Water-ammonia refrigeration system using solar energy

Claim 1

A water-ammonia refrigeration system using solar energy, comprising a. a first ammonia solution circuit including a solar radiation heater connected to a high pressure deabsorbing boiler for producing ammonia vapor, a reabsorber for ammonia vapor, and a pump for circulating rich solution to the heater and boiler and returning weak solution to the reabsorber; b. a second ammonia solution circuit including a reabsorber for ammonia vapor, a low pressure deabsorbing boiler to produce ammonia vapor and cool the solution for cooling purposes, and a pump for circulating weak solution from the boiler to the reabsorber; c. an ammonia vapor circuit including means having a first valve therein for conveying ammonia vapor from the high pressure deabsorbing boiler of the first solution circuit to the reabsorber of the second solution circuit; d. an ammonia vapor and liquid ammonia circuit including means having a second valve therein for conveying vapor from the high pressure deabsorbing boiler of the first solution circuit to a condenser, means for conveying liquid ammonia from the condenser to evaporator means to produce ammonia vapor and cool the liquid ammonia for cooling purposes, and means for conveying the ammonia vapor to the reabsorber of the second liquid circuit; and e. means responsive to the intensity of solar radiation for closing said first valve and opening said second valve when the solar radiation intensity is greater than a predetermined value and for opening said first valve and closing said second valve when the solar radiation intensity is less than said predetermined value.