The temperature in a cold storage is desired to be $-8\backslash$deg C$.$ Under these conditions, the heat loss of the tank was calculated to be $1100$ Watts. A horizontally placed evaporator pipe of a cooling machine is used to cool the tank. The pipe is $100$x$2\mathrm{.}5$ mm and the external wall temperature is $-22\backslash$deg C$.$ Calculate the length of the evaporator pipe accordingly.