Someone has suggested that the device shown in Fig. P4163

Chapter 4, Problem 4163

(choose chapter or problem)

Someone has suggested that the device shown in Fig. P4163 be used to move the maximum force F against the spring, which has a spring constant of k. This is accomplished by changing the temperature of the liquidvapor mixture in the container. You are to design such a device to close sun-blocking window shutters that require a maximum force of 0.5 lbf. The piston must move 6 inches to close these shutters completely. You elect to use R-134a as the working fluid and arrange the liquidvapor mixture container such that the temperature changes from 708F when shaded from the sun to 1008F when exposed to the full sun. Select the sizes of the various components in this system to do this task. Also select the necessary spring constant and the amount of R-134a to be used.