Four$-$processers computer operates in the server in the weather station building in the mountains. The computer is cooled by two $3$ W fons at the outlet from the chassis. The thermal power of each processor is $80$ W $.$ The temperature and pressure in the server room are $25C$ and $66\mathrm{.}63$ kPa $,$ respectively. The temperature and air velocity at the outlets from the chassis sheuld not exceed $60C$ and $100\frac{m}{m}in($limin tation die to noise$).$ Calculate mass flow rate of the air and diameter of the fans. Neglect heat losses to the surroundingy from the computer and the knetic energy of cooling air at the inlet as well as assume no variation in the static pressure. The aut may be treated as on ideal. di$-$atemic gas with a gas constant of $287\frac{J}{kgK},$ and specific heats at constart volume and pressure of $717\mathrm{.}5$ and $1004\mathrm{.}5\frac{J}{k}\frac{g}{h},$ respectively. Its specific enthalpy is given by the formula; $h=u+pv=c_{p}T$