Image of Development of Primary and Secondary Refrigerant for Energy Efficiency Enhancement in Air Conditioning Chiller System : Presentasi Seminar RUTI


Development of Primary and Secondary Refrigerant for Energy Efficiency Enhancement in Air Conditioning Chiller System : Presentasi Seminar RUTI

Aryadi Suwono, Ari Darmawan Pasek,
Nathanael P.Tandian, Willy Adriansyah and Yuly Indartono

Hiromoto Usui, Hiroshi Suzuki, Yosio Komoda
Department of Chemical Engineering, Kobe University, KOBE, JAPAN


Based on the previous research results on HC refrigerant and on the potential and multi benefits, the Indonesian research team and a team the Japanese from the Department of Chemical Science and Technology, Kobe University (KU) agree to collaborate and make use their knowledge accumulation to solve the problem on the efficiency enhancement of the AC chillers through collaborative research and development (R&D).

This proposed R&D will basically focus on the problem of minimizing energy use in the AC system of chiller type, through the performance (COP) enhancement of the refrigeration sub-system and improvement of ‘chilled water’ (secondary refrigerant) characteristics. For both team, this R&D will indeed be the continuation of the previous or on going research but with more broaden and integrated goals but with a more focus target. The goal is to achieve a significant energy saving in the AC system. with the target for final target within three years proposed research activity is its application of research results in a large AC system of chiller type as the demonstration plant.

During the first year, the research has been focused on the characterization of R22 refrigerant substitute which from thermodynamic properties as well from the flammability level was carried-out successfully with the preliminary results were encouraging (the same saturation pressure and LEL > 3.5 %) with the theoretical COP better than COP for R22, however this still need to be tested intensively.

On the other hand, the research results of our Japanese partner on the characterization of secondary refrigerant by adding proposed additive to the water and tested for straight smooth pipe were also very encouraging.

During the second year, proposed the primary refrigerant resulting from the first year stage was tested in the small refrigeration system. A series of the performance test on an already available refrigeration test bench utilizing the developed primary refrigeration has been carried out intensively. The results of this test are very promising a significant improvement on the COP up to 15 - 20 % was obtained although less HC refrigerant its characteristic which is less flammable make this developed refrigerant more promising for wider range of applications.

In this stage of joint research, during the first period the partner team was exploit further the use of ‘specific heat capacity’ enhancement additive and carry out its characterization and performance test.

During the second year, the integrated performance test on a medium of 10 kW cooling capacity AC system of chiller type utilizing both primary and secondary refrigerant was carried out by the Indonesian team. The test results was very favorable although the best results was obtained on the used of R290 and water+hydrate.

In the third year, based on the results obtained during the first and second year, both teams (ITB and Kobe University) will carry out a retrofit design on an existing AC system of sufficiently large scale to implement the utilization of developed refrigerants and implement the design result as a demonstration plant. The Indonesian team will continuously monitor and perform evaluation of the system reliability and performance. For this study on field implementation, the provided research budget will not be sufficient, but with the involvement of one Indonesian company who is already familiar with this retrofitting the AC systems that constraint can hopefully be solved.

Entry oleh ahmad


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Penerbit Lembaga Ilmu Pengetahuan Indonesia. : Jakarta..,
Deskripsi Fisik
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