VECTOR DIAGRAM FOR THERMAL ECONOMICS OF ENERGY CONSERVATION BUILDINGS

摘要

The vector diagram for thermal economics has-been developed to analyze energy saving methods in the planning of energy conservation buildings. In the diagram, the differential of initial cost is shown in the abscissa, and that of running cost in the ordinate. Using this, energy saving methods both in architectural design and building mechanical and electrical systems are dealt with in an integrated way. The gradient of the vector is used as a criterion of energy efficiency and cost effectiveness, and any answer suitable to different philosophy of building clients can be easily obtained using this graph. A computer program to calculate both the initial cost and the running cost for this diagram was developed, and a program for economical comparison of heat source systems in office buildings was also developed specially for the application in the north of central Japan, and they have been used for the actual projects.