An eerie soundtrack for crime stories

Inspired by Derrick, Debussy, old cartoons, surrealism…and Lovecraft. I’ve recorded a soundtrack for the novelist Fabrizio Borgio’s crime stories, which are settled amongst the foggy vineyards of North-Western Italy.

Martinengo’s Waltz by Quantum Prana | Free Listening on SoundCloud

Demogorgon, a new song.

“Ήτοι μεν πρώτιστα χάος γένετο.” (“Verily at the first Chaos came to be.”)
Hesiod (ca.750 BC), Theogonia, 116.

The opening tune of my dark progressive album “Quantum Arkanum”, featuring stoner, sludge and psychedelic elements, with some classical flavour.

Quantum Prana: guitars, bass, voices, drum programming, mixing & mastering.

Cover illustration by Gustave Doré (1832-1883).

New paper on energy data mining now published

Office Building Tenants’ Electricity Use Model for Building Performance Simulations
https://www.mdpi.com/1996-1073/13/21/5541

Abstract

Large office buildings are responsible for a substantial portion of energy consumption in urban districts. However, thorough assessments regarding the Nordic countries are still lacking. In this paper we analyse the largest dataset to date for a Nordic office building, by considering a case study located in Stockholm, Sweden, that is occupied by nearly a thousand employees. Distinguishing the lighting and occupants’ appliances energy use from heating and cooling, we can estimate the impact of occupancy without any schedule data. A standard frequentist analysis is compared with Bayesian inference, and the according regression formulas are listed in tables that are easy to implement into building performance simulations (BPS). Monthly as well as seasonal correlations are addressed, showing the critical importance of occupancy. A simple method, grounded on the power drain measurements aimed at generating boundary conditions for the BPS, is also introduced; it shows how, for this type of data and number of occupants, no more complexities are needed in order to obtain reliable predictions. For an average year, we overestimate the measured cumulative consumption by only 4.7%. The model can be easily generalised to a variety of datasets.
Keywords: building simulationoffice buildingsenergy performanceenergy modellingHVACanalytical modellingstatistical analysis

New paper on geothermal energy published

Our latest paper introduces a tabulated tool that aids in the early design of geothermal systems, by providing estimates of the system’s efficiency according to the chosen energy piles field configuration and heat pump sizing.

Direct link: https://doi.org/10.1016/j.enbuild.2020.110178

The paper can be downloaded FOR FREE for 50 days at this link:
https://www.sciencedirect.com/science/article/pii/S037877882031152X?dgcid=author

Abstract

Geothermal systems are often employed for both the heating and cooling of sustainable constructions. Energy piles (U-shaped heat exchangers inserted into the foundation piles) are widely included in these installations, whose performance is usually estimated by means of complex, time-consuming simulations already at an early design stage.
Here we propose a simple methodology, where a hand calculation tool provides the condenser yield per pile meter, ground area yield and demand covered by the heat pump by specifying only building heat load and geometric characteristics of the energy piles field. Our tool is tested by assuming 20 years of operation in a hall-type commercial building in a cold climate. A validated IDA-ICE parametric study couples the heat pump evaporator operation with heat transfer processes between energy piles and soil. Various system configurations are considered and thermal storage in the soil is included.
We find that the expected yield is not directly proportional to pile separation, while a smaller extraction power is favoured. Thermal storage in the soil is also confirmed to be critical. Besides our specific quantitative results, our practical guideline is qualitatively general and can be extended to any given building type and climate.

Full cover album released with Echoes From A Great Distance

So here is Echoes From A Great Distance (where I play bass) covering the magnificent One Hundred Years by The Cure.
https://soundcloud.com/echoesfro…/one-hundred-years-the-cure .
We have just released a full cover album, featuring Bauhaus, Midnight Oil, The Mission, Pere Ubu, Diaframma and Franti. Check it out on the band’s Soundcloud!

New lyrics video – Sabbatical Leave

I have published a lyrics video for the radio edit version of my song Sabbatical Leave. You can watch it below or on Youtube at https://www.youtube.com/watch?v=z1mfO0uZ7co

The full version of the track is on my Soundcloud profile at https://soundcloud.com/quantumprana/sabbatical-leave

New paper published: “A novel method for calculating heat emitter and controller configuration setpoint variations with EN15316-2”.

We published a new article! Highlights of the paper, available at https://doi.org/10.1016/j.jobe.2020.101387:

  • A novel method for the accurate calculation of total setpoint variations.
  • Effects of real system losses are better represented than with component assessment
  • Simulations of annual energy consumption compare losses for new and old building.
  • A common platform to compare emission efficiency under standardised conditions.

Abstract:
Estimating heat emission losses of heating systems is an important task of energy efficiency assessments in buildings. However, the present international standards do not specify how emission losses should be calculated or measured for different emitter and control system configurations. Aiming to fill this gap, here we propose a method for computing the temperature setpoint variations by addressing the heat distribution throughout a room with space heat emitters. This general and exact procedure enables the calculation of product category-specific setpoint variations for different types of heat emitters, accounting for the overall heat balance in the enclosure and including the cross-correlations of each component. Our method complements the procedure presented in the Standard EN15316-2, making it possible to compute emission losses as product-specific values of setpoint variations instead of tabulated values. As the main finding of the study, the calculation process is defined for a European Reference Room that allows an accurate and transparent evaluation of total setpoint variations. These are computed for specific products from measured vertical stratification and control parameters, by means of an annual IDA ICE simulation model of the reference enclosure. Applying the method to an annual energy performance simulation for an old and a new building in Strasbourg shows that emission losses are compensated by a total setpoint variation of respectively up to 2.00 °C and 1.20 °C, corresponding to an increase in total heating energy usage of up to 22% and 20%.