A dehumidification system for removing water vapor from an airstream, comprising: a dehumidification unit comprising a first and second channel separated by a membrane, wherein the membrane is configured to facilitate removal of water vapor from an airstream flowing through the first channel by facilitating passage of H 2 O from the first channel to the second channel through permeable volumes of the membrane while substantially blocking all other components of the airstream from passing through the membrane; an evaporative cooling unit (12, 74) configured to cool the airstream; and a pressure increasing device on the second channel side of the membrane configured to create a lower partial pressure of water vapor within the second channel than in the first channel, such that the H 2 O moves through the membrane to the second channel, characterized in that there is provided a condensation device configured to receive water vapor from the pressure increasing device and condense the water vapor into liquid water; and a control system configured to control operating conditions of the dehumidification unit and the evaporative cooling unit (12, 74), wherein the control system is configured to control the pressure increasing device to increase the pressure of water vapor at an outlet of the pressure increasing device to a partial pressure of water vapor proximate to a minimal water vapor saturation pressure in the condensation device suitable for subsequent condensing into liquid water and, wherein the control system is configured to continually monitor pressure and temperature conditions of both water vapor upstream of the pressure increasing device and water vapor downstream of the pressure increasing device to ensure that water vapor expelled from the outlet of the pressure increasing device has a partial pressure of water vapor proximate to a minimal water vapor saturation pressure in the condensation device. a dehumidification unit comprising a first and second channel separated by a membrane, wherein the membrane is configured to facilitate removal of water vapor from an airstream flowing through the first channel by facilitating passage of H 2 O from the first channel to the second channel through permeable volumes of the membrane while substantially blocking all other components of the airstream from passing through the membrane; an evaporative cooling unit (12, 74) configured to cool the airstream; and a pressure increasing device on the second channel side of the membrane configured to create a lower partial pressure of water vapor within the second channel than in the first channel, such that the H 2 O moves through the membrane to the second channel, characterized in that there is provided a condensation device configured to receive water vapor from the pressure increasing device and condense the water vapor into liquid water; and a control system configured to control operating conditions of the dehumidification unit and the evaporative cooling unit (12, 74), wherein the control system is configured to control the pressure increasing device to increase the pressure of water vapor at an outlet of the pressure increasing device to a partial pressure of water vapor proximate to a minimal water vapor saturation pressure in the condensation device suitable for subsequent condensing into liquid water and, wherein the control system is configured to continually monitor pressure and temperature conditions of both water vapor upstream of the pressure increasing device and water vapor downstream of the pressure increasing device to ensure that water vapor expelled from the outlet of the pressure increasing device has a partial pressure of water vapor proximate to a minimal water vapor saturation pressure in the condensation device.