This work aims to provide an efficient and innovative solution for a temperature control system of an electronic component for space applications. The concept is based on the evaporation of a coolant flowing through a porous media. In the device considered, the coolant is forced to flow through a porous substrate and evaporates at the exit face. The concept was investigated experimentally, using a lab-scale device designed and constructed for feasibility demonstration and performance evaluation, including operation in a continuous or pulse mode, response time, coolant liquid consumption, and maximum heat disposal under different conditions while keeping the temperature below the target. The lab-scale device consists of two main parts: a heater and a cooling unit. The device was placed in a vacuum chamber to provide a controlled exit pressure. The pressure at the exit surface dictates the evaporating temperature of the coolant and the corresponding latent heat. The tested coolant in use was distilled water, and a flow control valve was used to activate the cooling unit when temperature increased. In a continuous operation mode test, both the heater and the cooling unit were activated continuously, and the heater temperature was kept stable at around 25°C, while an external heat of 35W (2.1W/(cm²)) was delivered by the heater. Water consumption was 0.014 gr/sec, corresponding to the disposal of 35W by evaporation. In addition, the ability to control the temperature by changing the exit pressure was demonstrated; as the exit pressure slightly decreased, the saturation temperature also decreased, and a lower temperature profile was achieved while the change of the coolant flow rate was negligible. It was found that there is a lower limit to the temperature that can be controlled due to a phenomenon of water freezing on the outlet surface from the porous substrate. The appearance of ice on the porous plate constitutes a barrier that does not allow continuous flow through the surface, thereby the temperature rises rapidly. If the required working point is close to the freezing point of water, another coolant should be considered. A physical model is proposed to support the system design, to enable sensitivity studies with respect to variations in the properties of the porous media, and to evaluate the system's performance under various operating conditions and with different potential coolants.