![subject](/tpl/images/cats/fizika.png)
Pada saat musim dingin, suhu udara di luar rumah adalah 5oC, dan suhu di dalam rumah adalah
10oC. Rumah tersebut di panaskan dengan mesin pemanas dengan system radiator dan
menggunakan steam sebagai fluida kerjanya. Untuk mendistribusikan udara panas, radiator
menggunakan kipas dan membutuhkan kerja 360 kJ/h. Panas yang hilang ke lingkungan akibat
proses perpindahan kalor adalah 5000 kJ/h. Hitung berapa waktu yang dibutuhkan untuk
memanaskan rumah tersebut menjadi 20oC. Analogi energy balance seperti pada gambar
dibawah ini.
Asumsi :
• Perubahan energi kinetic dan potensial diabaikan atau = 0
• Tekanan atmosfer 101 kPa
• Rumah di asumsikan tertutup sempurna dan tidak ada perpindahan massa dari rumah
ke lingkungan
• Mesin pemanas berjalan sempurna tanpa losses
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Answers: 3
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Pada saat musim dingin, suhu udara di luar rumah adalah 5oC, dan suhu di dalam rumah adalah
10oC. R...
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