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GEOTHERMAL HEAT PUMPS

Geothermal heat pumps harness the ambiant warmth of the earth to provide efficient heating or cooling options returning over three times the power they consume. Ideal for underfloor domestic heating systems.

These ground-source heat pumps use the natural heat storage capacity of the earth or ground water to provide energy efficient heating, cooling and hot water.

 

 

Geothermal heat pumps (GHP) are a relatively new technology that can save homeowners money.  Geothermal heating can be more efficient than electric resistance heating. These systems are typically more efficient than gas or oil-fired heating systems. They are more energy efficient than air-source heat pumps because they draw heat from, or release heat to, the earth, which has moderate temperatures year round, rather than the fluctuating air temerature.

Geothermal heat pump

What is a geothermal heat pump?

 

A GHP system consists of indoor heat pump equipment, a ground loop, and a flow center to connect the indoor and outdoor equipment. The heat pump equipment works like a reversible refrigerator by removing heat from one location and depositing it in another location. The ground loop, which is invisible after installation, allows the exchange of heat between the earth and the heat pump. Dedicated water heaters can be added which operate whenever there is a demand for hot water. Geothermal heat pumps have demonstrated energy savings over air heat pumps because they extract energy from the constant temperature of the earth (via a water pipe buried in the earth) to condition the air in a home. In a sense, geothermal is a partially-renewable form of energy.

 

What is a vertical loop system?

  

A vertical ground loop system may be installed in vertical bore holes 45 to 150m deep. Each hole contains a single loop of pipe. After the pipe is inserted, the hole is backfilled. The number of loops required depends on ground conditions, air conditioning and heating load and the depth of each hole. This design is well suited for retrofit applications where landscraping is already complete.

 

What is a horizontal loop system?

  

A horizontal ground loop system is usually selected when adequate space is available and trenching can be easily accomplished. A series of parallel pipes are laid out in trenches 0.9 to 1.8 m below the ground surface.Then backfilled. Often multiple pipes are used to maximize the heat transfer capability of each trench. The amount of pipe and the size of the ground loop field is based on ground conditions, heating and cooling requirement.

 

What is a water immersion loop system?

   An application located near a lake or pond can benefit from a surface water system. Many local building codes require a retention pond for rain run off from large roof and parking area of new buildings. These retention ponds can become low cost and efficient energy sources. Because of the excellent thermal property of water, a loop may be submerged in a series of coils beneath the water surface.

 

How much do geothermal heat pumps cost?

 

All heat pumps are available with a cooling option, please add £480.

 

  

 

 Geothermal heat pumps 8 to 15 KW

Weight kg

Price £

GHP 8 KW 220V/50hz

105

1480

GHP 10 KW 220V/50hz

110

1820

GHP 13 KW 380V/50hz

120

2100

GHP 15 KW 380V/50hz

130

2280
Prices exclude delivery.

Prices include internal hot water circulator pump.

Guarantee 2 years

  

 
 

 Geothermal heat pumps 20 to 30 KW

Weight kg

Price £

GHP 20 KW 380V/50hz

180

3200

GHP 26 KW 380V/50hz

195

3370

GHP 30 KW 380V/50hz

210

3900

 

 

 
     

Heat pump technical specifications.

 

 

 

 

Which heat pump?

 

Most domestic reqirements (average 3 bedroomed house) are easily covered by a 220v/50hz heat pump offering 8 to 10 kw output.

 

Larger houses will need a 380v (3 phase) electrical supply to run a 13 to 20 kw heat pump

 

Commercial users please contact us for heat pump technical specifications to suit your requirement.

  

Heat pump with cooling

Type

8KW

10KW

13KW

15KW

Dimensions,weights,connection dimensions

Dimensions

HxWxD

1000x600X600 mm

Weight

kg

105

110

120

130

Refrigerant

Type

R407C

Filling weight

kg

2

2.3

2.5

2.8

Permissible operating pressure

Mpa

3

3

3

3

Pipe connector-hot side

Inch

G1"

G1"

G1"

G1"

Pipe connector-cold side

Inch

G1"

G1"

G1"

G1"

Evaporator

Type

Brazed plate heat exchanger

Condenser

Type

Brazed plate heat exchanger

Compressor

 

ixScroll

IxScroll

IxScroll

IxScroll

Performance Heating

Heat output

at B0/W35(1)

kW

8

10.2

13.1

15.5

Power consumption

kW

1.9

2.36

2.95

3.53

Performance factor

 

4.21

4.32

4.44

4.39

Heat output

atW10/W35(2)

kW

10.1

12.9

16.7

19.6

Power consumption

 

kW

1.89

2.39

3.01

3.57

Performance factor

 

 

5.34

5.4

5.55

5.49

Process medium

 

Brine/water values in [ ]

Process medium

 

Brine made from water with 33Vol.% ethylene glycol

Volume flow

inside

m3/h

0.88[0.72]

1.1 [0.9]

1.4[1.2]

1.7[1.4]

 

outside

m3/h

2.1[1.8]

2.6[2.2]

3.4[3.1]

4.1[3.7]

Performance Cooing

Cooing output

at W20/W7(3)

kW

9.2

12

15

18

Power consumption

 

kW

1.65

2.1

2.6

3.2

Performance factor

 

 

5.58

5.71

5.77

5.63

Volume flow

inside

m3/h

1.58

2.1

2.58

3.1

 

outside

m3/h

2.1

2.6

3.4

4.1

Power

Type

Single phase

Single phase

Triple phase

Triple phase

Sound power level

dB(A)

46

47

48

48
(1)B0/W35=Brine water inlet temperature 0°C,heating flow 35°C (2)W10/W35=Well water inlet temperature 10°C,heating flow 35°C (3)W20/W7=Outside water inlet temperature 20°C,cooling flow 7°C
     

Downloads

Click to download

 

Technical data sheet

Installation manual

Operation manual

 

 

 

Our heat pumps are manufactured in China by the HISEER group, specialists in air conditioning and refrigeration systems for many years. Designed to European specification HISEER heat pumps feature componants supplied by leading brand names, HITACHI compressors, WILO water pumps, HONEYWELLmulti way valves and thermal relays by SCHNEIDER.

 

All products are manufactured to current EEC, CE regulations, ISO 9001 standards, and carry a two year guarantee.

  

Heat pump with cooling

Type

20KW

26KW

30KW

Dimensions,weights,connection dimensions

Dimensions

HxWxD

1000x800X600 mm

Weight

kg

180

195

210

Refrigerant

Type

R407C

Filling weight

kg

4

4.5

5

Permissible operating pressure

Mpa

3

3

3

Pipe connector-hot side

Inch

G11/4"

G11/4"

G11/4"

Pipe connector-cold side

Inch

G11/4"

G11/4"

G11/4"

Evaporator

Type

Brazed plate heat exchanger

Condenser

Type

Brazed plate heat exchanger

Compressor

 

2xScroll

2xScroll

2xScroll

Performance Heat pump

Heat output

at B0/W35(1)

kW

20

26

30.5

Power consumption