Experimental study on wind tunnel force measurement of flat roof Trough Condenser (FRTC)

Application of Internet of Things Based on Wireless Sensor in Tunnel Construction Monitoring

“…(3) Transmission network: the transmission network of tunnel construction monitoring system needs to summarize the data and transmit the data to the database and data processing system. From the structural system of the Internet of Things, it belongs to the corresponding equipment in the transmission layer of the Internet of Things [17,18] The transmission network needs to support more flexible data transmission and transfer modes, which can be completed with the help of MCU-32 main control and communication module and wiring port. The wired transmission modes of the collector include RS485 transmission, TCP/IP network transmission, and optical cable transmission, and the wireless transmission modes include wireless data transmission, radio transmission, and GPRS/CDMA transmission.…”

Wind‐Induced Response and Stow Position Analysis of the Flat Roof Parabolic Solar Collector

“…In this article, the wind pressure time course of the FRPSC was obtained through the wind tunnel pressure measurement experiment, and then the modal analysis and wind-induced response analysis of the FRPSC model were carried out by ANSYS software, and the results are compared with the GPSC. Finally, the stow position of the FRPSC is analyzed based on Resistance coefficient [22] 0.063 0.072 0.018 0.113 Fundament tilting torque coefficient [22] 0.030 0.046 À0.011 0.042…”

“…Lift coefficient [22] À0.098 À0.180 À0.229 À0.102 the wind-induced response of the FRPSC. The article is concluded as follows: 1) By calculating the natural frequency and vibration shapes of the PSC under different elevation angles, it is found that there is little difference in the natural frequency and vibration shape of the structure at different elevation angles of the PSC.…”

“…From Table 2, we can know that the wind‐induced displacement response of the 0–90 working condition is close to that of the 90–90 working condition, but the wind‐induced vibration coefficient of the 0–90 working condition is significantly smaller than that of 90–90 working condition. At the same time, Qiong Zou [ 22 ] used the wind tunnel force measurement experimental to derive that the resistance coefficient and the fundament tilting torque coefficient under four typical elevation angles are approximately 0 when θ is 90°, and the minimum lift coefficient appears when β is 0°. It can be seen that the FRPSC has the smallest force, the smallest wind‐induced displacement response, and a relatively small dynamic amplification effect under the working condition of 0–90.…”

“…The concave mirror surface will generate a lot of wind suction, and the convex surface will generate a lot of wind pressure, so the mirror surface will have a large displacement. Second, the blocking effect of the roof and parapet on the incoming wind will lead to the upward accumulation of the incoming wind, which increasing the lift of the collector, [ 22 ] and the mirror displacement response will also increase correspondingly in the case of large vertical elevation angles. Therefore, this article believes that when the vertical elevation angle of the PSC is 90°, it is the most unfavorable vertical elevation angle condition among the four typical vertical elevation angle conditions.…”