Audit energi pada produksi teh hitam ortodoks di PTPN IX (Persero) Kebun Jolotigo, Pekalongan

Abstract

Energy audit is the activity to identify potential energy savings with energy conservation in a system, facilities and equipment that already exist. The process of tea production in Jolotigo includes seedling, planting, cultivating, picking and carrying, withering, rolling, fermenting, drying and dry sorting. The aim of this study is to conduct energy audit on the black tea production process in PT. Perkebunan Nusantara IX (Persero) Jolotigo, Pekalongan. The results of the study are to gift the information about the energy flow at every state of the production process and the energy type that required producing per unit of product as well as withering and drying system efficiency. Energy resources used in the process of tea production are energy of fertilizers, pesticides, human, electricity, fuel oil and biomass from solid fuel wood of tea. Energy consumption to produce one kilogram of dry tea is 57.32304 MJ. The energy consumption in the production of black tea are 6.5% of human labor, 1.4% of electricity, 6.06% of fuel oil, 72% of solid fuel, 12.5% of fertilizer energy , and 1.5 % derived from pesticides. The largest energy of production stage that require is the withering which is 26.73682 MJ / kg dry tea (46% of total energy consumption), while the smallest stage energy is the packaging which is 0.013922 MJ / kg dry tea (24% of total energy consumption). Wood solid fuels that dominate energy consumption of the process used for solid fuel are withered and dried. Withering has 5.41% system efficiency, and drying has 24%. Energy saving can be done in wood fuels consumption, intensive investigation on the heat exchanger, flue, as well as factory equipment.