science

Rainpower

Rainpower is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Rainpower rather than just read about it. In short: Rainpower AS is a Norwegian company which develops, designs, manufactures and sells equipment for hydropower electricity generation. The company provides Pelton, Francis, and Kaplan turbines, as well as pump turbines, small hydropower plants, turbine governor, oil pressure systems, valve controllers, exciters, valves, gates, pipes, and other products and services related to the hydropower equipment industry.

Key takeaways

Rainpower belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Rainpower to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Rainpower from memory before moving on to harder problems.

Reference excerpt

Rainpower AS is a Norwegian company which develops, designs, manufactures and sells equipment for hydropower electricity generation. The company provides Pelton, Francis, and Kaplan turbines, as well as pump turbines, small hydropower plants, turbine governor, oil pressure systems, valve controllers, exciters, valves, gates, pipes, and other products and services related to the hydropower equipment industry.

History The company dates back to 1853 when Kvaerner Brug AS was established by Mr. Oluf A. Onsum. Later, forces were joined with Sørumsand Verksted. Kværner expanded rapidly, having acquired the hydraulic businesses of several other companies, such as NOHAB, KMW, Tampella, among others. In 1999, General Electric Company acquired Kvaerner's hydropower business for $70.5m, and merged it with its own hydro division under the name GE Hydro. In 2005, GE Hydro, with the goal of divesting from the hydropower industry, sold its Sørumsand workshop to NLI AS; two years later, this same company bought the complete Norwegian hydro business from GE, and established the new company Rainpower ASA. The remaining business of GE Hydro was later sold to Andritz. As of 2012, Rainpower ASA is 100% owned by Børre Nordheim-Larsen through his two companies NLI Utvikling III AS (62%) and NLI AS (39%).

Operations Rainpower is headquartered at Kjeller, near Oslo. Rainpower provides equipment for generating electricity based on hydropower. Its turbines consist of Francis turbines, reversible pump turbines, Pelton turbines, and Kaplan turbines.

References

"Rainpower's hydro heritage". Water Power & Dam Construction Magazine. September 23, 2008. Retrieved January 28, 2012.

Worked examples

Example 1 — a first encounter with Rainpower

Start with the simplest possible case. Write down what Rainpower claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Rainpower before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Rainpower ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Rainpower

In research: Rainpower appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Rainpower in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Rainpower is common in secondary-school and first-year university syllabi. It links to neighbouring topics Companies based in Lillestrøm, Engine manufacturers of Norway, Hydropower, so understanding it makes those chapters shorter.
In everyday life: Look for Rainpower outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Rainpower in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Rainpower means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Rainpower out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Rainpower in simple terms?

Why does Rainpower matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Rainpower?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Rainpower.