What Is an Air to water Heat pump?

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What Is an Air to water Heat pump?

• An air to water heat pump is an energy efficient
  product that typically draws 25 to 30 of the
  electricity that would normally be required of a
  standard resistance heater.
• In Engineering terms the COP (Coefficient of
  performance) ratio is 3 4 to 1.
• In laymans terms for every 3 to 4 units of
  energy required for heating only 1 unit of energy
  is consumed.
• Therefore for every 1 kw of input power you will
  get 3 4 kw of output power.

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How does an air to water Heat Pump work and how
does its operation differ to Electric Resistance
Heat

• HEAT PUMP OPPERATION
• The heat of the ambient air is passed over the
  coil of the outdoor heat pump which is then
  absorbed by the refrigerant. The refrigerant is
  then compressed and heated before being pumped
  into a heat exchanger. which then rejects the
  heat of the refrigerant into the water passing
  through the exchanger. In essence, it is like an
  air conditioner except it is in reverse mode to
  produce heat - hence the terminology Reverse
  Cycle Heating
• ELECTRIC HEAT OPERATION
• The energy is forced through an electrical
  resistance element which then rejects this heat
  into the water. Resistance heaters have a COP of
  1 (1 kw in for 1 kw out)

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Why is the introduction of Heat Pumps so
important to the South African Market

• A Recent simulation shows that a total of 580GWH
  of electrical energy is consumed nationwide
  annually to provide hot sanitary water in the
  commercial and industrial sector alone. This
  represents an average load of 66.2MW. Utilising
  average ambient conditions, by introducing heat
  pumps it is estimated that this load can be
  reduced conservatively to 32MW.
• Eskom has forced industry to make substantial KW
  savings to reduce the total electricity load in
  South Africa. The introduction of penalty charges
  is already in process to ensure that these cost
  savings are achieved.
• Industries using large amounts of hot water in
  the process of their business or as part of their
  core business are able to achieve these savings
  immediately by utilising heat pumps as an
  alternative energy source.
• Heat pumps are environmentally friendly as they
  reduce the load of Eskom to produce more energy,
  further the refrigerants used are also ozone
  friendly

Heat pumps .. Saving you Energy consumption
saving you money and working towards improving
our country and environment
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F.A.Q.
Q How long has Heat-pump Technology been
available ? A For over 50 years! Q Are you
able to accurately calculate KW and Rand
Savings? A Yes, by installing a data logger to
measure your current usage. Q Can a Heat pump be
adapted to a current geyser , storage vessel? A
Yes, it is easily adaptable to most storage
vessels. Q How much space is required to install
a heat pump? A This is dependant on your current
storage and the size of the heat-pump required,
however the space require is minimal. It is
always recommended that a heat pump is installed
outside. Q Is Eskom/Esco offering any rebates to
install Heat-pumps? A Yes, Only to commercial
and industrial sectors in the form of capital
funding through Esco. Q Is a Heat pump
environmentally friendly? A Most defiantly, as
it uses less than 25 to 30 of electricity
required of a standard resistance heater i.e..
COP of between 3 4. Gases used to generate
electricity are also environmentally friendly.
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F.A.Q.
Q How much Hot Water Does the average consumer
use? A This varies from industry to industry
however 66 of water consumed for bathing or
showering will consist of hot water. Q What
must be considered when calculating what size
heat pump is to be used? A What is the current
storage capacity? What is the current kw of the
electric elements used? What is the recovery
period? (very important) Water temperature in
and water temperature out? Is the client
experiencing problems with the hot water
supply? Assess if current capacity is sufficient
for future needs. Q Where should cold water be
drawn off from the tank? A From the bottom of
the tank where the coldest water is. Q Where
should hot water be replaced into the tank? A At
the top of the tank! Q Do heat pumps work in low
temperatures? A Yes, but we recommend that
electrical elements get left in the existing
installation to assist in extreme conditions and
also to allow for backup during servicing and
breakdowns. As your ambient temperatures reduces
so does the COP of the Heat pump.
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Payback periods Solar Vs Heat pumps Based on 2007
figures
More Users faster pay back periods
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Rentals Heat Pumps

• Rentals are shown as an operating expense.
• No deposit required.
• Monthly Rental costs can be absorbed by savings
  on electricity costs.
• Rentals are fully tax deductible, thereby
  minimizing Income Tax obligations.
• Ownership guaranteed at end of period.

• Equipment can be upgraded during contract period,
  thereby providing flexibility to change as
  technology improves or clients requirements
  change.
• Increased profit margins with no capital outlay.
• Finance department does not have to approve
  capital funding

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Rental Example- Case Study
Costing at September 2007 Existing TWO 4000
litre geysers each with 72 kW electric
elements Heat Recovery required 8000 litres
from 20C to 65C in 4 hours Using TWO machines
each 1000 litres/hr Select AquaHeat CD Model
BWH 25 with power input of 22kW _at_ 1200 litres/hr
_at_ a tariff of R 0.50 per kWh plus max. demand
charge of R 63.00 per kVA Energy saving
(144kW44kW) x 4 hrs x 2 x30 days x 9 months
216 000kWh (ASSUMES ENERGY SAVING FOR ONLY
75 OF THE YEAR)? Hence kWh charge 216 000 X
R 0.50 R108 000.00 KVA demand 50kW x R
63 x 2 x 12 R 75 600.00 R183
600.00 THE ESTIMATED INSTALLED COST OF THE HEAT
PUMP IS R400 000.00 THE ESTIMATED RENTAL
COST Monthly Rental Amount R 10,600.00 Annul
Rental Expenditure R127,200.00 Annual Cost Per
above R183,600.00 Net Saving / Profit
P.A. (R55,800.00)
Zithulele Hospital Near Hole In the Wall
Eastern Cape
Example based on 2007 figures Rentals can
realise immediate savings
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Heat Pump vs. Solar
Heat pump
solar

• Not dependant on weather conditions to heat.
• Does not require large areas/space for
  installation.
• Can achieve minimal payback period of 1 year.
• Ease of installation and maintenance.
• Waste cold air can be utilised to further reduce
  energy cost
• Capital and installation costs are substantially
  lower.

• 100 dependant of weather conditions
• Requires large areas/space to install.
• Minimal payback period of 3.5 years.
• Requires a more technical installation than Heat
  Pump and maintenance can be fairly complex.

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Supply and Demand

• There are currently only 6 Registered Heat Pump
  Suppliers registered with Eskom in South Africa.
• Due to the increasing demand of the commercial
  and industrial sector as well as residential
  requirements the demand for heat pumps exceeds
  the ability of importers to supply.
• Eskom is embarking on a drive to legislate the
  discontinuation of imported electrical geysers
  and boilers into the country.

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Esco funding

• Esco will fund up to 60 of the capital required
  for industry to change to heat pumps. Currently
  the calculation is based on 50 of R6250.00 per
  kw dependant on usage.
• Data loggers must be installed for a minimum of 1
  week to accurately calculate current usage.
• Eskom will inform you within 1 week of the
  capital funding they will allow the client.
• Clients are required to fill out forms and
  funding will only be paid once installation is
  complete

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Commercial and industrial target markets

• Hospitality industry
• Boarding establishments Schools Hostels etc
• Prisons
• Hospitals
• Farming industry
• Industry with large staff compliments
• Industrial