© Helderberg Solar Energy (Pty) Ltd - 2018

Helderberg Solar Energy

Helderberg   Solar   Energy   is   a   renewable   energy   company   that   specialises   in   lowering   the   cost   of   energy   for   Commercial   and   Residential   applications   by using the latest innovations in green technology. Our   product   range   currently   offers   Heat   Pumps,   Pool   Heat   Pumps,   Solar   Geysers,   Solar   Borehole   Pumps,   PV   (Photovoltaic)   Systems   and   Low   Energy (LED) Lighting. Helderberg   Solar   Energy   value   our   customers   and   is   proud   to   stand   out   as   a   pioneer   in   the   renewable   energy   industry   as   far   as   technical   knowledge, after sales service and maintenance is concerned.

What is a heat pump?

A   heat   pump   is   a   very   efficient   water   heating   device.   It   uses   a   small   amount   of   electricity   to produce up to four times more heat energy. By   connecting   a   heat   pump   to   your   existing   hot   water   cylinder   you   can   divide   your   hot   water electrical consumption by four. Unlike   a   solar   geyser,   a   heat   pump   is   not   directly   dependant   on   the   sun   and   therefore   it   can operate   day   and   night,   winter   and   summer,   ensuring   the   highest   possible   saving   and   producing hot water 24/7.

How long have heat pumps been around?

Heat   pumps   have   been   around   for   decades   and   are   very   widely   used   in Europe for central heating systems. Some   of   the   hostels   at   Stellenbosch   University   in   the   Western   Cape   for example have used heat pumps for hot water for more than 25 years. Their   popularity   has   increased   drastically   due   to   the   increase   in   the price    of    electricity    in    recent    years    and    this    increase    in    demand    has decreased the price considerably.

How does a heat pump work?

A   heat   pump   works   like   an   air   conditioning   unit   in   reverse.   It   extracts   heat from   the   ambient   air   surrounding   it,   enabling   it   to   heat   the   refrigerant which is then compressed causing it to get even hotter. This   is   then   run   through   a   heat   exchanger   where   the   energy   is   drawn   off   to heat   the   water   and   then   the   refrigerant   is   allowed   to   expand   again,   thus cooling   it   down   and   enabling   it   again   to   absorb   heat   from   the   surrounding air. Electricity   is   only   used   to   run   a   fan   and   compressor   and   the   heat   energy   is provided indirectly by the sun.
“Clubbing   energy   efficiency   with   renewable   energy   will   give   us   the   much-needed   window   to   incubate   the   renewable   energy sector, particularly large solar, without having to increase the price of electricity.” Jamshyd Godrej
Renewable Energy Solutions to save Earth for our Children
“The   cost   of   renewable   energy   is   largely   a   function   of   initial   investment   cost....   Once   a   renewable   energy   facility   is   built,   at   least with   fixed-rate   financing,   the   cost   of   power   from   that   facility   is   fixed   throughout   its   lifetime.   Not   so   for   fossil   fuels,   where   the   cost of power will vary in the future with fuel prices.” Jose Amaya

Heat Pump & Solar System Savings

The   popularity   of   renewable   energy   technology   for   water   heating   has   sharply   increased   with   the   increasing   awareness   of   sustainable   living   and   the   ever increasing cost of electricity. However,   as   with   many   products   on   the   market,   one   can   find   considerably   contradicting   claims   with   regards   to   the   different   technologies   used   for water heating. Many of these claims and advertisements are nothing more than marketing “scams” and have no facts behind them. We   would   like   to   equip   our   readers   with   as   much   factual   information   as   possible   to   be   able   to   make   an   informed   decision,   specifically   taking   in consideration the possible savings and RIO of solar water heaters, hot water heat pumps, PV systems or other renewable energy options available.
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What is a solar water heater?

A solar water heater (SWH) uses energy from the sun to heat water. It works on two basic principles. Firstly,   when   water   gets   hot   it   rises   due   to   density   differences   between   hot   and   cold   water (thermosiphon effect). Secondly, black objects absorb heat. A   solar   water   heater   collects   heat   from   sunlight   and   irradiation   through   the   solar   collector and transfer that heat to water, which is then stored in a geyser or tank. Solar    geyser    systems    comprise    of    two    or    three    main    parts:    the    collector,    an    energy transfer fluid (frost areas) and the storage tank. For   low-income   households   who   do   not   have   an   electrical   geyser,   the   technology   offers important health and quality of life benefits.

Collector

The   solar   collector   absorbs   solar   radiation   and   transfers   the   energy,   in the form of heat, to the fluid within it. The   solar   collector   is   generally   a   flat   plat   or   an   evacuated   tube   collector. More basic systems may be a coil of black pipe within a box or similar. Transfer Fluid This   is   the   heat   transfer   medium.   In   a   direct   system   (frost   free   areas), the transfer medium is the potable water from the storage container. In   an   indirect   system,   the   transfer   fluid   is   generally   a   mix   of   water   and glycol,    which    passes    heat    energy    to    the    storage    container    via    an isolating heat exchanger. In   areas   in   South   Africa   where   temperatures   drop   below   freezing,   an indirect system is the best system to use.

Storage Tank

As   with   a   conventional   geyser,   the   hot   water   storage   container   is   thermally insulated to retain heat. Solar geysers are usually larger than electric geysers and better insulated. This allows for the maximisation of solar gains. Solar water heaters are classified as either active or passive systems. An   active   system   uses   a   pump   to   circulate   the   fluid/water   between   the collector and the storage tank. A   passive   system   uses   natural   convection   (thermosiphon)   to   circulate   the fluid/water between the collector and the storage tank.
© Helderberg Solar Energy (Pty) Ltd - 2018

Helderberg Solar Energy

Helderberg   Solar   Energy   is   a   renewable   energy   company   that   specialises   in   lowering   the   cost   of energy    for    Commercial    and    Residential    applications    by    using    the    latest    innovations    in    green technology. Our   product   range   currently   offers   Heat   Pumps,   Pool   Heat   Pumps,   Solar   Geysers,   Solar   Borehole Pumps, PV (Photovoltaic) Systems and Low Energy (LED) Lighting. Helderberg   Solar   Energy   value   our   customers   and   is   proud   to   stand   out   as   a   pioneer   in   the renewable   energy   industry   as   far   as   technical   knowledge,   after   sales   service   and   maintenance   is concerned.

What is a heat pump?

A   heat   pump   is   a   very   efficient   water   heating   device. It   uses   a   small   amount   of   electricity   to   produce   up   to four times more heat energy. By   connecting   a   heat   pump   to   your   existing   hot   water cylinder    you    can    divide    your    hot    water    electrical consumption by four. Unlike    a    solar    geyser,    a    heat    pump    is    not    directly dependant   on   the   sun   and   therefore   it   can   operate day    and    night,    winter    and    summer,    ensuring    the highest    possible    saving    and    producing    hot    water 24/7.

How long have heat pumps been around?

Heat   pumps   have   been   around   for   decades   and are   very   widely   used   in   Europe   for   central   heating systems. Some   of   the   hostels   at   Stellenbosch   University   in the   Western   Cape   for   example   have   used   heat pumps for hot water for more than 25 years. Their   popularity   has   increased   drastically   due   to the   increase   in   the   price   of   electricity   in   recent years   and   this   increase   in   demand   has   decreased the price considerably.

How does a heat pump work?

A    heat    pump    works    like    an    air    conditioning unit    in    reverse.    It    extracts    heat    from    the ambient   air   surrounding   it,   enabling   it   to   heat the     refrigerant     which     is     then     compressed causing it to get even hotter. This    is    then    run    through    a    heat    exchanger where    the    energy    is    drawn    off    to    heat    the water   and   then   the   refrigerant   is   allowed   to expand     again,     thus     cooling     it     down     and enabling    it    again    to    absorb    heat    from    the surrounding air. Electricity    is    only    used    to    run    a    fan    and compressor   and   the   heat   energy   is   provided indirectly by the sun.
“Clubbing   energy   efficiency   with   renewable   energy   will   give   us   the   much-needed window   to   incubate   the   renewable   energy   sector,   particularly   large   solar,   without having to increase the price of electricity.” Jamshyd Godrej
Renewable energy solutions to save Earth for our Children
Request a Quote Request a Quote

What is a solar water heater?

A   solar   water   heater   (SWH)   uses   energy   from   the   sun to heat water. It works on two basic principles. Firstly,   when   water   gets   hot   it   rises   due   to   density differences       between       hot       and       cold       water (thermosiphon   effect).   Secondly,   black   objects   absorb heat. A   solar   water   heater   collects   heat   from   sunlight   and irradiation   through   the   solar   collector   and   transfer that   heat   to   water,   which   is   then   stored   in   a   geyser   or tank. Systems   comprise   of   three   main   parts:   the   collector, an   energy   transfer   fluid   (frost   areas)   and   the   storage tank.

Collector

The   solar   collector   absorbs   solar   radiation   and transfers   the   energy,   in   the   form   of   heat,   to   the fluid within it. The   solar   collector   is   generally   a   flat   plat   collector or     an     evacuated     tube     collector.     More     basic systems   may   be   a   coil   of   black   pipe   within   a   box or similar

Transfer Fluid

This    is    the    heat    transfer    medium.    In    a    direct system   (frost   free   areas),   the   transfer   medium   is the potable water from the storage container. In     an     indirect     system,     the     transfer     fluid     is generally   a   mix   of   water   and   glycol,   which   passes the    energy    to    the    storage    container    via    an isolating heat exchanger. In   areas   in   South   Africa   where   temperatures   drop below    freezing,    an    indirect    system    is    the    best system to use.

Storage Tank

As   with   a   conventional   geyser,   the   hot   water storage    container    is    thermally    insulated    to retain    heat.    Solar    geysers    are    usually    larger than electric geysers and better insulated. This   allows   for   the   maximisation   of   the   solar gains.    Solar    water    heaters    are    classified    as either active or passive systems. An   active   system   uses   a   pump   to   circulate   the fluid/water    between    the    collector    and    the storage tank. A    passive    system    uses    natural    convection (thermosiphon)    to    circulate    the    fluid/water between the collector and the storage tank. For   low-income   households   who   do   not   have an    electrical    geyser,    the    technology    offers important health and quality of life benefits.
© Helderberg Solar Energy (Pty) Ltd - 2018

Helderberg Solar Energy

Helderberg   Solar   Energy   is   a   renewable   energy   company   that   specialises in     lowering     the     cost     of     energy     for     Commercial     and     Residential applications by using the latest innovations in green technology. Our   product   range   currently   offers   Heat   Pumps,   Pool   Heat   Pumps,   Solar Geysers,    Solar    Borehole    Pumps,    PV    (Photovoltaic)    Systems    and    Low Energy (LED) Lighting. Helderberg   Solar   Energy   value   our   customers   and   is   proud   to   stand   out as    a    pioneer    in    the    renewable    energy    industry    as    far    as    technical knowledge, after sales service and maintenance is concerned.

What is a heat pump?

A   heat   pump   is   a   very   efficient   water   heating   device.   It   uses   a   small amount of electricity to produce up to four times more heat energy. By   connecting   a   heat   pump   to   your   existing   hot   water   cylinder   you   can divide your hot water electrical consumption by four. Unlike   a   solar   geyser,   a   heat   pump   is   not   directly   dependant   on   the   sun and    therefore    it    can    operate    day    and    night,    winter    and    summer, ensuring the highest possible saving and producing hot water 24/7.

How long have heat pumps been around?

Heat   pumps   have   been   around   for   decades   and   are   very   widely   used   in Europe for central heating systems. Some   of   the   hostels   at   Stellenbosch   University   in   the   Western   Cape   for example have used heat pumps for hot water for more than 25 years. Their   popularity   has   increased   drastically   due   to   the   increase   in   the   price of   electricity   in   recent   years   and   this   increase   in   demand   has   decreased the price considerably.

How does a heat pump work?

A   heat   pump   works   like   an   air   conditioning   unit   in   reverse.   It   extracts heat    from    the    ambient    air    surrounding    it,    enabling    it    to    heat    the refrigerant which is then compressed causing it to get even hotter. This   is   then   run   through   a   heat   exchanger   where   the   energy   is   drawn   off to   heat   the   water   and   then   the   refrigerant   is   allowed   to   expand   again, thus   cooling   it   down   and   enabling   it   again   to   absorb   heat   from   the surrounding air. Electricity   is   only   used   to   run   a   fan   and   compressor   and   the   heat   energy is provided indirectly by the sun.
“Clubbing   energy   efficiency   with   renewable   energy   will   give   us the   much-needed   window   to   incubate   the   renewable   energy sector,   particularly   large   solar,   without   having   to   increase   the price of electricity.” Jamshyd Godrej
Renewable energy solutions to save Earth for our Children
Request a Quote Request a Quote

What is a solar water heater?

A   solar   water   heater   (SWH)   uses   energy   from   the   sun   to   heat   water.   It works on two basic principles. Firstly,   when   water   gets   hot   it   rises   due   to   density   differences   between hot   and   cold   water   (thermosiphon   effect).   Secondly,   black   objects   absorb heat. A   solar   water   heater   collects   heat   from   sunlight   and   irradiation   through the   solar   collector   and   transfer   that   heat   to   water,   which   is   then   stored in a geyser or tank. Systems   comprise   of   three   main   parts:   the   collector,   an   energy   transfer fluid (frost areas) and the storage tank.

Collector

The   solar   collector   absorbs   solar   radiation   and   transfers   the   energy,   in the form of heat, to the fluid within it. The   solar   collector   is   generally   a   flat   plat   collector   or   an   evacuated   tube collector.   More   basic   systems   may   be   a   coil   of   black   pipe   within   a   box   or similar.

Transfer Fluid

This   is   the   heat   transfer   medium.   In   a   direct   system   (frost   free   areas),   the transfer medium is the potable water from the storage container. In   an   indirect   system,   the   transfer   fluid   is   generally   a   mix   of   water   and glycol,   which   passes   the   energy   to   the   storage   container   via   an   isolating heat exchanger. In   areas   in   South   Africa   where   temperatures   drop   below   freezing,   an indirect system is the best system to use.

Storage Tank

As    with    a    conventional    geyser,    the    hot    water    storage    container    is thermally   insulated   to   retain   heat.   Solar   geysers   are   usually   larger   than electric geysers and better insulated. This   allows   for   the   maximisation   of   the   solar   gains.   Solar   water   heaters are classified as either active or passive systems. An   active   system   uses   a   pump   to   circulate   the   fluid/water   between   the collector and the storage tank. A   passive   system   uses   natural   convection   (thermosiphon)   to   circulate the fluid/water between the collector and the storage tank. For   low-income   households   who   do   not   have   an   electrical   geyser,   the technology offers important health and quality of life benefits.