Thus, temperature resistive collector covers combining a high transmisivity with alow U-value are required.One possibility is to use capillaries made of glass instead of plastics.

• 因此，需要一种既耐高温又具有低传热系数的透明集热盖板，而使用由玻璃制成的毛细管替代塑胶材料则成为可能。