An evaporator includes a housing having a liquid inlet interface, a liquid outlet interface, and a vapor outlet interface. The evaporator also includes, according to various embodiments, a porous media disposed in the housing and having a porous wall that defines a conduit. The conduit defined in the porous media may be in fluidic communication between the liquid inlet interface and the liquid outlet interface of the housing. Also, fluidic communication between the conduit defined in the porous media and the vapor outlet interface of the housing may be through the porous wall of the porous media.