In order to consolidate the radiator model and the hybrid system
model during the simulation and to enhance the simulation
efficiency, the model is developed based on such assumptions as
follows:
• The nocturnal sky radiator is placed horizontally toward the sky.
• The operation of the radiator is assumed to be a steady state
process.
• The water and heat flow inside the radiator panel is onedimensional
along its length direction. There is no temperature
gradient in the width direction.
• Heat loss from the back and edges of the radiator panel can be
negligible [3].
• The thermal capacity of the construction of the radiator plate is
neglected.