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N. P Tandian
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Mechanical Engineering

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RETROFIT AND CONVERSION OF R-22 CHILLER TO R-290 AND ITS PERFORMANCE COMPARISON Aryadi Suwono; N. P Tandian; A. D Pasek; T Hardianto; T. A Fauzi Soelaiman
Mesin Vol. 14 No. 1 (1999)
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The retrofit and conversion of a R22 chiller to R290 was done on an AC chiller Carrier Type 30-GB-070-910. The retrofit of chiller was mainly the implementation of safety features and conversion to HC refrigerant. A series of measurements to evaluate its performance has been carried out on the same chiller for both eases i.e. before and after conversion, while it was in use. The resulting data analysis revealed that the chiller performed better with HC refrigerant compare to its previous condition. Retrofitting procedure, refrigerant conversion, test procedure and data analyses are discussed in this paper.
Performance Testing of Indonesian Hydrocarbon Refrigerants N. P Tandian; A Suwono; A. D Pasek; T Hardianto; T. A Soelaiman; B. T Prasetyo; Sarwono Sarwono; Kafi'uddin Kafi'uddin
Mesin Vol. 14 No. 1 (1999)
Publisher : Mesin

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In conjunction with the CFC phase out, IURC-ES ITB has been concentrating its research of HC refrigerant on 'propane natural butane' (PNB) refrigerant. The test results obtained in IURC-ES ITB during the development of the PNB refrigerant showed that PNB has better performance than PIB and CFC-12. The field tests of PNB also showed the similar results. Recently, to reconfirm the previous test results, the performance of PNB, PIB and CFC-I2 were compared in a series of performance tests in the LTMP Serpong. The tests also show that PNB consistently has better performance compared to PIB and CFC-12. This paper also reports the current development of PNB refrigerant in IURC-ES ITB.
Indonesian Experiences in Retrofitting of Some Milk Cooler Systems Ari D. Pasek; N. P Tandian; A Suwono; T Hardianto; T. A Fauzi Soelaiman
Mesin Vol. 14 No. 2 (1999)
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To overcome the ozone layer depletion problem, the Indonesian government has ratified the Montreal protocol and its amendments. The import of R-12 refrigerant to Indonesia has been banned since the end of 1997. Meanwhile, most of Indonesian milk cooling units use R-12. Therefore, it is expected that these cooling units have to be switched to other refrigerant soon. Almost all of Indonesian milk cooling units belong to small or medium dairy cooperatives that cannot aflord to retrofit their systems to R-134a. In this research, a milk-cooling unit designed for R-12 was directly switched to propane/butane refrigerants (propane-isobutane, and propane/n-butane refrigerants) without any modification. The performances of the milk-cooling unit operated with propane/isobutane, propane/n-butane and R-12 gefiigerants were investigated. It was found that propane/n~bntane refligerant is the most eflicient, and followed by propane/isobutane and R-12. Results of several other milk cooling units were also reported.
Performance Comparison of CFC12, HCR12 and HCR12+LFS as Refrigerants Nila Damitri; C Soekardi; B. T Prasetyo; Sarwono Sarwono; Kafi'uddin Kafi'uddin; A Suwono; A. D Pasek; N. P Tandian
Mesin Vol. 14 No. 2 (1999)
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Additional concern about warming of the global environment through the greenhouse effect has necessitated selection of compounds with shorter atmospheric lifetimes and higher energy efficiencies as substitute refligerants for Heating, Air Conditioning, and refrigerating equipment.Several substitute compounds of the hidrocarbon were identified by similarities in normal boiling points and corresponding saturated vapor pressure characteristics. Sample quantities were obtained from ITB (Two sample corresponds with CFCIZ named Hycool HCRI2 and Hycool HCR12+LFS). Performance comparisons among these refrigerants are performed utilizing Air Conditioning System test facility in Laboratory for Thermodynamics, Engines and Propulsion System (LIMP "“ BPP Teknologi). The results show that these alternatives refrigerants exhibit better performance than CFC I 2 at the predetermined operating conditions.
Co-Authors A Suwono A. D Pasek Ari D. Pasek Aryadi Suwono B. T Prasetyo C Soekardi Kafi'uddin Kafi'uddin Nila Damitri Sarwono Sarwono T Hardianto T. A Fauzi Soelaiman T. A Soelaiman