ᐅ The Right Storage Solution for a Heat Pump with Photovoltaic System?
Created on: 19 Mar 2017 14:53
K
krischaaan
Hello everyone,
we are about to build our new single-family home and I would like to ask for your help...
The question is about the right storage system: whether to use a stratified storage tank with instantaneous water heating for domestic hot water, or a buffer tank/domestic hot water tank.
Also, the question about the correct sizing of the photovoltaic system.
Here are the framework conditions:
New build with 190 sqm (2050 sq ft) living area and a basement
KFW 55 (1 liter house)
Decentralized ventilation system (97% heat recovery)
Heating: Novelan LAD 9 HID 1
Combined with a photovoltaic system
No additional heat sources such as wood stove or solar thermal
My heating installer has offered me a 600 liter (160 gallons) stratified storage tank Novelan MFS 600 S.
Now I wonder if for summer operation a separate domestic hot water tank with buffer storage would be better? Since then only the domestic hot water tank would need to be heated. How large would you size these?
Would you still choose a heat pump tariff, or do you think it no longer makes sense?
Thank you very much. Christian
we are about to build our new single-family home and I would like to ask for your help...
The question is about the right storage system: whether to use a stratified storage tank with instantaneous water heating for domestic hot water, or a buffer tank/domestic hot water tank.
Also, the question about the correct sizing of the photovoltaic system.
Here are the framework conditions:
New build with 190 sqm (2050 sq ft) living area and a basement
KFW 55 (1 liter house)
Decentralized ventilation system (97% heat recovery)
Heating: Novelan LAD 9 HID 1
Combined with a photovoltaic system
No additional heat sources such as wood stove or solar thermal
My heating installer has offered me a 600 liter (160 gallons) stratified storage tank Novelan MFS 600 S.
Now I wonder if for summer operation a separate domestic hot water tank with buffer storage would be better? Since then only the domestic hot water tank would need to be heated. How large would you size these?
Would you still choose a heat pump tariff, or do you think it no longer makes sense?
Thank you very much. Christian
T
toxicmolotof29 Mar 2017 21:11Yes, a significant one. Heating rod operation for 5 minutes every day (which, given the dimensions mentioned, probably won’t be sufficient) could cost more from the grid than heating the hot water for 270 days entirely with photovoltaics.
But this really needs to be calculated. The truth definitely won’t be as black-and-white and one-sided as you describe it here.
But this really needs to be calculated. The truth definitely won’t be as black-and-white and one-sided as you describe it here.