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Pengaruh Perubahan Putaran Fan Precooling Condenser terhadap Temperatur Supply pada Sistem Dehumidifikasi Mekanik

The Influence of Precooling Condenser Fan Rotation to Supply Temperature on Mechanical Dehumidification System

Tugas Akhir, 026 / 2018 / RTU
Undergraduate Theses from JBPTPPOLBAN / 2019-01-21 14:09:19
By : Tito Riyanto - 151611030 (titoriyanto20@gmail.com)
Created : 2019-01-21, with 4 files

Keyword : Reheating Primary Condenser, Variasi Putaran Fan, Temperatur Udara Kering (TDB), dan Relative Humidity (RH)
Subject : Reheating Primary Condenser, Rotation Fan Variation, Temperature Dry Bulb (TDB), and Relative Humidity (RH)

Kenyamanan termal suatu ruangan ditentukan oleh beberapa kriteria seperti temperatur, kelembaban, dan kecepatan aliran udara. Kondisi yang tidak sesuai dengan kriteria seperti kelembaban yang terlalu rendah atau tinggi dapat menyebabkan gangguan kesehatan. Pada kondisi ruangan normal dan RH 30-60% mikroorganisme dan organisme biologi (jamur/lumut) tumbuh secara lambat. Terdapat delapan proses pengendalian tata udara salah satunya adalah dehumidifikasi. Pengurangan kadar uap air (dehumidification) di udara salah satunya dilakukan dengan cara dehumidifikasi mekanik. Kapasitas pembuangan kalor pada sistem tersebut terlalu besar yang berakibat pada nilai temperatur udara kering (TDB) supply air lebih besar dari pada temperatur udara kering (TDB) entering air. Diperlukan alternatif untuk membuang sebagian kalor ke lingkungan pada kondenser melalui precooling condenser. Dengan memvariasikan putaran fan precooling condensor diperoleh nilai temperatur udara kering (TDB) supply air mendekati sama dari entering air dengan pengurangan kadar uap air di udara. Kondisi temperatur udara kering (TDB) ruangan 27,1⁰C, 73% RH, temperatur udara kering (TDB) hasil proses reheating primary condenser dengan 100% putaran fan precooling condenser bernilai 27,9⁰C, 39,53 % RH dan laju energi panas reheating primary condenser menjadi 796 Watt dari 1.211 Watt. Efektifitas pembuangan kalor reheating primary condenser terhadap sistem mencapai 65,73%, kapasitas penyerapan panas sensibel dan laten oleh supply air masing-masing meningkat 2,53 dan 2,49 kali lebih besar dari udara yang tidak dikondisikan. Supply air dapat digunakan untuk mengeringkan produk atau menangani beban laten ruangan yang tinggi. Kata Kunci: Reheating Primary Condenser, Variasi Putaran Fan, Temperatur Udara Kering (TDB), dan Relative Humidity (RH).

Description Alternative :

The thermal comfort of a room is determined by several criteria such as temperature, humidity, and airflow velocity. Unsuitable conditions of criteria such as low or high humidity can cause a health problems. In normal room conditions and 30-60% RH microorganisms and biological organisms (mushroom/moss) grow slowly. There are eight processes of air conditioning control, one of them is dehumidification. Reduction of moisture content (dehumidification) in the air for instance is done by mechanical dehumidification. The heat disposal capacity of the system is too large that cause a dry bulb temperature (TDB) of supply air is higher than a dry bulb temperature (TDB) of entering air. An alternative is required to remove some of heat to environment in the condenser through of precooling condenser. With varying the rotation of the precooling condenser fan, the value of dry bulb temperature (TDB) of supply air is closer to entering air with reduction of moisture content in the air. The Condition of dry bulb temperature (TDB) of the room is 27,1⁰C, 73% RH, the result of dry bulb temperature (TDB) with reheating process of primary condenser with 100% rotation of fan precooling condenser is 27,9⁰C, 39,53% RH and heat energy rate with reheating primary condenser become 796 Watt from 1.211 Watt. The effectiveness of heat disposal of reheating primary condenser to system reaches 65,77%. The sensible and latent heat absorption capacity by the supply air increases 2,53 and 2,49 times greater than unconditioned air. Supply air can be used to dry the product or handle the high latent load of the room. Keywords: Reheating Primary Condenser, Rotation Fan Variation, Temperature Dry Bulb (TDB), and Relative Humidity (RH).

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  • Pembimbing 1: Drs. Faldian, M.Eng.

    Pembimbing 2: Susilawati, S.T., M.Eng., Editor: Erlin Arvelina

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