Chapter 4 describes electric motors accessories for pumps, various types of electric motors and reasons affecting their quality, duties they are meant for, effect of voltage and frequency on motor performance starting switches and motor starter installation for motor starters trouble shooting of starter various protecting devices for electric motors step by step procedure for cleaning of electric motors, lubrication of electric motors and trouble shooting and safety measures in the operation of electric equipments.

Chapter 5 consists of Pumpset Installation and trouble shooting care to be taken in location of pumpset, proper foundation, Grouting of pumpset on foundation and pumpset arrangement and suction pipeline and delivery pipe and fixation of electrical auxiliaries and connections have been discussed briefly. Locating pumpsets is very important. Nornally located in the centre of farm will avoid water consumption and water seepage. Therefore, indirectly contributing to energy conservation. It should be the highest place in the farm so as to avoid flooding etc. during rainy season. Suction pipeline should avoid no. of bends and also any air leaks in suction line reduces efficiency of the pumpsets drastically. Similarly, de3livery pipeline has to have minimum bends joint low resistance valve and preferably of RPVC. Electrical auxiliaries and their fixation, maintenance trouble shooting, farmers guidelines have been included in the Chapt. The Chapt.4 also covers remedial measures in existing electrified pumps and major factor influencing the efficiency.
Diesel Engine in Agriculture Pump System are covered in

Chapt.6, it describes in detail how to select an appropriate diesel engine for agriculture pumping based on requirements of diesel engine like low diesel consumption, low lubricant oil consumption, less wear and tear of the parts. Low exhaust smoke and noise and BHP required for pump through various hydrological conditions at site. These requirements are important, as studies have shown have continued working by wrongly selected engines and are at present costing expenditure of about Rs50 crore to Punjab Farmers alone. Transmission losses in the case of belt driven diesel engine pumpset are about 30% more as compared to directly coupled or monobloc pumpsets. Therefore, these conditions are necessary requirements have been illustrated alongwith brief introduction of installation, operation and maintenance of diesel pumping set.

Chapter 7 deals with defects existing in the present pumping system and possible rectifications in them to improve their efficiency and reduce energy consumption by their improved conditions. The rectification measures have been classified into 4 types. The first of them being of low resistant foot valves and reflex valve which is a minimum cost method to improve the efficiency and pay back period of cost of improvement is hardly few months. Similarly the other rectification measures will require a high investment like use of RPVC pipe and improving of the pumping system and finally the use of all these methods plus replacement by mono bloc pumpsets. While cost involved in the last category would be much higher but this can be done in phased manner and wherever replacement is needed, it should be replaced with energy efficiency monobloc pumpsets. The Chapter 7 also describes the energy savings obtained in all the four categories i.e. 12%,22%, 33% and 50% respectively. The replacement of foot valve is the cheapest method, 12% with energy efficiency. Chapter 7 also describes specifications of rectification material and methods of measurement of discharge which is useful in improving the efficiency.

Chapter 8 describes economics and energy savings which can be achieved by various types of rectification measures and benefits obtained by use of efficient pumping system so as to establish necessity of conservation of energy in agricultural pumping system and are briefed in last para of this summary.

Chapter 9 describes alternative non-conventional energy resources which can be used in agricultural pumping systems. This covers use of wind energy, selection of site for windmills availability of wind mills and pumps installations and maintenance of wind mill pumping systems. Use of hydro power in agricultural pumping micro turbines for pumping, utility of hydraulic ram and lastly solar pumping systems and biogas engines for agricultural pumping have also been provided.                       Back