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You serve as an engineering consultant for a new phase in the heat transfer process of a power plant project while collaborating with your
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 5,000 kg/hr. Given an estimated air leakage of 5 kg/hr, and the gas constant, R for air is considered as 0.287 kJ/kgK. 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. Sebagal 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. Andalan 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 5,000 kg/jam. Diberi anggaran kebocoran udara 5 kg/jam, dan pemalar gas, R untuk udara dianggap sebagai 0.287 kJ/kgK. Tentukan:.] (a). The water flow lost from the feed circuit in kg/hr. [Aliran air yang hilang daripada litar suapan dalam kg/jam) (b). The air pump capacity in m3/hr. and [Kapasiti pam udara dalam m3/jam, dan] (c). The additional heat required to be supplied in the boiler in kg/hr. 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 kg/jam.disebabkan oleh kurang penyejukan untuk suhu kondensat 36.16C, 32.88C, 30.62C dan 28.08C.]
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