Energy optimization in the design of the facades of buildings with an emphasis on value engineering approach (Case Study: Omid commercial-residential complex in Mashhad)

The costs of a project is included the design and implementation and the costs of ownership, (operation, maintenance and expenditures) throughout the project’s life cycle. One of the building’s Operational period costs is the cost of energy that the energy consumption analysis during the design phase can lead to major savings in the project’s life cycle.The rapidly growing world energy use has already raised concerns over supply difficulties, exhaustion of energy resources and heavy environmental impacts (ozone layer depletion, global warming, climate, etc.). The global contribution from buildings towards energy consumption, both residential and commercial, has steadily increased reaching figures between 20% and 40% in developed countries, and has exceeded the other major sectors: industrial and transportation. Growth in population, increasing demand for building services and comfort levels, together with the rise in time spent inside buildings, assure the upward trend in energy demand will continue in the future. For this reason, energy efficiency in buildings is today a prime objective for energy policy at regional, national and international levels.In this research, Value engineering workshop, consisting of specialized working Group of Project Management, Architecture and Civil Engineering was formed to study energy efficiency in building’s facade (Case Study: Omid commercial-residential complex in Mashhad) and the proposed options were assessed in the design phase and after the consensus of expert opinions, by using the brainstorming method, improving ideas were replaced. Finally, evaluation of options and the calculation of difference between them were presented. This research is a descriptive and practical study. The data collection tool was a literature review and case study. The study aims to assess the studies of value engineering to increase the quality and reduce the cost of architectural designs and delivering a sample of proposed solutions in order to use value engineering services in these designs. So far, the value engineering is the most practical in the fields of industrial, agriculture, transport and services design in the world. This study aimed to express the results of value engineering as applied to architecture projects, in order to reduce the costs and energy consumption in façade design by using the Energy Plus software and it shows the practicability and usefulness of the value engineering in architectural projects. Findings shows that studies of value engineering in architectural projects have the following

improving the level of staff’s knowledge, unfolding the weaknesses of the primary design, Achieving new solutions, Encourage to participation and work in groups, Simplification of the design, making needs and goals of the project clear, Coordinating the various proceedings and reduce the costs.