PV WIND PERFORMANCE ENHANCING METHODS AND APPARATUS

摘要

Pressure equalization between upper and lower surfaces of PV modules of an array of PV modules can be enhanced in several ways. Air gaps opening into the air volume, defined between the PV modules and the support surface, should be provided between adjacent PV modules and along the periphery of the array. The ratio of this air volume to the total area of the air gaps should be minimized. Peripheral wind deflectors should be used to minimize aerodynamic drag forces on the PV modules. The time to equalize pressure between the upper and lower surfaces of the PV modules should be maintained below, for example, 10-20 milliseconds. The displacement created by wind gusts should be limited to, for example, 2-5 millimeters or less. For inclined PV modules, rear air deflectors are advised for each PV module and side air deflectors are advised for the periphery of the array.

主权项

1. A cart for cleaning PV modules of a PV installation, comprising:
a cart body including first and second sides and first and second ends; at least a first support device connected to the first side of the cart body; a second support device connected to the second side of the cart body, the first and second support devices configured for supporting the cart body for movement along a direction extending through the first and second ends of the cart body along a row of PV modules, with the first support device disposed in the vicinity of a first side of the row of PV modules and the second support device disposed in a vicinity of a second side of the row of PV modules; a motor configured to drive the cart body in a self-propelled manner; at least a first brush carried by the cart body and configured to clean a PV module; and at least one sprayer carried by the cart body and configured to clean a PV module.