English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

⎯ this research modified the coolbox by mixing sengon wood sawdust and potassium hydroxide-soaked cocofiber. By considering its composition, potassium hydroxide content, and soaking duration, this research was done to find the optimum amount of those three variables to make the best insulator. The best insulator was chosen based on its thermal conductivity, density, and economic value, and the easiness in the making. From the experiment, the chosen composition consists of 30% sengon wood sawdust and 70% potassium hydroxide-soaked coco fiber with the content of 15% and soaking duration of 2 hours. With a thermal conductivity of 0,352W/mK, a density of 0,303gram/cm, and specimen production cost of Rp607,41, this material was used for composition reference in the making of the coolbox. The experiment of the coolbox lasted for 35 hours, with 71 temperature data retrievals. The coolbox experiment used 500-gram tuna fish and 2500 gram ice as cooler. The result showed that the lowest temperature for ice inside the coolbox was 0,3°C, the lowest temperature of fish was 5°C, and the lowest temperature in the coolbox chamber is 17°C. With the ratio of 1:5 for fish and ice, the coolbox insulation using sengon wood sawdust and potassium hydroxide-soaked coco fiber was able to maintain the fish temperature below 20°C for 27,5 hours. Meanwhile, the styrofoam coolbox was able to maintain fish with the same condition for 35 hours. Keywords⎯ coolbox, coconut coir, potassium hydroxide, sengon wood, thermal conductivity.

Coolbox Design Modification for Traditional Fishing Vessel Using Sengon Wood Sawdust and Potassium Hydroxide-Soaked Coconut Coir