Effektivare elanvändning på avfallskraftvärmeverk : Förslag till handlingsplan för minskad elanvändning på Renovas anläggning i Göteborg

Sammanfattning: This thesis has identified and studied measures to allow for reduced use of electricity in a waste incineration plant in western Sweden. The energy extracted from the waste at the powerplant is utilized and sold in form of electricity and heat. Technical and environmentally the combined heat and power plant is by today's standards among the leading waste incineration plants in the world. The owners are constantly striving to improve the efficiency of the waste incineration plant. They have seen the opportunities for savings in reducing internal usage of electricity. The delivery from the plant in 2012 was ~1.3 TWh heat and ~0.2 TWh of electricity. Of the total generated amount of electricity, about 29% was used for internal needs, a quota referred to decline by means of this thesis. In the search for ways to achieve a reduction in electricity usage, the plants energy systems was separated into subsystems such as: electric power, heating, ventilation, compressed air, fluid systems, lighting, and two additional categories, administrative and other measures. Efficiency measures were identified through literature reviews, visits at the facility, study of process data and routines as well as interviews and discussions. After analyzes using data and estimated values these measures was quantified in both estimated reduction in electricity usage and in economic measures which resulted in a compilation of several substantial efficiency improvements. With the implementation of these, the electricity usage can be reduced by 4.7 GWh per year, which represents 5.9% of the internal electricity usage. Repayment periods range between zero and 5.3 years. Based on the substantial efficiency potentials, administrative potentials emerged that may contribute to a future energy-wise management of the waste incineration plant.