?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=KARAKTERISTIK+PERPINDAHAN+KALOR+PADA+MATERIAL%0D%0ABERUBAH+FASA+BERUPA+PARAFIN+DI+DALAM+ALAT+PENUKAR%0D%0A%0D%0AKALOR+SEBAGAI+PENDINGINAN+UDARA&rft.creator=MARDLO+AKMAL%2C+1415021056&rft.subject=620+Ilmu+teknik+dan+ilmu+yang+berkaitan&rft.description=Konsumsi+energi+pada+sebuah+bangunan+sebagian+besar+digunakan+untuk+sistem%0D%0Apengkondisian+udara+(air+conditioning+disingkat+AC).+Solusi+alternatif+untuk%0D%0Amengurangi+besarnya+konsumsi+energi+AC+yaitu+dengan+meningkatkan+efisiensi%0D%0Asistem+dan+mengurangi+besarnya+beban+pendinginan.+Di+Indonesia+temperatur+udara%0D%0Adingin+pada+malam+hari+dinilai+memiliki+potensi+untuk+membantu+mendinginkan%0D%0Aruangan.+Salah+satunya+yaitu+menggunakan+material+berubah+fasa+(phase+change%0D%0Amaterial+disingkat+PCM).+PCM+digunakan+untuk+menyimpan+energi+panas+dalam%0D%0Ajumlah+yang+besar+dengan+memanfaatkan+panas+laten+yang+terjadi+pada+saat%0D%0Amaterial+berubah+fasa.+Udara+dingin+pada+malam+hari+dimanfaatkan+untuk+proses%0D%0Apembekuan+PCM+kemudian+pada+siang+hari+PCM+dapat+dimanfaatkan+untuk%0D%0Amenyerap+energi+termal+pada+ruangan.+Untuk+mengetahui+pengaruh+temperatur%0D%0Audara+dingin+terhadap+karakteristik+perpindahan+kalor+PCM+pada+proses+pembekuan%0D%0Adilakukan+pengujian.+Pengujian+ini+dilakukan+menggunakan+2+alat+penukar+kalor%0D%0Ayang+berbeda+yaitu+alat+penukar+kalor+tipe+double+helical+coil+dan+alat+penukar+kalor%0D%0A%0D%0Aiii%0D%0A%0D%0Atipe+staggered+fin.Variable+yang+digunakan+adalah+kecepatan+udara+dan+temperatur%0D%0Audara+dingin+masuk+alat+penukar+kalor.+Pengujian+ini+tidak+membandingkan%0D%0Akarakteristik+perpindahan+kalor+PCM+pada+kedua+alat+penukar+kalor%2C+tetapi%0D%0A%0D%0Aditujukan+untuk+mengetahui+karakteristik+perpindahan+kalor+PCM+pada+masing-%0D%0Amasing+alat+penukar+kalor.+Hasil+dari+uji+pembekuan+PCM+menunjukkan+bahwa%0D%0A%0D%0Apeningkatan+kecepatan+udara+dan+penurunan+temperatur+udara+dingin+masuk%0D%0Ameningkatkan+laju+pendinginan+PCM+pada+alat+penukar+kalor+dan+memperbesar%0D%0Apersentase+padatan+yang+terbentuk.+Aliran+udara+yang+melewati+alat+penukar+kalor%0D%0Amengalami+rugi-rugi+aliran+yang+berdampak+pada+kebutuhan+fannya.+Hasil-hasil%0D%0Apenelitian+secara+rinci+dalam+pembahasan+skripsi+ini.%0D%0A%0D%0AKata+kunci%3A+AC%2C+PCM%2C+kalor+laten%2C+double+helical+coil%2C+staggered+fin%0D%0AEnergy+consumption+in+a+building+is+mostly+used+for+air+conditioning+systems+(air%0D%0Aconditioning+abbreviated+as+AC).+An+alternative+solution+to+reduce+the+amount+of%0D%0AAC+energy+consumption+is+by+increasing+system+efficiency+and+reducing+the+amount%0D%0Aof+cooling+load.+In+Indonesia+the+temperature+of+cold+air+at+night+is+considered+to%0D%0Ahave+the+potential+to+help+cool+the+room.+One+of+them+is+using+phase+change+material%0D%0Aphase+change+material+(PCM).+PCM+is+used+to+store+large+amounts+of+heat+energy%0D%0Aby+utilizing+latent+heat+that+occurs+when+the+material+changes+phase.+Cold+air+at%0D%0Anight+is+used+for+the+freezing+process+of+PCM+then+during+the+day+PCM+can+be+used%0D%0Ato+absorb+thermal+energy+in+the+room.+To+determine+the+effect+of+cold+air%0D%0Atemperature+on+the+characteristics+of+PCM+heat+transfer+in+the+freezing+process+was%0D%0Atested.+This+test+is+carried+out+using+2+different+heat+exchanger%2C+namely+double%0D%0Ahelical+coil+heat+exchanger+and+staggered+fin+heat+exchanger.+variable+used+is+air%0D%0Avelocity+and+cold+air+temperature+in+a+heat+exchanger.+This+test+does+not+compare%0D%0Athe+characteristics+of+PCM+heat+transfer+in+both+heat+exchangers%2C+but+is+intended+to%0D%0A%0D%0Av%0D%0A%0D%0Adetermine+the+characteristics+of+PCM+heat+transfer+in+each+heat+exchanger.+The%0D%0Aresults+of+the+PCM+freezing+test+indicate+that+an+increase+in+air+velocity+and+a%0D%0Adecrease+in+cold+air+temperature+increase+the+PCM+cooling+rate+in+the+heat%0D%0Aexchanger+and+increase+the+percentage+of+solids+formed.+The+air+flow+through+the%0D%0Aheat+exchanger+experiences+flow+losses+which+have+an+impact+on+the+fan's+needs.%0D%0AThe+results+of+the+study+in+detail+in+the+discussion+of+this+thesis.%0D%0A%0D%0AKeywords%3A+AC%2C+PCM%2C+latent+heat%2C+double+helical+coil%2C+staggered+fin&rft.publisher=FAKULTAS+TEKNIK&rft.date=2019&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F57260%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F57260%2F2%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F57260%2F3%2FSKRIPSI%2520TANPA%2520BAB%2520PEMBAHASAN.pdf&rft.identifier=++MARDLO+AKMAL%2C+1415021056++(2019)+KARAKTERISTIK+PERPINDAHAN+KALOR+PADA+MATERIAL+BERUBAH+FASA+BERUPA+PARAFIN+DI+DALAM+ALAT+PENUKAR+KALOR+SEBAGAI+PENDINGINAN+UDARA.++FAKULTAS+TEKNIK%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F57260%2F