The performance of a solar collector on adsorption refrigerator

Nasution

et al. 2019

dinamis

Dalam dunia industri teknologi, penggunaan prototype yang dibuat akan memakan waktu yang lama dan biaya yang besar dalam pengoperasian kinerja sistem, analisa perlakuan terhadap sistem, dan memberikan keputusan dari hasil analisa. Oleh sebab itu, dilakukan pencarian teknologi alternatif dari prototype yang menunjang dunia industri meningkatkan kinerja sistem dengan menyediakan cara untuk membuat rancangan dan keputusan rancangan, serta manajemen yang lebih baik. Ditemukan salah satu teknologi alternatif yaitu aplikasi CFD. Aplikasi CFD banyak digunakan dalam bidang ilmu, diantaranya dalam hal proses evaporasi-kondensasi. Tujuan dilakukannya penelitian ini adalah untuk mengetahui fenomena fluida yang terjadi didalam sistem evaporator pada penggunaan alat pendingin adsorpsi. Simulasi dilakukan pada kondisi transien, dilakukan pada waktu 18:00 WIB saat proses adsorpsi terjadi. Evaporator menggunakan bahan Aluminium ketebalan 3 mm dan menggunakan fluida metanol sebagai refrijeran nya. Hasil simulasi ditampilkan dalam bentuk kontur, gambar dan video. Berdasarkan perhitungan empiris, besar efisiensi evaporator yang terjadi adalah sebesar 78,4%.

Section: Pendahuluanunclassified

Simulasi Performansi Evaporator Sistem Mesin Pendingin Siklus Adsorpsi Menggunakan Perangkat Lunak Ansys 17.0

Arif

Nasution

et al. 2019

dinamis

Design of a Parabolic Collector for Solar Adsorption Refrigerator

Hutasoit

IOP Conf. Ser.: Mater. Sci. Eng.

Siahaan

et al. 2020

This study aims to design a parabolic type collector used in solar adsorption refrigerator. The solar collector is a device designed to collect heat by absorbing sunlight, which is then utilized as useful thermal energy, one of which is in the adsorption cycle refrigerator. The material used for solar collector is aluminum. In the design of a parabolic type, solar collectors must pay attention to the design of the collector design, how the solar collector works, and the materials and materials used to improve the collector’s performance. The influence of the heat intensity of solar radiation and the collector insulation box is very influential on the collector’s performance. From the results of the design of this tool, it can be seen that the type of parabolic collectors lifts the heat of solar radiation more focused and more efficiently. Overall, a parabolic type collector design with a cross-sectional area of 0.5 m2 results in a thermal collector efficiency of 64.60%.

Design of the box type evaporator in the solar adsorption refrigerator

Sinurat

IOP Conf. Ser.: Mater. Sci. Eng.

Hutasoit

et al. 2020

The evaporator is a device used to separate two phases between liquid-gas and liquid-liquid by using heating media. The model uses aluminum material with dimensions 170 mm x 170 mm x 240 mm and uses 3 mm aluminum thickness and three pieces of aluminum pipe with dimensions of 100 mm. The choice of material used it aims to obtain optimal results from the work of the evaporator. The effect of temperature is significant in the process that occurs in the evaporator will determine the effectiveness of the evaporator so that it can separate the water content in methanol. By heating, until one component evaporates on its boiling route, it can separate it from other parts by using methanol with 90% purity. The results of the design that is made produce an evaporator with a volume of 5 liters. The minimum evaporator temperature obtained during testing occurs in the second cycle of 0.5°C. Several factors affect the performance of an evaporator. The total heat needed in the process of reducing the maximum water temperature to the minimum water temperature and the latent heat required by methanol to evaporate.