A split-system heat pump*?

produces 13,600 BTU/h, from 17F (outdoor) to 70F (indoor),
and uses 1,160W to do so. (R410A, COP: 3.44 BTU/h/W).

The system is replaced with an air compressor, which takes the 17F air and compresses it to
125 psig. Exhaust air is used to preheat intake in a counter-flow heat exchanger
(assume 100% efficient) before expansion.

How many BTU/hr are produced for each Watt in the new system?

Bonus:
The air-compressor is powered by a combined heat & power system which burns
wood to make heat and electricity. It produces 30% electricity and 70% heat.

How many BTU's of heat come from each BTU of heat in the wood?

* Mitsubishi MSZ-A12NA, which "locks out" at 10F.

A Christmas gift to you, hard-won advice: do your own homework. That's why homework is assigned, and doing it yourself is part of education. That's what you're investing your life in now, isn't it?

btw, 70F working-hours inside temperature is unnecessarily high. For business, 68 is quite enough, and for home 66. One or two degrees lower still would be better for energy conservation, and need only a sweater to make them very comfortable. In our home, we keep to 64 F during day and 58 at night, and that's higher than we can easily justify.

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Buying Guide For Outdoor Furniture - Summer is on Its Way!

Are you intending to buy outdoor furniture through the internet? Then there are certain things you need to be aware of and which would be taken into consideration if you were buying yours locally. One thing you can be assured of when it comes to buying furniture for outdoors online is that have a much wider selection of styles, shapes and sizes to choose from.

In this article we provide some tips that could prove useful in helping you to find the right kind of outdoor furniture for your garden that you purchase online.

1. First off look carefully at the company who is selling the furniture and check to see what kind of warranty they provide with the furniture they are selling. Ideally you want companies where they provide a warranty of at least 5 years on any products that you purchase from them to cover any problems relating to quality of materials used or the way it has been constructed.

2. Next look and see what types of guarantees or returns policies they have in place. Remember you are investing quite a considerable amount of money into outdoor furniture and you want to know that if you are not at all happy it can returned or exchanged. Most of the reputable companies offering such furniture will provide a money back guarantee that if unsatisfied with the product in a certain time frame it can be returned and all monies paid returned or allow you to exchange it for another product.

3. As well as looking at how much the outdoor furniture is going to cost you need to take into consideration the charges involved for shipping it to your home. The price you see online may look good, but once you have factored in the costs of shipping this could take the price you pay above the budget you have set.

So if you are unable to easily see what charges the company sets for shipping their furniture move on to the next one on the list. Also when looking at the costs of shipping products the company may offer several different options to you. Certainly what you will pay for this service will depend on the type of service you use. For example next day delivery will be far more expensive than if you choose to wait several days for it to come to your home.

4. Before you make your purchase make sure that you read through the description for it very carefully and also look at the photographs on the site. Those sites who present their products well know how important good quality furniture is for use outdoors.

5. Finally when it comes to buying outdoor furniture online it is wise to invest time in reading through any reviews or testimonials you can of the products and the company. But it is important that you read not just the good but the not so good reviews and testimonials as well. This way you can make a more informed decision in relation to just which of the outdoor furniture companies will provide the best quality furniture and service for you.

About the Author

http://www.zimmer-rattan.com/

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