why does a desert cooler cool better on a hot dry day?
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❢❖❒ƛƝƧƜЄƦ❏❖❢
❥ᴏɴ ᴀ ʜᴏᴛ ᴅʀʏ ᴅᴀʏ, ᴛʜᴇ ᴀᴍᴏᴜɴᴛ ᴏꜰ ᴡᴀᴛᴇʀ ᴠᴀᴘᴏᴜʀ ᴘʀᴇꜱᴇɴᴛ ɪɴ ᴀɪʀ ɪꜱ ʟᴇꜱꜱ. ᴛʜᴜꜱ, ᴡᴀᴛᴇʀ ᴘʀᴇꜱᴇɴᴛ ɪɴꜱɪᴅᴇ ᴛʜᴇ ᴅᴇꜱᴇʀᴛ ᴄᴏᴏʟᴇʀ ᴇᴠᴀᴘᴏʀᴀᴛᴇꜱ ᴍᴏʀᴇ, ᴛʜᴇʀᴇʙʏ ᴄᴏᴏʟɪɴɢ ᴛʜᴇ ꜱᴜʀʀᴏᴜɴᴅɪɴɢꜱ ᴍᴏʀᴇ. ᴛʜᴀᴛ ɪꜱ ᴡʜʏ ᴀ ᴅᴇꜱᴇʀᴛ ᴄᴏᴏʟᴇʀ ᴄᴏᴏʟꜱ ʙᴇᴛᴛᴇʀ ᴏɴ ᴀ ʜᴏᴛ ᴅʀʏ ᴅᴀʏ.
⟲MƠƦЄ ƬƠ ƘƝƠƜ⟳
❥ᴅᴇꜱᴇʀᴛ ᴄᴏᴏʟᴇʀꜱ ᴀʀᴇ ʙᴀꜱᴇᴅ ᴏɴ ᴛʜᴇ ꜱɪᴍᴘʟᴇ ᴘʀɪɴᴄɪᴘʟᴇ ᴛʜᴀᴛ ᴡʜᴇɴ ᴜɴꜱᴀᴛᴜʀᴀᴛᴇᴅ ᴀɪʀ ᴄᴏᴍᴇꜱ ɪɴ ᴄᴏɴᴛᴀᴄᴛ ᴡɪᴛʜ ᴡᴀᴛᴇʀ, ᴛʜᴇ ᴡᴀᴛᴇʀ ᴇᴠᴀᴘᴏʀᴀᴛᴇꜱ. ɪɴ ᴛʜᴇ ᴘʀᴏᴄᴇꜱꜱ, ᴛʜᴇ ᴍᴏɪꜱᴛᴜʀᴇ ᴄᴏɴᴛᴇɴᴛ ᴏꜰ ᴀɪʀ ɪɴᴄʀᴇᴀꜱᴇꜱ, ᴡʜɪʟᴇ ɪᴛꜱ ᴛᴇᴍᴘᴇʀᴀᴛᴜʀᴇ ᴅᴇᴄʀᴇᴀꜱᴇꜱ. ᴛʜᴇ ʀᴇꜱᴜʟᴛɪɴɢ ᴄᴏʟᴅ ʙᴜᴛ ᴍᴏɪꜱᴛ ᴀɪʀ ɪꜱ ᴜꜱᴇᴅ ꜰᴏʀ ᴘʀᴏᴠɪᴅɪɴɢ ᴄᴏᴏʟɪɴɢ.
⟏ӇƠƤЄ ƖƬ ӇЄԼƤƧ Ʋ⟁
⟏ӇƛƔЄ ƛ ƓƦЄƛƬ ƊƛƳ⟁
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On a hot dry day rate of evaporation is faster. In a desert cooler when exhaust fan is on, hot air enters through the straw mates and at this site evaporation of water takes place and that also at faster rate. It takes away heat from air so the air becomes cool even cooler on a hot dry day.
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