How does active solar water heating work?

-

How does active solar water heating work?


Answer:


- Active solar energy systems require mechanical power, usually electric pumps and other apparatuses, to circulate air, water, or other fluids from solar collectors to a location where the heat is stored until used. There are mechanical parts such as pumps and fans to distribute energy.

- Solar collectors to provide space heating or, more commonly, hot water are usually flat panels consisting of a glass-covered plate over a black background where an absorbing fluid (water or a volatile liquid) is circulated through tubes. Solar radiation enters the glass and is absorbed by the black background. Heat is emitted from the black material, heating the fluid circulating in the tubes. In cold climates, a liquid with a low freezing temperature is used because water is a poor absorbing fluid because it can freeze.

- The design of evacuated tube collectors are similar to the flat-plate collector. The difference is that each tube, along with its absorbing fluid, passes through a larger tube that helps reduce heat loss.
Solar collectors are experiencing rapid growth. The global market grew about 50% from 2001-2004. Solar water heating systems are economically viable, paying for themselves in only four to eight years.

Comments

Post a Comment

Popular posts from this blog

Discuss the seven characteristics of useful information.

-
Discuss the seven characteristics of useful information. Answer: The seven characteristics of useful information are: relevant, reliable, complete, timely, understandable, verifiable and accessible. These characteristics are qualities that information should possess to be useful in a business environment. Briefly stated, in order for information to be useful it must be: 1) relevant, meaning that it reduces uncertainty and adds to the decision-making process; 2) reliable information is information that is free from error, and is accurate in its nature; 3) complete information is information that does not omit any important data, facts, or aspects about events or activities; 4) information is timely when it is fully available to enable the decision-making process to proceed; 5) understandable information must be both in an intelligible and useful format; 6) information is considered verifiable if two people, acting independently of each other, produce the same inform
Read more

Why have accounting software packages been designed with separate transaction modules?

-
Why have accounting software packages been designed with separate transaction modules? Answer: : Since every organization does not necessarily use all of the transaction cycles in its operations, it is to the advantage of the organization to be able to "pick and choose" from among various software modules that track and record different transaction cycles. For example, a law firm would have no need to implement a production cycle module. Also, the nature of a transaction cycle varies across the broad spectrum of business organizations. Again, a law firm would have a revenue cycle, but it would not involve the purchase, receipt, and payment for products or merchandise; likewise a retail store chain may not sell any consulting services to its customers.
Read more

A laboratory assistant prepared solution of 0.8 M, 0.6 M, 0.4 M, and 0.2 M sucrose, but forgot to label them. After realizing the error, the assistant randomly labeled the flasks containing these four unknown solutions as flask A, flask B, flask C, and flask D.

-
A laboratory assistant prepared solution of 0.8 M, 0.6 M, 0.4 M, and 0.2 M sucrose, but forgot to label them. After realizing the error, the assistant randomly labeled the flasks containing these four unknown solutions as flask A, flask B, flask C, and flask D. Design an experiment, based on the principles of diffusion and osmosis, that the assistant could use to determine which of the flasks contains each of the four unknown solutions. Include in your answer (a) a description of how you would set up and perform the experiment: (b) the results you would expect from your experiments: and (c) an explanation of those results based on the principles involved. (Be sure to clearly state the principles addressed in your discussion.)
Read more