The glass tube which envelopes the absorber and the absorbant coatings can both largely reduce heat loss of the receiver and improve the energy and exergy efficiencies of PTC.

• 在吸收管外加玻璃套管或加吸收涂层都对减少接收器热损失,提高装置的能量效率与(火用)效率有明显的效果,玻璃套管和吸收涂层的成本效益都很好。