Safe Fuel/Air Slow Compression

R. P. Hart and K. Hughes, Gilbarco/Veeder-Root

Input Vapor Mix: 0 to 50% unleaded fuel vapors in air; for ignition point issues you can assume the worst case mix, whatever that is. Water vapor unknown, but assume this can vary from dry to almost condensing.

Temperatures: Vapor mix input: -25C to 45C Ambient (surrounding compressor): -25C to 45C

Compression Rate - Input: 40 cubic centimeters per second average to compress 580 liters over 4 hours.

Compression Volume Ratio: Compress vapor mix from atmospheric pressure to 1/5 or 1/10 original volume (prefer 1/10, can live with 1/5). Consider that compressed mixture is output to a limited size pressure storage tank. Compression output starts at atmospheric pressure; proceeds towards final, higher pressure after a total of 580 liters are compressed and stored in 4 hours. Ample time is then allotted for cooling back to ambient temperature.

Compressor Size: Assume an idealized design with a cylinder, oil sealed piston, input check valve, output check valve. Arrange size/shape, wall thickness, materials, piston travel, diameter, cycle rate, cooling as needed to achieve specified total compression amount in specified time within safe limits to prevent ignition during compression stroke. How small and inexpensive can it be?