Imagine that the instructor has retired and moved to Tallaha

Imagine that the instructor has retired and moved to Tallahassee, Florida. The instructor wants to install a solar domestic hot water system for his home. He asks his former student to help him choose the solar collector. The number of people in his household is 5. The water storage tank will use fiberglass insulation and the system has no heat exchanger. The tilt angle of the solar collector will be 35° facing east. The collector to be used is Gobi solar collectors. Using the collector rating for cloudy day and the specifications of the Gobi solar collector, specify the number of collectors needed. Use the worksheet provided on the Blackboard to solve the problem. Estimate the capital cost of the solar collectors.

Solution

Solar Hot water system:

Generally it is installed at the top of the house (or) terrace where sunlight is continuously available and heats the water during sunny day and stores the heated water in a insulated storage tank for use when it is required.

The cost of solar water heat depends on the size and the systemwhat we prefer to install.

The small size of the system is 100 liter per day that means it deliver 100 liters of water in to hot in a sunny day at 60 degree celsius.

For a family of 5 members it may take 28,000 to 30,000 approximately for a hot water system to their home.

The Gobi solar collector is a best flat plate collector.The Gobi has a less profile and good performance when compared to other collectors.

It has 3 size and 2 absorber surface.

The Gobi offers maximum performance it rate is top 10 in the solar collector.

It is easy to install.

High performance and more efficiency.

Gobi solar collector are of 3 different sizes:

Gobi 3366=26.8 sq.ft

Gobi 408=32.3 sq.ft

Gobi 410=40.3 sq.ft

Hot water system;

For 20 gallons per personfora day .1.5colder climate to 2 warmer climate gallons per sqft of the Gobi area.

5 person household * 20 gal/person=100 gal tank

100 gal tank/1.5 gal/sq.ft Gobi area (cold climate)= 2 Gobi 408 collectors

32.3*2=64.6 ,64.6 sq.ft*1.5 gal=96.4 gals

The capital cost of the solar collector is one gobi collector cost is $2660 .for two gobi collector it costs$5320

dollars.