A Color Box. Lost in Translation

It was that time again. The Chief Engineer had rebuilt the technical room from scratch. Each piece of heavy equipment had a new place, each pipe and wire was reborn in a new incarnation (German stories here.) The control system was turned upset down as well, and thus the Data Kraken was looking at its … Continue reading A Color Box. Lost in Translation

Data for the Heat Pump System: Heating Season 2016-2017

I update the documentation of measurement data [PDF] about twice a year. This post is to provide a quick overview for the past season. The PDF also contains the technical configuration and sizing data. Based on typical questions from an 'international audience' I add a summary here plus some 'cultural' context: Building: The house is … Continue reading Data for the Heat Pump System: Heating Season 2016-2017

Mr. Bubble Was Confused. A Cliffhanger.

This year we experienced a record-breaking January in Austria - the coldest since 30 years. Our heat pump system produced 14m3 of ice in the underground tank. The volume of ice is measured by Mr. Bubble, the winner of The Ultimate Level Sensor Casting Show run by the Chief Engineer last year: The classic, analog … Continue reading Mr. Bubble Was Confused. A Cliffhanger.

Where to Find What?

I have confessed on this blog that I have Mr. Monk DVDs for a reason. We like to categorize, tag, painstakingly re-organize, and re-use. This is reflected in our Innovations in Agriculture ... ... as well as in my periodical Raking The Virtual Zen Garden: Updating collections of web resources, especially those related to the … Continue reading Where to Find What?

Earth, Air, Water, and Ice.

In my attempts at Ice Storage Heat Source popularization I have been facing one big challenge: How can you - succinctly, using pictures - answer questions like: How much energy does the collector harvest? or What's the contribution of ground? or Why do you need a collector if the monthly performance factor just drops a … Continue reading Earth, Air, Water, and Ice.

My Data Kraken – a Shapeshifter

I wonder if Data Kraken is only used by German speakers who translate our hackneyed Datenkrake - is it a word like eigenvector? Anyway, I need this animal metaphor, despite this post is not about facebook or Google. It's about my personal Data Kraken - which is a true shapeshifter like all octopuses are. (Because … Continue reading My Data Kraken – a Shapeshifter

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

Hacking My Heat Pump – Part 2: Logging Energy Values

In the last post, I showed how to use Raspberry Pi as CAN bus logger - using a test bus connected to control unit UVR1611. Now I have connected it to my heat pump's bus. Credits for software and instructions: juerg5524.ch messpunkt.org SK Pang Special thanks to SK Pang Electronics who provided me with CAN … Continue reading Hacking My Heat Pump – Part 2: Logging Energy Values

Hacking My Heat Pump – Part 1: CAN Bus Testing with UVR1611

In the old times, measuring data manually sometimes meant braving the elements: Now, nearly all measurements are automated: In order to calculate the seasonal performance factor of the heat pump system we have still used the 'official' energy reading provided by the heat pump's display. Can't this be automated, too? Our Stiebel-Eltron WPF7 basic is … Continue reading Hacking My Heat Pump – Part 1: CAN Bus Testing with UVR1611

Alien Energy

I am sure it protects us not only from lightning but also from alien attacks and EMP guns ... So I wrote about our lightning protection, installed together with our photovoltaic generator. Now our PV generator is operational for 11 months and we have encountered one alien attack, albeit by beneficial aliens. The Sunny Baseline … Continue reading Alien Energy

Temperature Waves and Geothermal Energy

Nearly all of renewable energy exploited today is, in a sense, solar energy. Photovoltaic cells convert solar radiation into electricity, solar thermal collectors heat hot water. Plants need solar power for photosynthesis, for 'creating biomass'. The motion of water and air is influenced by the forces caused by the earth's rotation, but by temperature gradients … Continue reading Temperature Waves and Geothermal Energy

Half a Year of Solar Power and Smart Metering

Our PV generator and new metering setup is now operational for half a year; this is my next wall of figures. For the first time I am combining data from all our loggers (PV inverter, smart meter for consumption, and heat pump system's monitoring), and I give a summary on our scrutinizing the building's electrical … Continue reading Half a Year of Solar Power and Smart Metering

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 Power: Some Data for the First Month.

On May 4, 2015, we started up our photovoltaic generator. Here are some numbers and plots for the first month - and what I plan to do next. Our generator has a rated power of 4,77 kWp (kilowatt peak), one module has 265 Wp. The generator would deliver 4,77 kW of electrical power under so-called … Continue reading Solar Power: Some Data for the First Month.

How to Evaluate a Heat Pump’s Performance?

The straight-forward way is to read off two energy values at the end of a period - day, month, or season: The electrical energy used by the heat pump and the heating energy delivered. The Seasonal Performance Factor (SPF) is the ratio of these - the factor the input electrical energy is 'multiplied with' to … Continue reading How to Evaluate a Heat Pump’s Performance?

Data Logging with UVR1611 – FAQ

I have received several questions related to my article on data logging on this blog, or to my postings on monitoring and control on our German blog. Thusย I have decided to write the article I would have wanted to read when I once made myself familiar with this. The target audience for this article are … Continue reading Data Logging with UVR1611 – FAQ