Technology Reports of Kansai University (ISSN: 04532198) is a monthly peer-reviewed and open-access international Journal. It was first built in 1959 and officially in 1975 till now by kansai university, japan. The journal covers all sort of engineering topic, mathematics and physics. Technology Reports of Kansai University (TRKU) was closed access journal until 2017. After that TRKU became open access journal. TRKU is a scopus indexed journal and directly run by faculty of engineering, kansai university.
Technology Reports of Kansai University (ISSN: 04532198) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are
in the following fields but not limited to:
This paper presents a novel non-invasive monitoring method, based on a Liénard-type model (LTM) to diagnose single and sequential leaks in liquid pipelines. The LTM describes the fluid behavior in a pipeline and is given only in terms of the flow rate. Our method was conceived to be applied in pipelines mono-instrumented with flowmeters or in conjunction with pressure sensors that are temporarily unavailable. The approach conception starts with the discretization of the LTM spatial domain into a prescribed number of sections. Such discretization is performed to obtain a lumped model capable of providing a solution (an internal flow rate) for every section. From this lumped model, a set of algebraic equations (known as residuals) are deduced as the difference between the internal discrete flows and the nominal flow (the mean of the flow rate calculated before the leak). Once the residuals are calculated a principal component analysis (PCA) is carried out to detect a leak occurrence. In the presence of a leak, the residual closest to zero will indicate the section where a leak is occurring. Some simulation-based tests in PipelineStudio® and experimental tests in a lab-pipeline illustrating the suitability of our method are shown at the end of this article
The purpose of this research is to determine the performance of mini cold storage with three rotational variation of diesel engine which are 650 RPM, 700 RPM and 750 RPM, temperature of mini cold storage room reached -20 ºC, initial product temperature 28ºC, the final temperature of the product is -5 ºC, the evaporator temperature is -29 ºC and the condenser temperature is 32 ºC to 34º C. The results shows that in the 650 RPM, the fuel consumption is 13,200 milliliters with a total operating time of 22 hours, for refrigeration capacity of 1,304 kW, refrigerant mass flow rate of 0,0085 kg/s, compressor capacity of 0,35 kW, condenser capacity of 1,65 kW with COP value of 3,75. Whereas in the 700 RPM of diesel engine the total fuel consumption is 10,400 milliliters with a total operating time of 16 hours, for refrigeration capacity of 1,74 kW, the mass flow rate of refrigerant is 0,011 kg/s, compressor capacity is 0,45 kW, condenser capacity of 2.19 kW with COP value of 3,85. Furthermore, in the 750 RPM of diesel engine, the total fuel consumption is 13,300 milliliters with a total operating time of 19 hours, for refrigeration capacity of 1,483 kW, the mass flow rate of refrigerants is 0,00980172 kg/s, compressor capacity is 0,405007 kW, condenser capacity is 1.89 kW with COP value of 3,6. it was concluded that the use of a 700 RPM diesel motor produces the highest COP value (3.85) with efficient and effective fuel consumption (10,400 milliliter)