Abstract
The paper analyzes the optimum cogeneration system (CGS) for the reduction of greenhouse gases. The paper compares the CGS characteristics for building types, system structure, power grid connection and operation patterns. The result shows that houses have the greatest potential to reduce greenhouse gases among variety types of buildings and power grid connection of houses is essential for the reduction. To realize the system the authors propose a concept of cooperative cogeneration network system, which equips heat storage and operates flexibly to flatten energy demand in the grid.
