Output of ground pumps at different temperatures

[Andrew]

Hi

Is there a forum location that has discussed this please?   I need to know the efficiency of a pump for different supply and input water temperatures.

What are the pumps capable of?   When selecting a pump does the manufacturer give you all the information you need?

Is it a science or trial and error and hope for the best??

Which manufacturers pumps are best suited for providing high temperatures for radiators, for curve of 42 @ 0, 59 @ -20?

Sorry. So many questions and i just dont know where to get the answers via the web.  Manufacturers dont seem to supply much information?   Eg Cop graphs for different temperatures?

Thanks

Andrew

[hoohöö]

Not sure how much you can trust on wikipedia but there's told like this;
COP is 2.4 at output temp. of +65 and 2.9 at +55

See COP and lift table;
http://en.wikipedia.org/wiki/Heat_pump#cite_note-CREN-1

[tomppeli]

From this page you can get a collection of all pumps and data.

http://www.maalampofoorumi.fi/index.php?topic=64.0

Klick there red text ---> "luettelo Suomessa myytävistä maalämpöpumpuista!"

There on the bottom part of page you can select two types of pumps
1. "varaajalla koottain" ==> Pumps with thermal accu (Thermal accu inside in pump cabinet)
2. "varaajatta koottain" ==>Pums without thermal accu (= Separate heat tank outside of pump cabinet)

[Andrew]

From this page you can get a collection of all pumps and data.

http://www.maalampofoorumi.fi/index.php?topic=64.0

Klick there red text ---> "luettelo Suomessa myytävistä maalämpöpumpuista!"

There on the bottom part of page you can select two types of pumps
1. "varaajalla koottain" ==> Pumps with thermal accu (Thermal accu inside in pump cabinet)
2. "varaajatta koottain" ==>Pums without thermal accu (= Separate heat tank outside of pump cabinet)

Thanks thats a great selection! 

[hoohöö]

Hello,

fyi, there is inverter pumps at least nibe 1150 and IVT X15; advantage of inverter pump is that it can adjust power of pump based on actual need; for example nibe 1150 output power at 0/+45  can variate from 3.9kw to 15.8kw (without resistances).

http://www.nibeonline.com/pdf/031225-1.pdf

Max. outgoing water temp. is +65.

http://www.nibe.fi/fi/Tuotteet/Maalampopumput/Tuotevalikoima/NIBE-FIGHTER-1150/

Korkeat lämpötila-alueet:
– Maks. menolämpötila 65 °C
– Maks. paluulämpötila 56 °C

Inverter technology in heat pumps is pretty new so not known how well these work in practise and inverter pumps are also more expensive as traditional pumps, but I guess this type of pump would suite well to your house

[Andrew]

Hello,

fyi, there is inverter pumps at least nibe 1150 and IVT X15; advantage of inverter pump is that it can adjust power of pump based on actual need; for example nibe 1150 output power at 0/+45  can variate from 3.9kw to 15.8kw (without resistances).

http://www.nibeonline.com/pdf/031225-1.pdf

Max. outgoing water temp. is +65.

http://www.nibe.fi/fi/Tuotteet/Maalampopumput/Tuotevalikoima/NIBE-FIGHTER-1150/

Korkeat lämpötila-alueet:
– Maks. menolämpötila 65 °C
– Maks. paluulämpötila 56 °C

Inverter technology in heat pumps is pretty new so not known how well these work in practise and inverter pumps are also more expensive as traditional pumps, but I guess this type of pump would suite well to your house

Thanks.  Very interesting!  I just spent a few hours reading the english manual.

http://www.nibeonline.com/pdf/031223-2.pdf