Investigations of mathematical models in solar collectors

There has been prepared the calculations methods of heat productivity of sun collectors which enables to determine the expedient of maintenance of polymers in sun collectors in the temperature mode given for different region and climate conditions. Show that, thermo endurance - T0 maybe using as characteristic of thermo endurance of optic materials. If heating flow, destruction temperature and internal surface temperature is measured during test, it is possible to determine value T0 and other necessity characteristics. As a result of the taking test was lead to comparison evaluation of considered materials. Working range of heating flow and up level heating embark have been determined

The Origin of the "Chorbog" Style Gardens and Their Social Significance

The charbag planning style has been and is widely used in the past and present in the Islamic Eastern countries in suburban recreational parks and camps and in the courtyards of buildings inside the city, in the courtyards of residential buildings. The article discusses the planning style of recreational parks "Chorbog", its history and significance