The Heat Source Paradox

It is not a paradox - it is a straight-forward relation between a heat pump system's key data: The lower a heat pump's performance factor is, the smaller the source can be built. I would not write this post, hadn't I found a version of this statement with a positive twistย  used in an advert! … Continue reading The Heat Source Paradox

Same Procedure as Every Autumn: New Data for the Heat Pump System

October - time for updating documentation of the heat pump system again! Consolidated data are available in this PDF document. In the last season there were no special experiments - like last year's Ice Storage Challenge or using the wood stove. Winter was rather mild, so we needed only ~16.700kWh for space heating plus hot … Continue reading Same Procedure as Every Autumn: New Data for the Heat Pump System

Heat Pump System Data: Three Seasons 2012 – 2015

We have updated the documentation of monthly and seasonal measurement data - now including also the full season September 2014 to August 2015. The overall Seasonal Performance Factor was 4,4 - despite the slightly lower numbers in February and March, when was the solar collector was off during the Ice Storage Challenge. Edit: I have … Continue reading Heat Pump System Data: Three Seasons 2012 – 2015

Solar Energy, Batteries, and Autonomy

This is the third post in my series on our photovoltaic generator. It had been a part of previous post with the data for the first month, but I cut and saved it as the other post was so long already. I am now also able to present data for two months of operations: Below … Continue reading Solar Energy, Batteries, and Autonomy

We Have Come a Long Way: Rooftop Solar Power Now!

We had considered it already a few years ago - when we decided to live and work in the middle of a dusty and noisy construction site for a few months: The upper part of the roof is inclined by 30ยฐ - which is the optimum angle for photovoltaic panels - whereas the windows in … Continue reading We Have Come a Long Way: Rooftop Solar Power Now!