Specification Design a directly-coupled pumping system (no batteries or power conditioning circuitry) for irrigation purposes near Melbourne (latitude 37.8°S). The only months of interest are December and January, during which period 2.5 million litres are required to be pumped. The relevant insolation data is given in Table H.2. The total pumping head is 8.8 m […]

A typical module will have 36 cells connected in series, each cell typically having the parameters: Voc = 600 mV (25°C) FF = 75% Vmp = 475 mV (25°C) Vmp = 430 mV (45°C) Imp/Isc = 0.95 Each cell can be reasonably accurately represented by the equation where V is the terminal voltage, I is […]

G. 1 INTRODUCTION Aspects of insolation data manipulation are discussed in preparation for designing a stand-alone, directly-coupled PV powered water pumping system. This is followed by an analysis and discussion of typical PV module characteristics and output and the relevance for water pumping system design. An example system design is provided, including discussion of each […]

The following example is based on the approach developed by Sandia National Laboratory, Albuquerque, USA (Chapman, 1987) and automatically incorporates over 23 years of insolation data. An interesting outcome of the study involved in the formation of this model and approach is that accuracy of system design is not lost by basing the design only […]

F. 1 INTRODUCTION The following material outlines two approaches used when designing photovoltaic stand-alone systems. Australian Standard AS4509.2, discussed in Chapter 7, is more recent than either and is normally the method to be used by accredited installers in Australia. The first method detailed here was used extensively by Telecom in Australia during its early […]

A directly-coupled system is one where a low starting torque pump (such as a centrifugal pump) can be driven by a DC motor that receives its power directly from the solar panels. No batteries, inverters, or power conditioning circuitry are used, other than perhaps safety cut-out relays activated by level, flow or pressure sensing transducers. […]

12.1 INTRODUCTION Considerable emphasis in this book is placed on the design of photovoltaic water pumping systems, firstly because water pumping is a major application for photovoltaics and secondly because the design of each system is considerably more complicated than most applications, owing to the large range of water source types, consumer requirements and system […]

All support structures should be anodised aluminium, galvanised steel or stainless steel and need to be designed to withstand the maximum possible wind loading for the particular location (Ibid ). Lock washers or equivalent should be used on all bolts to remove risk of them coming loose during the subsequent 20 years. The structures should […]