A heat transfer device for cooling a heat source, comprising: a storage chamber; a coolant housed within the storage chamber at an initial pressure; a cooling chamber adjacent to the storage chamber; one or more heat transfer components positioned and configured to facilitate heat transfer from a heat source to the cooling chamber, wherein the heat source is distinct from the cooling chamber; a fluid passage between the storage chamber and the cooling chamber; and a barrier element having: (i) a closed configuration in which the barrier element is configured to restrict the coolant from flowing from the storage chamber through the fluid passage and into the cooling chamber; wherein in the closed configuration heat flows away from the heat source to the coolant causing an increase in the temperature and in the pressure of the coolant; and (ii) an open configuration in which the barrier element is configured to permit the coolant in the storage chamber to flow from the storage chamber through the fluid passage and into the cooling chamber, thereby reducing the temperature of the coolant as the coolant expands into the cooling chamber and / or in the fluid passage, wherein the barrier element is configured to reconfigure from the closed configuration to the open configuration in response to a trigger condition, wherein the trigger condition includes at least one of: at least one of the coolant housed within the storage chamber, the barrier element, and a sensor reaching a trigger temperature, and at least one of the pressure of the coolant housed within the storage chamber, the barrier element, and the sensor reaching a trigger pressure. a storage chamber; a coolant housed within the storage chamber at an initial pressure; a cooling chamber adjacent to the storage chamber; one or more heat transfer components positioned and configured to facilitate heat transfer from a heat source to the cooling chamber, wherein the heat source is distinct from the cooling chamber; a fluid passage between the storage chamber and the cooling chamber; and a barrier element having: (i) a closed configuration in which the barrier element is configured to restrict the coolant from flowing from the storage chamber through the fluid passage and into the cooling chamber; wherein in the closed configuration heat flows away from the heat source to the coolant causing an increase in the temperature and in the pressure of the coolant; and (ii) an open configuration in which the barrier element is configured to permit the coolant in the storage chamber to flow from the storage chamber through the fluid passage and into the cooling chamber, thereby reducing the temperature of the coolant as the coolant expands into the cooling chamber and / or in the fluid passage, wherein the barrier element is configured to reconfigure from the closed configuration to the open configuration in response to a trigger condition, wherein the trigger condition includes at least one of: at least one of the coolant housed within the storage chamber, the barrier element, and a sensor reaching a trigger temperature, and at least one of the pressure of the coolant housed within the storage chamber, the barrier element, and the sensor reaching a trigger pressure. (i) a closed configuration in which the barrier element is configured to restrict the coolant from flowing from the storage chamber through the fluid passage and into the cooling chamber; wherein in the closed configuration heat flows away from the heat source to the coolant causing an increase in the temperature and in the pressure of the coolant; and (ii) an open configuration in which the barrier element is configured to permit the coolant in the storage chamber to flow from the storage chamber through the fluid passage and into the cooling chamber, thereby reducing the temperature of the coolant as the coolant expands into the cooling chamber and / or in the fluid passage, wherein the barrier element is configured to reconfigure from the closed configuration to the open configuration in response to a trigger condition, wherein the trigger condition includes at least one of: at least one of the coolant housed within the storage chamber, the barrier element, and a sensor reaching a trigger temperature, and at least one of the pressure of the coolant housed within the storage chamber, the barrier element, and the sensor reaching a trigger pressure. at least one of the coolant housed within the storage chamber, the barrier element, and a sensor reaching a trigger temperature, and at least one of the pressure of the coolant housed within the storage chamber, the barrier element, and the sensor reaching a trigger pressure.