101/solutions/faq/why-salt-cools-icewater.shtml" target="_blank" rel="noopener noreferrer">General Chemistry Online: FAQ: Solutions: Why can adding salt to ice water make the ice melt slower?</a>
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  • Ramani Aswath

    Ramani Aswath

    @ramani-VR4O43 • Mar 20, 2015

    Ankita Katdare
    to make it melt slower.
    Not really. What is said in the reference is the same mentioned in my post. Adding salt lowers the melting point, does not affect the amount melted.
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  • sudharsansrinivas

    sudharsansrinivas

    @sudharsansrinivas-2owsk3 • Apr 11, 2015

    AS AKNITHA SAID IS CORRECT ADDING SALT TO ICE IT LOWER THE MELTING POINT I HAD DONE IT practically 😀
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  • Ramani Aswath

    Ramani Aswath

    @ramani-VR4O43 • Apr 11, 2015

    sudharsansrinivas
    AS AKNITHA SAID IS CORRECT ADDING SALT TO ICE IT LOWER THE MELTING POINT I HAD DONE IT practically 😀
    The total cooling capacity is still invariant. The latent heat does not change.
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