A certain walk-in freezer requires an average of 3000 W of thermal power to be removed from it to maintain a temperature of −4◦C on a hot day in July, when the ambient temperature is 35◦C. (a) What is the coefficient of performance of cooling, for the freezer, assuming an ideal (reversible) heat pump? (b) What would be the new COP if the freezer were installed in the basement, where the air temperature is 19◦C? (c) How much electrical power does the freezer use (for 3000 W of cooling) when installed in each of the two locations?
Show more
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.
Read moreEach paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.
Read moreThanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.
Read moreYour email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.
Read moreBy sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.
Read more