design type calculation of beat exchanger

例句：

1. 1. The designer of the new car has created a sleek and modern look.
   这款新车的设计师创造了一种光滑而现代的外观。
2. 2. The architect's design for the building is already drawing attention to itself.
   建筑师为这座建筑的设计已经引起了人们的关注。
3. 3. The artist's concept for the painting was revolutionary at the time.
   这位艺术家对这幅画的概念在当时是革命性的。