Cross-Flow

Locally built Cross-Flow turbines in other developing countries cover a similar range.

1. CONSTRAINTS AND PROBLEMS 1985

Consequently, a Cross-Flow (Michell-Banki) turbine was developed that combined ease of manufacture with considerable adaptability to different situations.

1. CONSTRAINTS AND PROBLEMS 1985

A Cross-Flow turbine with adapter and penstock, a step-up transmission, a mechanical governor with flywheel, a coupling, connecting the flywheel to the alternator, and finally the alternator itself, with switchboard and connecting terminals, comprise what is called the complete electro-mechanical generating equipment, necessary for a rural electrification project (refer fig. 49).

1. CONSTRAINTS AND PROBLEMS 1985

The Ossberger Cross-Flow has around 80 % for a wide range of flow, and the Cross-Flow turbines built in Nepal achieve over 70 %.

1. CONSTRAINTS AND PROBLEMS 1985

Depending on turbine type, this difference is likely to be smaller or even reversed at reduced flow (e.g. Cross-Flow compared to Francis or Propeller) and also in cases where a standardised conventional turbine is installed in non-optimal conditions.

1. CONSTRAINTS AND PROBLEMS 1985

Instruction Manual for the Construction of a Cross-Flow Turbine GATE-Modul 1/13,

Chapter 12 1985

The turbines used are of the Cross-Flow type, designed by the design section of NEA's (National Energy Administration of Thailand) technical division, and built on contract basis by a small workshop in the northern city of Chieng Mai.

1. SALLERI-CHIALSA MICRO HYDEL PROJECT, NEPAL 1985

The two Cross-Flow turbines used are actually the prototypes of the NEA design with a runner diameter of 400 mm and a nozzle width of 50 mm.

1. SALLERI-CHIALSA MICRO HYDEL PROJECT, NEPAL 1985

Fig. 70 is a detail of the Cross-Flow turbine, with one main bearing, the inlet part with gate-operating lever, and a part of the governor connecting-rod visible.

1. SALLERI-CHIALSA MICRO HYDEL PROJECT, NEPAL 1985

For more specific reference, the application range of the two designs of Cross-Flow turbines T1 + T3 built by BYS in Nepal are shown (fig. 22) in relation to a range of standardised conventional machines of BELL in Switzerland.

1. CONSTRAINTS AND PROBLEMS 1985