Economy-evaluation model for a resource circulation system of polystyrene foam from marine debris

発泡スチロール系漂着ゴミの資源循環システムのための経済性評価基礎モデル

Economy-evaluation model for a resource circulation system of polystyrene foam from marine debris

Creators Ishida Takeshi

Creators Ishida Masateru

Creators Tsuda Minoru

Creators Ikoma Nobuyasu

This study developed a basic model to evaluate the economic efficiency of fuel recycle of polystyrene foam from marine debris. This model was developed using spreadsheets and the optimization calculation tool in Microsoft Excel. In this model, a resource - energy circulation system comprising three units was assumed: (i) a polystyrene foam liquefaction system, (ii) an industrial cogeneration system (CGS) of small scale factory, and (iii) a photovoltaic (PV) power generation of residential house. The developed model deduces the most economically efficient plan involving energy exchange between an industrial CGS plant and residential PV systems. The optimization results show the possibility of additional economic benefit of PV while keeping investment payback period of CGS and PV within a certain range. The economic benefit from implementing this energy exchange can also be reinvested to produce recycled oil from polystyrene foam or to collect coastal marine waste. The developed model showed the possibility of an economically viable recycle system of polystyrene foam from marine debris.

[ISSN]0370-9361