Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf 83).

The lack of services such as electricity in the rural areas of South Africa has given rise to the use of pump water and the windmills. The ones in use currently are maintenance intensive. There is a corrosive element in water and this sometimes requires plastic or other non-corrosive materials to be used for pump components and pipes. Solar panels are expensive and have low efficiencies. Alternative energy systems such as diesel engine driven- mono pumps or -turbines or windmills are costly, which means that the overall efficiency must be maximized to reduce these costs.

M.Ing. / In this study the performance of a reversible ground-source heat pump, coupled to a municipal water reticulation system, is compared experimentally and with simulations with a conventional air-source heat pump for space cooling and heating. A typical municipal water reticulation system comprises hundreds of kilometres of pipes designed in loops that will ensure adequate circulation of the water. This results in a substantial heat exchanger with great potential. Indirect heat transfer occurs between the refrigerant and ground via the municipal water reticulation system that acts as the water-to-ground heat exchanger. The experimental and simulated comparisons of the ground-source system to the air-source system are conducted in both the cooling and heating cycles. Climatalogical statistics are used to calculate the capacities and coefficients of performance of the ground-source and air-source heat pumps. Results obtained from measurements and simulations indicate that the utilisation of municipal water reticulation systems as a heat source/sink is a viable method of optimising energy usage in the air-conditioning industry, especially when used in the heating mode.

M.Ing. (Mechanical Engineering) / Please refer to full text to view abstract

The air chamber has certain advantages over both the open-top surge tank and the valve-type surge suppressor for controlling pressure surges in pump-discharge lines. The main purpose of this study was to produce charts which can be used for designing or checking the size of an air chamber required for a particular pumping installation. The characteristics method was used to convert the two partial differential equations of momentum and continuity into four total differential equations. The solution of the equations (finite-difference form) was carried through by digital computer to provide the data required for the preparation of the charts. Results obtained on the digital computer by the method of characteristics are checked by the graphical method. Examples demonstrating the use of the charts are included. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate

The peripheral jet pump is examined in both theoretical and in practical applications. One-dimensional, force-momentum theory is applied in a jet pump setting for incompressible fluids. Results from a laboratory model are used for applications design. The scope of practical applications examined include: 1) use as a fish pump, 2) as part of a crab-sampling device, 3) feasibility as a ship's bow thruster. The laboratory tests revealed the inadequacy of the current theory for wide jet spray patterns. The benefit of wide jets on suction and non-benefit on lift performance were established. Other performance aiding factors such partial submergence, partial blockage, and having the jets located at the suction inlet are studied for one phase, two phase and three phase pumping. Also, as a complement to the written theory, computer programs which model the theoretical performance of peripheral jet pumps are available on 5.25" floppy disks. The programs are written for use on IBM PC and compatible computers. *IBM is a registered trademark of International Business Machines. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate

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Thesis (M.S.)--University of Michigan, 1975.