No abstract

Heat exchanger (HE) is a component of the main engine cooling system that plays a very important role in the process of changing the fluid temperature by exchanging the amount of heat with other fluids. The use of HE in the main engine cooling system should be considered in controlling after operation. HE performance can be analyzed using heat transfer analysis in the form of heat absorbed by HE (Q), LMTD and heat transfer coefficient (U). This study aims to analyze heat transfer in the form of calculations of absorbed heat, LMTD and heat transfer coefficient on the main engine HE KM Sumber Mutiara. This study measures the temperatures of fresh water and sea water entering and leaving the HE. In addition, measurement of water discharge and determination of the dimensions of the HE used for the main engine cooling system of KM Sumber Mutiara. This research shows that the highest heat value absorbed by HE (Q) is at RPM 1200 at 44.85 kJ/s, for the LMTD value at RPM 1000 at 45.69 oC and for the U value at RPM 1100 at 824 W/m2. oC. HE main engine KM Sumber Mutiara has not maximized its performance due to the fouling factor from sea water. The need for preventive maintenance and additional filters on the KM Sumber Mutiara Main Machine Heat Exchanger to increase the effectiveness of the HE.

Bagian timur Provinsi Riau tepatnya di daerah kota Dumai memiliki tipologi bagian pantai dengan garis yang cukup Panjang. sebagian besar penduduknya melakukan pekerjaan dengan memanfaatkan sumber daya perikanan laut di sepanjang 134KM garis pantainya. Pemanfaatan sumber daya perikanan laut ini berhasil

Fisheries products from marine sector really need to be considered because Indonesia, especially in the waters of Dumai City, has abundant fish resources of up to 571 tons/year. Diversification of processed fish is a solution so that processed fish can be consumed by the community. On the other hand, the local community of Pelintung Village, Dumai City, still lacks appropriate technology that can improve the quality of processed products from diversification. Some processed fish products are of poor quality. Community service activities aim to provide knowledge transfer and use of oil draining machines so that people can improve the quality of processed fish or non-fish. This community service activity uses the method of applying the use of an oil draining machine in Pelintung Village. The essence of this event is the delivery of theoretical and practical material about oil draining machines. The pre-test was carried out before the material was delivered and the post-test was carried out after the material was delivered. Filling in the satisfaction index is done along with filling out the post-test. The results of this activity stated that the community was very enthusiastic as the percentage of correct answers for the pre-test and post-test increased. The results of the pre-test and post-test in the knowledge, operation and maintenance categories increased to 75%, 84% and 100%, respectively. The satisfaction level of participants was also stated to be satisfied with the percentage of 61.7% and getting benefits from this community service activity. This activity must continue to be evaluated so that when holding similar activities, it can be more effective, efficient and sustainable. Recommendations for service activities in the form of processing fishery products that can be practiced directly with the community will be better in the future.

Handline is a fishing gear that is selective about the catch and is a fishing gear that is passive or in the process of catching it there is a waiting period. The waiting period for the handline is the time when the bait is waiting for the fish to eat it. The depth of the hook on KM Viona III varies. The depth is divided into 2 groups between 45-60 m and 67.5-82.5 m. The purpose of this study was to determine whether or not there was an effect of differences in hook depth on catches by paired sample test t-test using SPSS 24. Based on the Wilcoxon test, non-parametric test hook depth test for total catches presented by SPSS 24 with asymp values .sig of 0.041. Because 0.041 < 0.05 means that there is a difference in catches based on the number of fish and it can be concluded that there is also an effect of hook depth on the number of catches, and the weight of the catch has a value of 0.023. Because the value is 0.023 <0.05, H0 is rejected and Ha is accepted, which means that there are differences in the weight of the catch at different depths and it can be concluded that there is also an effect of the depth of the hook on the weight of the catch. which was carried out at the Cilacap Ocean Fishing Port and participated in a 32-day arrest operation at KM Viona III.