News Academy of Engineering Sciences A.M. Prokhorov Annotation << Back E conomic expediency of application of «green» engineering technologies in the field of ventilation and air-conditioning V.N. Nikiforov G.I.Sheveleva A.V.Nikiforov This article presents the experience of designing innovative systems engineering to project the 5-star Kempinski Hotel in Moscow. This reconstruction project was an example of adaptation of an old building under the art hotel with the latest engineering software. The achieving the highest comfort with maximum energy savings has proven difficultly. Possibility of providing newly constructed or reconstructed buildings downtown Moscow heat and power are limited. We have to find a more flexible, synergistic solutions at the intersection of engineering and architecture, as well as demonstrate the impact of the application of those investors or other technologies to the investment performance of the project. In this project are designed the ventilation system with efficient heat recovery from exhaust air, with the use of rotary heat exchangers. Significant energy savings provides the use of displacement ventilation, which is particularly effective in high altitude areas. In contrary to projects, wide spread in Russia and Europe, with circuits using fan coils as air coolers, applied ejection closers – chilled beams. Now it is not a trivial question of economic feasibility of investing in «green» projects. At first glance, these projects require higher capital costs, and return on investment in green technology is not always obvious. In addition, the task of designing environmentally friendly and energy efficient building requires a different approach than designing conventional buildings. We present calculations of the mathematical model to prove the cost-effectiveness of these solutions. Key words: engineering systems, energetic effectiveness, buildings. Contacts: Е-mail: nvn@lt.phys.msu.ru Pp. 48-51.