Solar water heating at luxury as well as low income townhouses

Solar water heating system requires a water storage tank and a power collector where the heated water can be used for household activities such as washing and cleaning. The research on solar water finds the presence of nitrite is harmful to health; hence it is not used for consumption.   The operational efficiency of such systems can be improved by implementing the control approaches for heat pumps, circulation pumps and electric heaters. Such systems can be widely used in public institutions and hotels where the hybrid systems are mostly selected by the implementers.

One of the largest markets of the system is China that accounts for 50 per cent of the total water heaters. Some households are using solar water heater, LEDs and other green technologies, and have been able to reduce 90 per cent of their energy consumption. Solar panels and heat pumps should be installed together during construction on rooftop to provide long term substantial electrification at a low cost.  

The Middle East nation Dubai, implemented a number of low cost electrification plans at extreme geographical locations – deserts and mountains. Dubai is preparing to become completely dependent on solar energy by 2050 and have one of the smallest carbon footprints where in the initial phase it is implementing self cleaning solar cells, which have a very high performance and high energy generation efficiency.  The country’s dependency on renewable source is expected to grow from 4 per cent to 75 per cent in the next 5 to 10 years. Dubai municipality lists some of the products for water heating, which are considered suitable for heating water in city’s buildings. These lists are part of effort to implement green building projects.

In UAE 750,000 solar water heaters will be needed in the next five years to meet sustainable energy demands. Country such as Morocco –where energy production through solar has been widely adopted to meet the growing demand has been integrating water heater, photovoltaic cells and LEDs to low income homes and schools – that will ensure higher security  and visibility during nights.

Currently, renewable contribute 2 per cent to the global energy consumptions, and it is expected to grow to 70 per cent in coming five years.  These technologies are new and require proper configuration where the installation, upgrades, maintenance and additional costs of hardware and integration can be high. Researches on clean energy system to promote easy shift from previous system to low-carbon at a low cost are in development phase.

Solar water heaters can be based on - Direct collectors used to circulate water, which is stored in the tank – the system is mostly used in freezing climate. The closed loop system is used in no freezing climate where the sun’s heat can be used to heat fluids. Thermal collectors’ converts sun light into heat, used to heat the water. Most such heaters are wall mounted, with radiators to capture highest amount of radiations and in case of freezing temperatures, non toxic propylene heat-based solar collector is used to circulate hot water through heat exchanger.

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