Heliostat Tower Solar Thermal Power Optimized Design - Solar Heating - Hvac & R Industry

Reflecting the focus on the condenser to the target rate was only 82.1%

. More data from the experiments. Mirror reflectivity which is immutable, light scattering is immutable. That we can only track in the tracking accuracy and reliability efforts. Tracking technology has become a key tower core thermal power generation system.

We use is "a difference of magnification" type of sensor structure, the sensor has obtained national invention patents. Has applied for patents in many countries. International PCT Search Report in search results is very good, is original invention. In this sensor, we use the embedded microprocessor based on sensor data for analysis. And build a loop road idea that the open-loop and closed-loop automatic switching function. That is better than the open loop tracking GPS and PLC's fixed, and good traditional sensor closed loop control. Using GPS and PLC are open-loop control of the tracking technology, the drawback is lack of precision. Traditional sensor accuracy, but the reliability is not good, vulnerable Environment Interference. Tracking accuracy of our closed-loop control has reached 0.005 degrees.

2. Using the optimized design costs.

Reduce costs include manufacturing costs and construction costs of two parts. Heliostat construction of large power plant construction of the high installation costs, required large scale construction equipment and heavy-duty. We are considering the decomposed heliostat for installation personnel to operate, such as small mirrors, consider the weight of the construction workers can afford. Batch plant manufacturing process will reduce costs. Small size mirror flatness better able to reduce the condenser of the spot rate of deformation.

Simplified mechanical transmission drive mechanism reduces the cost of heliostat design of the past to pursue large scale in order to share the cost of the mechanical parts, but the system been raising the cost. We simplify the driving mechanism, heliostat area per unit manufacturing costs down even lower. Miniaturized multi-chip lens design to better wind stability.

We designed a test system, here is the test system parameters.

1. Mirrors: 3.2mm thick, ultra-white Bolvar, size is 0.6m X 0.6m.

2. Heliostat: mirror number is 80, the total area is (0.6m X 0.6m) X 62 = 28.8m2.

3. Lens arrangement: horizontal 9, 9 vertical lines. 80 lens. Have a place reserved for PV cells.

4. Horizontal rotation angle: 120 degrees (90 degrees to meet the system needs)

5. Tilt angle: 75 degrees. Up to standard, down 75 degrees.

6. Drive power: 4 Amp Hours / Day. DC 12V-owned photovoltaic cells, with 6AH battery.

7. Drive mechanism: two step Motor Combined turbine worm reducer. 42-type stepping motor, drive current 1A.

8. Effective tracking of time: not less than 6.5 hours / day

System test time from August 2008 to October 2009

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by: gaga

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