Hydropower energy : How does it works?

-

 


Hydropower is a renewable source of energy, where electricity is generated by fast-flowing water using hydraulic machines. Different types of turbines are used to convert the potential and kinetic energy of water into mechanical and finally into electrical energy by using generators. Today Hydropower supplies 20 % of energy demand worldwide and it prevents the burning of 22 billion gallons of oil or 120 million tons of coal each year (A. DEMIRBAS, 2007).

 


 Energy conversion


The goal of HEPP is to extract energy from water flowing under pressure. Water possesses both kinetic and potential energy is used to generate electricity. The difference in water level between two locations, known as the Head, creates potential energy. The output from a hydropower plant is the function of the net head, available discharge, and unit efficiency factor (Suraj Dahal, 2013).

 

Pros of hydropower energy

Hydropower has long been recognized as a cost-effective, long-term energy source. Its advantages include the fact that it is non-polluting in the sense that it emits no heat or noxious gases, that its technology is dependable and adaptable, and that hydropower stations have higher efficiency and a longer lifespan.


Refrences;


(Suraj Dahal, 2013)

(A. DEMIRBAS, 2007)



Comments

Post a Comment

Popular posts from this blog

Current scenario of hydropower and forecast of surplus-Hydroelectricity in Nepal

-
Image
Dikendra acharya   BE Mechanical, Kathmandu University  The first analysis of the current scenario is essential to predict surplus production. The following figure shows the data of Nepal's  operated, under-construction, and purposed hydropower plants. Current scenario of hydropower in Nepal ( NEA 2020/2021)         Currently, Nepal's different hydropower plants are generating 1145 MW of electricity. The graph above shows that an additional 943 MW of energy will be produced shortly, followed by 3219 MW after some time, which is now in the planning stage.  Forecast of surplus-Hydroelectricity in Nepal: what the future looks like?
Read more

Solar water Pumping

-
Image
What is solar water pumping? The lack of sufficient infrastructure and reliable sources of electrical energy in Nepal's rural areas has resulted in several quality-of-life problems. For example, locals walk for an extended period to get water to complete household tasks because their villages are far from water sources and at much higher altitudes. Installing two water tanks, one near the water source to collect water from its running start and the other near the settlement at a higher height with the appropriate head, will solve the problem. The water will then be lifted from the lower tank to the top using high-efficiency solar DC or AC water pumps. Standard pipes are used to distribute the water collected in the higher tank . Advantages of solar water pumping: Energy resource is almost universally available as their primary source is the sun A high correlation between energy available and water needs Low environmental impact and reliable   Fuel cost is...
Read more

Classification of hydropower on different basis

-
Image
Hydropower can be classified into different types, according to different bases.   According to  the  availability of head   ●         Low head power plants (<30m) ●         Medium head power plants (30-300 m) ●         High head power plants (>300 m)   According to capacity   ●         Large (> 100 MW) ●         Medium (10 – 100 MW) ●         Small (1 MW– 10 MW) ●         Mini (100 kW – 1 MW) ●         Micro (5 – 100 kW) ●         Pico (< 5 According to  the  nature of Flow regulation   ●      ...
Read more