Copper tubing is joined to the absorber of a flat-plate solar collector as shown.
The aluminum alloy (2024-T6) absorber plate is 6 mm thick and well insulated on its bottom. The top surface of the plate is separated from a transparent cover plate by an evacuated space. The tubes are spaced a distance L of 0.20 m from each other, and water is circulated through the tubes to remove the collected energy. The water may be assumed to be at a uniform temperature of Tw = 60°C. Under steady-state operating conditions for which the net radiation heat flux to the surface is q”rad = 800 W/m2, what is the maximum temperature on the plate and the heat transfer rate per unit length of tube? Note that q”rad represents the net effect of solar radiation absorption by the absorber plate and radiation exchange between the absorber and cover plates. You may assume the temperature of the absorber plate directly above a tube to be equal to that of the water.
Investment Theory:(Assume no corporate taxes unless noted otherwise)In a world with no taxes, no transaction costs, and no costs of financial distress, are the following ...Aug 14 2020
Assume Paper Mate company is planning to introduce a new executive pen that can be manufactured using either a capital-intensive method or a labor-intensive method The es...Mar 24 2020
How would e-commerce improve the revenue/collection cycle?Here is a tip:E-commerce uses the internet to transact with customers and other businesses, allowing all the imp...Apr 12 2021
A pro-life group wanted to test the effectiveness of an antiabortion commercial. Two random samples, each of 250 respondents, were recruited in Atlanta, Georgia. One grou...Apr 25 2020
The United States witnessed an expansion almost a decade long during the 1990s, a period of significant economic growth with low unemployment.What must have been true of ...Jun 02 2018
The ECGC does the following: A. Issues the guarantees to the exporters and policies to the bankers B. Issues policies to the exporters and guarantees to the bankers C. Is...Nov 26 2019
A person called me claiming to be from something that I now know he is not from, and was a scammer. I gave him my full name, date of birth and high school I graduated fro...Apr 21 2020
Please help with Part 1, 2, and 3… Help will be greatly appreciated and the correct answer will g… Show more Please help with Part 1, 2, and 3… Help will be greatly appre...May 28 2020
Question 40 of 75. Leon sold residential rental property he had owned for three years. As part of this sale, Leon realized gain on the sale of the rental hou $1231 $1245....Aug 29 2020
A team working at a cat food company had the business objective of reducing nonconformance in the cat food canning process. As the team members began to investigate the c...Jun 20 2020