Performance Analysis On A Novel Z-Blade Reaction Type Turbine For Low Head And Low Flow Pico Hydro System

Md Basar, Mohd Farriz (2017) Performance Analysis On A Novel Z-Blade Reaction Type Turbine For Low Head And Low Flow Pico Hydro System. PhD thesis, Universiti Teknikal Malaysia Melaka.

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Pico hydro generation system with a capacity less than 5kW has been gaining increasing attention as preferred methods of clean power generation system. Unlike large hydro power system, this technology’s superiority lies in the fact that it can harness electrical energy even from a small stream of water as energy sources and it does not poses any adverse environmental impact. This technology has huge potential to be optimized for the usage globally in areas which they are still many untapped water resources. From literature, current small scale low head and low flow type hydro turbines are expensive and complex for small power generation and small domestic consumer level. Considering this problem, a low cost and low head low flow hydro turbine are critically needed to encourage the use of hydropower available from any sources naturally like creeks and small rivers. The main objective of this research is to investigate, design, develop prototype, test and analyze a new, low cost, yet with the high performance of a simple reaction water turbine for the mean of power production from the low head, low flows hydro sources. Through this research, a pico hydro system with Z-Blade reaction type turbine (ZBT) is presented as a new innovative design of a simple reaction water turbine and the performance characteristics of the prototype are demonstrated using experimental approach. Hence,the governing equations are presented in this research for the ideal and practical condition. The design and construction procedures for a ZBT turbine using locally available materials are described. Such design and procedures address the problems associated with the cost and applicability of the device to low head low flow water source. Experimental procedures are explained with illustrative pictures of the test rig and its instrumentation used for the testing of the prototype of the ZBT. Based on the derived non-interference rotational speed equation, the evidences reveals that, this ZBT will not experience any jet-interference phenomena throughout the entire range of its rotational speed. The outcome of the parametric analysis on the simple reaction water turbine in this research emphasized the potentials and intrinsic characteristics performance of ZBT, which are found to be superior to other type of simple reaction water turbine. The factor that would represent the fluid frictional energy loss associated with the fluid flow through the ZBT is discussed in great detail. This factor,known as “k-factor” will have a significant influence on the overall performance of the ZBT. The theoretical analysis and experimental evidences has proven that the ZBT with Type B shows superior performance at low operational water head and water flow. The results also showed that the performance of Ø0.025m: 1 inch blade was better compared to Ø0.015m: 0.5 inch blade. It has the capability to achieve high values of rotational speed (up to 500 rpm) with minimal mass flow rate (around 2.1 L/sec), high mechanical power (approximately 100W), low energy loss (average 20%), and high efficiency (up to 78%) at low head water condition (5 m). As a conclusion,an optimized simple geometrical design, high performance and significantly low cost simple reaction turbine design has been presented, in which, with a highly potential power production to be used for low head low flow hydro sources.

Item Type: Thesis (PhD)
Uncontrolled Keywords: Electric utilities, Electric machinery, Induction, Turbines, Hydraulic turbines, Hydroelectric power plants
Subjects: T Technology > T Technology (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Library > Tesis > FTK
Depositing User: Muhammad Afiz Ahmad
Date Deposited: 20 Sep 2017 07:17
Last Modified: 20 Sep 2017 07:17
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