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QUESTION [ Soalan ] You serve as an engineering consultant for a new phase in the heat transfer process of a power plant project while

QUESTION
[Soalan]
You serve as an engineering consultant for a new phase in the heat transfer process of a power
plant project while collaborating with your company. Your responsibility involves assessing the
design proposal for the development of a steam condenser designed to condense steam, formed
in conjunction with air and other non-condensable gases, and subsequently removing them
continuously through pumps. As an engineer, you have adhered to design considerations and
assumptions. The/total absolute pressure/at the entry of the condenser is assumed to remain
constant and is equal to the sum of the partial pressure of air and the saturation pressure of
steam entering the condenser. This assumption persists throughout the condenser due to the
small velocity of the steam flow. The condenser's specifications include handling steam with a
dryness fraction of 0.95 and a temperature range of 37C to 63C at a rate of 5,000kghr. Given
an estimated air leakage of 5kghr, and the gas constant, R for air is considered as 0.287kJkgK.
Determine:
[Anda berkhidmat sebagai perunding kejuruteraan untuk fasa baharu dalam proses pemindahan haba projek loji
kuasa sambil bekerjasama dengan syarikat anda. Tanggungjawab anda melibatkan penilaian cadangan reka bentuk
untuk pembangunan pemeluwap stim yang direka untuk memekatkan stim, yang terbentuk bersama-sama dengan
udara dan gas tidak boleh kondensasi lain, dan seterusnya mengeluarkannya secara berterusan melalui pam.
Sebagai seorang jurutera, anda telah mematuhi pertimbangan dan andaian reka bentuk. Jumlah tekanan mutlak
pada kemasukan pemeluwap diandaikan kekal malar dan sama dengan jumlah tekanan separa udara dan tekanan
tepu stim yang memasuki pemeluwap. Andaian ini berterusan di seluruh pemeluwap disebabkan oleh halaju kecil
aliran wap. Spesifikasi kondenser termasuk pengendalian wap dengan pecahan kekeringan 0.95 dan julat suhu 37C
hingga 63C pada kadar 5,000kgjam. Diberi anggaran kebocoran udara 5kgjam, dan pemalar gas, R untuk udara
dianggap sebagai 0.287kJkgK. Tentukan:.]
(a). The water flow lost from the feed circuit in kghr.
[Aliran air yang hilang daripada litar suapan dalam kgjam]
(b). The air pump capacity in m3hr. and
[Kapasiti pam udara dalam 33jam, dan]
(c). The additional heat required to be supplied in the boiler in kghr. due to undercooling for
condensate temperatures of 36.16C,32.88C,30.62C, and 28.08C.
[Haba tambahan yang diperlukan untuk dibekalkan dalam dandang dalam kgjam. disebabkan oleh kurang
penyejukan untuk suhu kondensat 36.16C,32.88C,30.62C dan 28.08C.]
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