The results are in! PDF Print E-mail

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RAW DATA AVAILABLE!!! The most efficient hot water solar system on the market

to date and now the results are available. There is no more speculation about

efficiencies and percentage figures. It is a pleasure to reveal a solar heat pump.

This unit comprises of a heat pump that has a power consumption of

500 Watt only; to heat 300 litres of domestic water and in addition is backed

up by a glycol based solar panel!.

See figure 1

 

 

 

 

 

  

           SOLAR POWER AND HEAT PUMPS WORKING TOGETHER - THE LATEST GERMAN TECHNOLOGY

                        

 

 

 

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In figure 1, a glycol solar panel is connected to a 500 Watt Heat Pump. (The heat pump is the square white image in Figure 1. The heat pump and 300Litre hot water cylinder are built into one unit for highest efficiency heat transfer)

 

Ordinarily, the heat pump can operate without the solar panel. The WWK 300 Sol heat pump has a built in heat exchanger for the purpose of transferring excess heat from the solar panel into the hot water cylinder. If the solar panel is not connected to the heat pump, the total power consumption of the heat pump remains 500 Watt. If the panel is connected the 500 Watt power is reduced

even further to heat a total of 300 litres to 55 0C (with the solar panel connected temperatures of up to 70 0 C are possible.

 

   

 

 

POWER CONSUMPTION AND HOT WATER GENERATED

 

 

To confirm the electrical savings, a practical experiment was performed on an already installed heat pump. An energy meter was connected to the heat pump and solar circulating pump to determine the power consumed from Escom to run the system. The water consumption was measured with a standard brass water flow meter that you will find on your house main supply. The family that is using the heat pump/solar system consists of two parents and one daughter and are situated in Wilderness, George in the Western Cape.Table 1 illustrates  the power consumed and water used:

 

TABLE 1: Cost of heating water using heat pump with solar combined
Date

Water Reading

(Kilo Litres)

Electrical Reading

(Kilo Watt Hours)

Water Used

(Kilo Litres)

Electricity used

(Kilo Watt Hours)

Cost

(Rands)

R1.01 per Kilo Watt Unit

      Cost per Month     
24.04.2010 0.000 0.00 0.000 0.00 R 0.00 Ignore April
12.05.2010 3.651

42.15

 3.561 42.15 R 42.57  
22.05.2010 5.211 57.74 1.560 15.59 R 15.75  
30.05.2010 6.433 74.40 1.222 16.66 R 16.83 R 60.95 for May
6.06.2010 7.738 89.63 1.305 15.23 R 15.38  
19.06.2010 9.526 115.29 1.788 25.66 R 25.92

R 56.08 for June
10.07.2010 12.171 147.83 2.645 32.54 R 32.87  
20.07.2010 13.641 168.46 1.470 20.63 R 20.84  
28.07.2010 15.760 196.30 2.119 27.84 R 28.12  R 68.68 for July
03.08.2010 17.317 216.19 1.557 19.89 R 20.09  
             

 

The results are staggering! The Heat Pump, combined with solar, provideds 300 Litres of domestic hot water for a family at an average of R 62.00 per month! The results speak for themselves!