Rex Investment Limited - Tanzania's leading solar energy contractor

We have over 8 years experience in providing solar energy solutions with specific expertise in design, solar PV installation, maintenance, and solar project management.

This project portfolio aims at demonstrating:

- our expertise and operational capacity in solar energy

- our extended geographical area of intervention

- the diversity of our projects.

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Nelson Mandela African Institute of Science and Technology

Partnership with Pension Property Limited for installation of Solar Hot Water Heaters

End-users

Masters Students at NMAIST, student hostels               

Partner

Pension Property Limited, the company which is made up of the National Social Security Fund NSSF, the PPF pension funds and the Local Authorities Pensions Fund LAPF

Location

Arusha, northern Tanzania

Completion

2011

Objectives

Installation of solar hot water heaters for student's hostels, block A and B

Located in Arusha, Tanzania, the Nelson Mandela African Institute of Science and Technology (NM AIST-Arusha) is one in a network of Pan-African Institutes of Science and Technology located across the continent. These institutes, which are the proud brainchild of Nelson Mandela, envision to train and to develop the next generation of African scientists and engineers with a view to impacting profoundly on the continent’s development through the application of science, engineering and technology (SET). http://www.nm-aist.ac.tz/

The state of the art facility provides accommodation for students pursuing a Masters and PhD degree in their respective fields. All hostels are being supplied with an uninterrupted supply of hot water as Rex Energy equips the houses with solar water heaters, designed to produce a total of 6600 liters of hot water each day. Installation was completed in November 2011.

Implementation

33 solar water heaters in total were installed at Muhimbili University. Each heating unit has a tank which holds 200 l of water, designed to produce a total of 6600 liters of hot water each day. Cold water enters the tank, then goes to the collector in a series of pipes which absorb sunrays and heat up the water. The hot water gets collected again in the storage unit.  The well insulated tank works like a thermos and keeps the water hot for a long time – depending on usage it can remain hot up to 2 days even when it rains.

Conclusion

Solar Water heaters provide an economical and sustainable alternative to conventional water heaters which consume a large amount of electricity. Solar water heaters—also called solar domestic hot water systems—can be a cost-effective way to generate hot water for home use. They can be used in any climate, and the fuel they use —sunshine— is free.