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Record W7132923798

Influence of Climate on Open Earth-air Heat Exchanger Potential

2021· dissertation· W7132923798 on OpenAlexaffabout
Andrew Zajch

Bibliographic record

VenueTSpace · 2021
Typedissertation
Language
FieldEnergy
TopicGeothermal Energy Systems and Applications
Canadian institutionsUniversity of Toronto
FundersU.S. Department of Energy
KeywordsHeat exchangerClimate changeAir temperatureClimate modelEnergy budgetEnergy exchangeGlobal warmingWater cooling
DOInot available

Abstract

fetched live from OpenAlex

Space heating and cooling constitute significant energy demands in buildings. The interdependence between climate and heating and cooling energy usage makes this sector a prominent candidate for climate change mitigation as well as making it susceptible to climate change impacts. Earth-air heat exchangers (EAHE) have the potential to provide heated or cooled air to buildings by allowing for heat exchange between the subsurface and supplied ambient air, hypothetically reducing energy demands for space heating and cooling. However, the system is naturally tied to the climate as it relies on both air and subsurface ground temperatures. Therefore, to ¬recognize the feasibility of these systems and their capacity for becoming tools for climate change mitigation, the influence of climate on these systems require further understanding. The influence of seasonal variations in air and subsurface temperatures were gauged for Canadian climates to understand the impacts of assuming temporal homogenous ground or typical weather conditions. Heating potential was less dependent on the timing of seasonal variations when compared to cooling potential, with ground temperature changes exhibiting a heightened effect. This emphasized the importance of parameterizing temporally heterogenous ground surface conditions for estimates of EAHE potential. The importance of daily air temperature behavior was investigated through the temporal decomposition of surveyed air and ground temperatures from an EAHE system employed in Aichi, Japan. The reliance of cooling on the diurnal variations in air temperature implied EAHE cooling may be susceptible to increases in overnight/morning temperatures when system cooling is least favorable. Finally, ‘future’ EAHE potential was estimated by pairing a climate driven approach with climate change scenarios. Projections of geo-climatic suitability showed EAHE systems can continue to be useful in temperate climates, with a more balanced heating and cooling demand, despite an evolving heating and cooling regime. Further work should endeavor to incorporate the climate influences highlighted in this work to create a comprehensive climate-based approach for estimating EAHE. Ultimately, stakeholders looking to harness the benefits of EAHE systems should consider climate effects, avoiding oversimplifications, when estimating EAHE feasibility for present and future conditions.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow), Insufficient payload (model declined to judge)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.867
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0010.000
Bibliometrics0.0000.001
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.000
Research integrity0.0010.000
Insufficient payload (model declined to judge)0.0020.001

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.015
GPT teacher head0.307
Teacher spread0.292 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

Study designSimulation or modeling
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations0
Published2021
Admission routes2
Has abstractyes

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