A cooling system for providing chilled air, comprising (a) a cooling coil configured to accept air at a higher temperature and emit air at a lower temperature by passage through a flow of coolant water in the cooling coil, resulting in a content of relatively warm water; (b) an evaporator contained within a vacuum chamber, and a conduit configured to channel the relatively warm water from the cooling coil to the evaporator; said evaporator configured to allow the passage of the relatively warm water therethrough, and to absorb heat from the warm water, thereby reducing the temperature of the water, while also forming a content of water vapor; (c) an absorber contained in the vacuum chamber, and configured to accept the water vapor formed in the evaporator; while also configured to accommodate a flow of a concentrated desiccant that is capable of absorbing the water vapor and thereby becoming diluted and heated; (d) a regenerator that is capable of receiving at least a portion of the diluted and heated desiccant, said regenerator configured to accept and direct external air to the desiccant, thereby causing a release of at least some of the water content in the desiccant, to the atmosphere, so as to re-concentrate the desiccant to a selected concentration value; wherein it further comprises an external source of make-up water in communication with the cooling coil, configured to replenish water lost during operation of the cooling system, wherein the make-up water combines with the relatively warm water exiting the cooling coil via the conduit and the combined flow enters the evaporator, and that the system lacks of a condenser for condensing water that is directed through the evaporator. (a) a cooling coil configured to accept air at a higher temperature and emit air at a lower temperature by passage through a flow of coolant water in the cooling coil, resulting in a content of relatively warm water; (b) an evaporator contained within a vacuum chamber, and a conduit configured to channel the relatively warm water from the cooling coil to the evaporator; said evaporator configured to allow the passage of the relatively warm water therethrough, and to absorb heat from the warm water, thereby reducing the temperature of the water, while also forming a content of water vapor; (c) an absorber contained in the vacuum chamber, and configured to accept the water vapor formed in the evaporator; while also configured to accommodate a flow of a concentrated desiccant that is capable of absorbing the water vapor and thereby becoming diluted and heated; (d) a regenerator that is capable of receiving at least a portion of the diluted and heated desiccant, said regenerator configured to accept and direct external air to the desiccant, thereby causing a release of at least some of the water content in the desiccant, to the atmosphere, so as to re-concentrate the desiccant to a selected concentration value; wherein it further comprises an external source of make-up water in communication with the cooling coil, configured to replenish water lost during operation of the cooling system, wherein the make-up water combines with the relatively warm water exiting the cooling coil via the conduit and the combined flow enters the evaporator, and that the system lacks of a condenser for condensing water that is directed through the evaporator.