Question

急急急！！求助好心人帮翻译一段英语！！十分感谢！！

In the first experiment, as an improved volumetric receiver system, a SiC fibre mesh has been compared as a stand alone system to a combined version consisting of a mesh plus a SiC parallel channel monolith. The results are presented in Fig.9. At air outlet temperatures of 300-550 ℃, the system reaches efficiencies of 75-92％. This is mainly caused by excellent absorption properties and an enormous amount of specific surface. However, due to its short length of only 3.5 mm, radial heat transfer is suppressed, leading to an inhomogeneous temperature and flow distribution in the receiver sample as a consequence of the gaussian-like flux distribution of the concentrated solar radiation. In contrast, the combined system enables a radial heat transfer due to the good thermal conduction properties of the SiC monolith. Because the monolith also dominates the flow resistance properties of system, a more homogeneous temperature distribution is reached, which generally leads to lower peak temperatures at the front part of the absorber material. Secondly, three metallic catalyst carriers have been compared, Fig. 10. Similar to the fibre mesh, flow predominantly penetrates through the colder parts of the receiver, a fact which is enhanced by the linear pressure drop characteristics of the material. To avoid peak temperatures over 1000℃, the average air outlet temperature had to be limited to 400℃ with the 800 and 1600 cpsi material. Due to its higher specific surface, which leads to lower front temperatures, the 1600 cpsi material 2-3％ higher efficiencies. A slight improvement can be observed with the third carrier with the narrowing in between. The average air outlet temperatures achieved were a little higher due to a more homogeneous temperature distribution. However, as can be seen from pressure loss curves, the narrowing of the channels is not as distinctive as it is necessary for receiver application and further samples will be soon manufactured.

Answer 1

在第一个实验中，作为一种改进的容积接收系统，碳化硅纤维网格一直比较作为一个单独的系统，以合并版本构成的一个网状另加碳化硅平行通道庞然大物。结果是在图9 。在风口的温度300-550 ℃时，系统达到效率的75-92 ％ 。这主要是由于优良的吸收性能和大量的具体浮出水面。不过，由于其短期的长度只有3.5毫米，径向传热是打压，从而导致非均匀的温度和流量分布在接收样品作为一个后果，高斯样磁通分布集中的太阳辐射。相比之下，结合制度，使径向传热由于良好的热传导性能的碳化硅庞然大物。因为庞然大物，也主宰了流动阻力特性的系统，更均匀的温度分布是达到了，这通常会导致低峰值温度在前面部分的吸收材料。第二，三种金属催化剂载体进行了比较，图。 10 。类似的纤维网，流为主，渗透通过较冷部分的接收器，一个事实，这是提高线性压降特性的材料。为了避免峰顶温度超过1000 ℃ ，平均空气出口温度要限制在400 ℃与800及1600 cpsi材料。由于其较高的比表面积，从而导致较低的前端气温下降， 1600 cpsi材料2-3 ％ ，高效率的需求。略有改善，可观察到与第三个载体，逐步缩小两者之间。平均风口温度达到一个高一点，因为一场更加均匀的温度分布。不过，可以看出，从压力损失曲线，缩小了渠道，是不是与众不同，因为这是必要的接收器应用，并进一步样本，将尽快制品

Answer 2

在第一实验方面，如一个改良的测定体积的接收器系统，照抄原文纤维网孔是比较如台子孤独的系统到一个有网孔的组合版本加一个照抄原文平行的通道巨型独石。 结果在 Fig.9 被呈现。 在空气出口温度 300-550 ℃, 系统达成效率 75-92％. 这主要地由优良吸收特性和一个巨大量的特定表面所引起。然而，由于它的只有 3.5 毫米的短长度，径向热移动被镇压,对由于集中太阳的放射线的像 gaussian 一样流出分配的在接收器样品中的不同质温度和流程分配带领。 在差别，组合的系统使光线的热能够转移由于照抄原文巨型独石的好热传导特性。 因为巨型独石也支配系统的流程抵抗特性, 较多的同种。第二，三个金属的催化剂运送者已经被比较, 图 10. 类似纤维网孔，流程居多穿透过接收器的较寒冷的部份, 被线压力下降材料的特性提高的一种事实。 避免最高的超过 1000 的温度℃, 平均的空气出口温度必须被限制在 400℃与 800 而且 1600cpsi 材料。由于它的比较高特定的表面, 带领降低前面的温度, 这 1600 cpsi 材料 2-3％较高的效率。 微小的进步能用那个变窄与第三个运送者一起观察在。之间 由于比较同种的温度分配，稍微达成的平均的空气出口温度比较高。然而, 如同能被从压力损失曲线见到, 通道的变窄不像它那么有特色对接收器申请是必需的而且更进一步抽取样品意志很快被制造。