O‘ng tomoni noma’lum bo‘lgan ikkinchi tartibli chiziqli oddiy differensial tenglama uchun nolokal shartli masalalar

Аннотация

This article provides a calculation of the optimal sizes of sun-protection devices that help reduce heat loss in winter and eliminate overheating in summer on the facades of civil buildings. Key words: stationary sun-protection devices, insolation, design hour, thermal transmittance coefficient of sun-protection devices, degree of shading, blinds with horizontal slats In the modern world, much attention is paid to increasing the energy efficiency of buildings and structures. In most cases, increasing the energy efficiency of construction projects is achieved by reducing heat losses during cold and hot periods. Modern requirements for insolation of premises of residential and public buildings are established by sanitary standards [1]. Calculations of insolation duration are a mandatory section of pre-project and design documentation. Standards establish a minimum duration of insolation, but excess direct solar radiation can also lead to negative consequences. The practice of building buildings in the southern regions shows that many buildings are designed without taking into account the excessive thermal effect of insolation in the summer. In buildings with unlimited access to insolation in the premises, technical means of sun protection (air conditioning, internal cooling systems) are used, which leads to significant energy costs. To improve the energy efficiency of a building and limit excess solar radiation entering the premises through light openings, a variety of solar shading devices should be used. 87