Has been described in previous articles, the hydrocarbon Refrigerant = Refrigerant of the future, that the use of refrigerant Chloro flouro carbon (CFCS) contributed 25 percent against global warming. If the use of refrigerant is not stopped soon, it will cause the temperature of the Earth’s atmosphere became increasingly high.
One of the solutions to cope with the refrigerant can cause global warming and depletion of the ozone layer is a hydrocarbon refrigerant. The hydrocarbon refrigerant is refrigerant that is currently much scrutinized because eco-friendly, non-toxic, cheaper, does not cause ozone depletion with the value of the ODP (Ozone Depletion Potential) of 0, and not causing global warming with the value of the GWP (Global Warming Potential) of less than 3 (Ching-Song Jwo, 2006). Cool isn’t it? But why it is still not widely used? Because of the hydrocarbon refrigerant is easy to explode and burn. Fuel oil we like gasoline, diesel, and so on are also included in hidrocarbon family. The hydrocarbon refrigerant is currently showing the best performance is a R436A (a mix of propane and isobutana with 56/44 mass ratio). R436A as much as 55 g equivalent to R134a (Tetra Fluoro Ethane) as much as 105 g so the efficiency of the refrigerant charge storage of 48% (Cintaku, 2012).
We have been researching the use of the nanorefrigerant hydrocarbons which applicated on the refrigerator. Selected refrigerator refrigerator cooling machine is because the most widely used in the community, as we sincerely hope our research can benefit the entire community. It is called nanorefrigerant because the refrigerant mix with nanomaterial (which in our research is the nanoparticle TiO2). The following tools and materials that we use in our peneltian (everything we buy offline, bought in one of the cooling machine part sparte store in Surabaya)
As for the flow of creation of nanorefrigerant is as follows:
There are 2 ways to blend the TiO2 nanoparticles with refrigerant, the first way is by mixing directly with TiO2 refrigerant: with a special tool (ultrasonic oscillator). A special tool is not present in Indonesia, so we can’t wear this way. While the second way is to mencapurkan nanoparticle TiO2 with lubricant/oil compressors. Refrigerant while operating the refrigerator will pass through the compressor, so that the process is happening inside the compressor is oil mixed with TiO2 nanoparticles compressor.
Nanoparticles can enhance the performance of refrigerant due to the nanoparticles dispersed/mixed in lubricant reduces friction coefficient against refrigerant pipe surface capillaries and reduce the rate of usage so that it can improve the efficiency of and the reliability of the compressor. Originally we wanted to use a hydrocarbon refrigerant has the best performance i.e. R436A, but we encountered obstacles because the refrigerant is not sold on the market of Indonesia. We have searched the R436A throughout the entire cooling machines spare parts store of Surabaya, as well as the entire online store refrigerant in Indonesia, but the results are nil. Even we have been contacting the PT. Pertamina to enquire the availability of R436A, but pertamina also has yet to ever wear the refrigerant.
Alibaba.com (one of the largest online stores in China) sells R436A, but a minimum number of bookings is 200 tubes. Whereas 1 tube price is 5 dollars, so if we want to get the refrigerant must be issued a 1,000-dollar, if $1 is 12,000 dollars, then the total money that we spend on can reach 12 million rupiah. When our research is just got funding amounting to 10 million dollars. So the desire to examine the refrigerant that has the best performance cannot be fulfilled.
As solutions to these problems, we change R436A to R600A (equally hydrocarbon refrigerant). R600A is available in the market are Indonesia, but the refrigerator refrigerant applications have been examined by the researchers in the journal Chinese Performance of domestic refrigerator using nano-TiO2-R600a refrigerant USA working fluid. So we do more research as to validate the research conducted by the researcher.
We have done research that examines the influence of addition of TiO2 nanoparticles against the performance of refrigerant. Obtained that the greater the concentration of TiO2 which are mixed with the oil of the compressor of refrigerator performance then becomes progressively increased. It should be noted however that correct is at concentrations exceeding 0.5 g/L TiO2, TiO2 compressor and oil mixture have started is not homogeneous, TiO2 is insoluble in oil compressor. So it is feared will happen in capillary pipe deposition in TiO2 system refrigerator with above 0.5 g/L operated in a long time, but it is beyond the reach of our research. Here is the configuration of equipment from our research.
The installation of a pressure gauge and a digital thermometer based on standard measurements of performance fridge GB/T 8059.1-3-1995 China refrigeration and air-conditioning standard published in 2002. We want to wear the Indonesia national standard (SNI) but we still have not found a standard testing of refrigerators.
We are very careful in doing peneltian, considering the life is at stake due to the nature of the hydrocarbons that is very explosive. So in the research that has been done, all done in isolated rooms free from fire at all. Because the praise not happen something undesirable to research completed, our new hypothesis is the TiO2 can serve as a flame retardant (deduction yield), but it remains to be examined again.
As for our big plan against the use of hydrocarbon nanorefrigerant is as follows
Do you want to take part?
- Abdur Rozaq, Nur Abdillah Siddiq, Rendy Krisnanta Sons, Dicky Muhammad Yusuf Z., Siti Muyasaroh, Dr. Ir. Ali Musyafa M.Sc. 2014. Studi Eksperimental Nanorefrigeran TiO2-R600a Sebagai Refrigeran Masa Depan. Pekan Ilmiah Mahasiswa Nasional (PIMNAS) 2014 Semarang
- Shengsan Bi, Kai Guo, Zhigang Liu, Jiangtao Wu. 2011. Performance of a domestic refrigerator using TiO2-R600a nano-refrigerant as working fluid. Energy Conversion and Management 52 (2011) hal 733–737
- Ching Song Jwo. 2009. Efficiency analysis of home refrigerators by replacing hydrocarbon refrigerants, vol. 42, hal 697–701.
- Rasti, M., Aghamiri, S., dkk. 2013. Energy efficiency enhancement of a domestic refrigerator using R436A and R600a as alternative refrigerants to R134a, vol. 74, hal 86-94.