Loading...
2 results
Search Results
Now showing 1 - 2 of 2
- Energy management system ISO 50001:2011 and energy management for sustainable developmentPublication . Gonçalves, Vítor António da Silva; Santos, Feliz José Mil Homens dosStarting from sustainable development, energy efficiency and energy management fundamentals, a detailed analysis of the energy management systems standard ISO 50001:2011 was carried out from the viewpoint of sustainable development. The purpose of the analysis was to assess the effectiveness of its implementation, to identify the existence of gaps and to develop improvements capable of fulfilling the identified gaps. The effectiveness and the results of ISO 50001:2011 implementation, combined with the construction of an ideal energy management system allowed the identification of four gaps. The contribution to sustainable development of these gaps was determined. A detailed framework analysis of the four identified gaps followed, reviewing the associated ISO 50001:2011 standard requirements and converting them into six potential improvements. These were then proposed to 146 experts in energy management systems via an on line survey. Experts were divided into three groups, dependent upon their specific areas of expertise, in order to obtain legitimate opinion and validation. The results of this survey, with a global 64.4% positive concordance, showed clear evidence that the six selected improvement proposals, could contribute positively to the evolution of ISO 50001 towards energy management for sustainable development.
- Impact of the new electricity remuneration scheme on the waste-to-energy recovery activity in PortugalPublication . Silva, Mário; Lagarto, João; Sousa, Jorge A. M.; Santos, Feliz; Viveiros, Carla; Barata, FilipeThe remuneration scheme for the electricity produced by Waste-to-Energy (WtE) recovery plants has changed recently in Portugal according to 2020 legislation. The new model, linking the electricity remuneration from WtE plants to the spot electricity prices, is expected to bring greater uncertainty in the waste activity, which is a novelty for the sector. In Portugal, Valorsul is the municipal waste treatment entity responsible for the recovery and treatment of municipal solid waste (MSW) produced in 19 municipalities in the Lisbon area. This paper highlights the impact of the new Portuguese electricity remuneration scheme for electricity from waste on Valorsul’s WtE plant. For this purpose, the new remuneration scheme is modeled and simulated based on electricity spot market price scenarios, which are compared with the base case scenario of the former remuneration scheme. Considering different electricity prices for the electricity produced by the WtE plant, the present study anticipates the consequences of the gate-fee of such regulatory changes. Results show that any price changes in the electricity remuneration scheme are offset by equivalent changes in the waste gate-fee. Consequently, the change in the remuneration of the electricity from the WtE plant is, in fact, neutral for the Valorsul accounts and lower revenues from the electricity generation activity of the WtE will negatively impact the gate-fee prices paid by the waste users.