Cradle Regulator and Hydroelectric Power Plant Project

Point Project Engineering has successfully completed detailed engineering designs, feasibility studies and 3D BIM modeling within the scope of Cradle Regulator and Hydroelectric Power Plant (HEPP) Project Construction Work. The project was implemented on the Bahçesaray Stream in Bahçesaray district of Van province in order to evaluate the energy potential of the Eastern Anatolia Region. This introductory text has been prepared in order to emphasize the expertise of Dotasal Proje Mühendislik and the technical details of the project.

Project Overview

Besik Regulator and HEPP Project is an initiative aiming to provide sustainable energy production by using the hydroelectric potential of Bahçesaray Creek. The project is designed to realize an average annual energy production of 77.036 GWh with an installed power capacity of 23.73 MW. This energy is distributed as 16.091 GWh of förm energy and 60.945 GWh of secondary energy. Pointwise Project Engineering has provided technical and economic optimization of the facilities by using modern engineering techniques and innovative approaches at all stages of the project.

The following basic components have been designed and modeled within the scope of the project:

• Cradle Regulator: It was built on Bahçesaray Stream at 1750.00 m talveg elevation in concrete weight type.< / li>
• Transmission System: Water has been transferred to HEPP with a transmission channel and tunnel with a length of 2848 m.< / li>
• Loading Pool and Forced Pipe: Flow and pressure conditions suitable for energy production have been established.< / li>
• Besik HEPP: Energy production was carried out with a three-unit power plant building at an altitude of 1635.00 m kuyuksuyu.< / li>
• 3D BIM Modeling: Project components are modeled in a 3D environment with Revit and Civil 3D software, ensuring coordination and conflict prevention in field applications.< / li>

Technical Details and Engineering Approach

1. Cradle Regulator Design

The Cradle Regulator was designed as a concrete weight type at a geological and topographical location on the Bahçesaray Stream, at a height of 1750.00 m talveg. The regulator is designed to pass 107.40 m3/s, which is a 100-year flood flow rate, with an air share, and 141.40 m3/s, which is a 500-year flood flow rate, without an air share. Main features:

• Spillway: 25.00 m long, designed at a crest elevation of 1755.00 m, the reservoir water level reaches 1756.60 m at the time of flooding.< / li>
• Energy Breaker Pool: A Type 2 energy breaker pool with a length of 13.00 m has been built at the foot of the spillway.< / li>
• Gravel Passage: A single-cover gravel passage with a width of 2.50 m and a height of 1.90 m has been designed for the transfer of sediment to the downstream.< / li>
• Fish Passage: For environmental sustainability, 0.90 m3/s of life water is designed to be released from the fish passage.< / li>

2. Water Intake Structure and Precipitation Pool

The water intake structure has been designed at a threshold elevation of 1751.70 m to ensure the transfer of water from the regulator reservoir to the transmission line. In the design, cover grids were used to prevent the passage of the discus to the transmission line. The sedimentation pool is 50.00 m long, designed with two eyes and sized with hydraulic calculations for the deposition of grains with a diameter of 0.03 mm. The pool is equipped with silt covers for maintenance and repair operations.

3. Transmission System

The transmission system is designed with a length of 2848 m to ensure that the water received from the regulator is transferred to the loading pool and from there to the HPP:

• Transmission Channel: It is designed with a length of 1470 m, a box section, a base width of 4.20 m and a water height of 3.60 m, with a slope of 0.0004.< / li>
• Transmission Tunnel: 1378 m long, 3.60 m diameter modified horseshoe type, designed to operate with 89% occupancy. The tunnel slope was determined as 0.001.< / li>

4. Loading Pool and Forced Pipe

The loading pool is designed to have an active volume of 3016 m3, with a length of 50.00 m and a width of 25.00 m. The normal water level is 1752.93 m, the maximum water level is 1753.93 m. The forced pipe is 2.60 m in diameter and 236.68 m in length and is distributed to the power plant by branch for three units (pipes with a diameter of 2×1.70 m and 1×0.90 m).

5. Besik HEPP and Power Plant Building

Besik HEPP is located on the right bank of Bahçesaray Creek at an altitude of 1635.00 m kuyuksuyu. The power plant has three units (2× 10.55 MW + 1×2.63 MW) and a total installed capacity of 23.73 MW. The turbines operate in the horizontal shaft Francis type with an efficiency of 0.92. The power plant building was designed with a length of 70.00 m and a width of 23.00 m. The generators have been selected to operate with 3-phase synchronous, 0.975 efficiency.

6. Installed Power Optimization

The project flow rate was determined as 22.50 m3/s by analyzing the Flow-Frequency-Probability Table and the Flow-Continuity Curve. This flow rate was selected with a realization rate of 6.21%, and the installed capacity of 23.73 MW was optimized with a gross drop of 117.30 m. Statistical data for the power plant building and electromechanical equipment were used in the cost calculations:

• Cost of the Power Plant Building: 200 × (Installed Capacity, MW)^0.301 USD/kW.< / li>
• Electromechanical Equipment Cost: 491.3 × (Installed Capacity, MW)^0.1 USD/kW.< / li>

7. 3D BIM Modeling

Dotasal Proje Mühendislik has modeled all the components of the project in a 3D environment with BIM technology. The regulator, transmission system, loading pool and power plant building have been modeled in detail, conflicts in field applications have been prevented and data sharing between project stakeholders has been optimized. Dec.

Contributions of Point Project Engineering

Dotasal Project Engineering provided expertise in the following areas in the Cradle Regulator and HEPP Project:

• Feasibility and Hydrological Analyses: Optimum location selection and flow analyses of the facilities were carried out with hydrological data belonging to the period 1965-2010.< / li>
• Detailed Designs: Engineering calculations and detailed drawings of regulator, transmission system and power plant components have been prepared.< / li>
• BIM Integration: By creating a digital twin of the project, productivity has been increased in the processes before and after construction.< / li>
• Environmental Sustainability: Environmental impacts have been minimized with the allocation of fish passage and life water.< / li>

Result

Cradle Regulator and HEPP Project is a success story that demonstrates the expertise and innovative approaches of Dotasal Proje Mühendislik in the field of engineering. The project has been completed in accordance with the principles of technical excellence, economic feasibility and environmental sustainability. Nokta Project Engineering is proud to contribute to Turkey's renewable energy targets with this project.