{"id":"6dc44b11-4c05-445a-97cb-707d413d15bc","arxiv_id":"2502.08553","paper_version":1,"verdict":"REJECT","confidence":"HIGH","novelty_score":0.0,"correctness_risk":"high","formal_verification":"none","parameter_count":0,"one_line_summary":"A review of EAHE literature that summarizes known studies and standard equations, but contains no new results and includes many unrelated self-citations.","lead":"This paper is a literature review that sorts Earth-to-Air Heat Exchanger studies into analytical, numerical, and exergoeconomic categories, but it adds no new measurements or models. It is crippled by misattributed citations and a block of references about unrelated topics.","discovery_kind":"review","skeptic_critique":{"model":"deepseek-v4-flash","headline":"The review's central claim of a systematic EAHE synthesis is undermined because §2.2 embeds a large block of references unrelated to Earth-to-Air Heat Exchangers.","rationale":"The reader's weakest assumption was that the literature search is systematic and that the cited references are relevant to EAHE research. The manuscript's internal evidence confirms this assumption is violated: the numerical studies subsection contains a long series of references whose topics have no connection to EAHE systems, and no search methodology is presented. The central claim of the paper, that it is a comprehensive and systematic review of EAHE analytical, numerical, and exergoeconomic research, is therefore unsupported by the paper's own content. This is the load-bearing concern because the entire contribution of a review paper rests on the relevance and completeness of its literature base; once that base is shown to include many unrelated references, the synthesis cannot be considered either systematic or comprehensive. The proposed audit would settle the matter definitively by quantifying the number of irrelevant references and checking whether the reviewed set matches the actual EAHE literature. Since my analysis confirms the reader's verdict, no change to the rejection is needed.","tokens_in":9165,"tokens_out":2082,"duration_ms":23873,"concrete_test":"Perform a reference-level relevance audit: for each of references [1]–[46], inspect the title, abstract, and venue, and classify it as either 'EAHE-core' (directly about Earth-to-Air Heat Exchangers or their exergy/exergoeconomics) or 'non-EAHE.' Count the non-EAHE entries within the block [28]–[46]. If more than one of these nineteen references qualifies as EAHE-core, the numerical-studies section is not a faithful synthesis of EAHE literature. In addition, run a targeted Scopus or Web of Science query for 'earth-to-air heat exchanger' and compare the retrieved set of core papers with the reviewed list; if a substantial fraction of the retrieved core literature is absent while many non-EAHE items are included, the comprehensiveness claim fails.","verdict_should_be":"UNCHANGED","load_bearing_attack":"The paper's central claim is that it 'systematically categorizes and synthesizes research on EAHEs into three primary areas: analytical, numerical, and exergoeconomic studies.' For that claim to hold, the cited literature must actually be about EAHEs and the search must be systematic. The manuscript itself provides direct internal evidence against both conditions. In §2.2, titled 'Numerical Studies,' references [28] through [46] are presented as if they belong in a review of EAHE numerical work, but most of them concern unrelated topics: media advertising [28], OECD energy-growth analysis [29], stormwater digital twins [30], diesel engine NOx emissions [31], groundwater remediation [32], coastal terrain segmentation [33], reverse logistics [34], concrete crack detection [35], storm sewer geysers [36], extreme hydrometeorological events in Bangladesh [37], airport security queues [40], meteorological drought forecasting [41,42], road construction value engineering [43], project management quality [44], and sewer filling/emptying simulations [45,46]. Only [38] is directly relevant to a ground-to-air heat exchanger system. Furthermore, §3, labeled 'Methodology,' contains only standard exergy equations and does not describe any search protocol, databases consulted, inclusion criteria, or screening procedure. A review's comprehensiveness cannot be verified, and is in fact contradicted, when its own reference list is dominated by off-topic items. This is not a matter of disagreement with consensus; it is a failure of the paper's stated scope. The absence of a systematic literature base means the synthesis of analytical, numerical, and exergoeconomic EAHE research is unsupported by the manuscript's own contents.","agreement_with_reader":"agree"},"referee_report":{"model":"deepseek-v4-flash","summary":"This manuscript presents itself as a comprehensive, systematic review of research on Earth-to-Air Heat Exchangers (EAHEs), organized into three categories: analytical studies, numerical studies, and exergoeconomic analyses. It summarizes a small set of EAHE papers (primarily from the 1990s through 2011, plus a few later items), provides standard exergy balance equations, and concludes that EAHEs are a promising sustainable technology. The abstract and title explicitly claim systematic categorization and synthesis.","tokens_in":9435,"tokens_out":2571,"duration_ms":26201,"significance":"If the paper's claims were reliable, it could serve as a useful entry point for researchers and policymakers interested in EAHEs. The paper does provide a handful of correct summaries of genuine EAHE studies (e.g., the Ozgener and Ozgener exergy analyses, Al-Ajmi et al., Bansal et al.) and reproduces well-known exergy balance equations. However, the review's own reference list and internal text contradict the core claim of systematic and comprehensive coverage. No search methodology is described, and large portions of the 'numerical studies' section are devoted to works on storm sewers, drought forecasting, airport security queues, media advertising, and other unrelated topics. The numerous author-name and citation errors further undermine the paper's reliability as a reference. The paper makes no original technical contribution and contains no derivations; its value, if any, would rest entirely on the accuracy and completeness of its literature synthesis, and that synthesis is not dependable.","major_comments":[{"comment":"The central claim of the paper—that it 'systematically categorizes and synthesizes research on EAHEs'—is directly undermined by the content of §2.2. The paragraph presents references [28] through [46] as part of a review of numerical EAHE studies, but the majority of these references concern unrelated topics: media advertising [28], OECD energy-growth analysis [29], stormwater digital twins [30], diesel engine NOx emissions [31], groundwater remediation [32], coastal terrain segmentation [33], reverse logistics [34], concrete crack detection [35], storm sewer geysers [36], hydrometeorological extremes in Bangladesh [37], airport security queues [40], meteorological drought forecasting [41,42], road construction value engineering [43], project management quality [44], and sewer filling/emptying simulations [45,46]. Only [38] is directly about a ground-to-air heat exchanger. Because the claimed comprehensiveness is the paper's main contribution, this is not a minor editorial lapse; it is a load-bearing deficiency that invalidates the numerical-studies component of the review.","section":"§2.2 (Numerical Studies), references [28]–[46]"},{"comment":"The section labeled 'Methodology' contains only standard exergy balance equations (Eqs. 1–8) and does not describe any systematic review method. There is no statement of databases searched, search terms, inclusion/exclusion criteria, screening procedure, or synthesis method. Without such information, the paper's assertion of being a 'systematic' review cannot be verified, and the presence of a large block of off-topic references (§2.2) indicates that no effective screening was performed. For a review paper, the methodology is the foundation of the central claim; its absence is a major flaw.","section":"§3 (Methodology)"},{"comment":"Several in-text attributions do not match the corresponding reference entries. In §2.1, 'Karate and Kreider (1995)' corresponds to reference [12], which is 'Krarti and Kreider'; 'Kokomo et al. (2008)' corresponds to reference [15], which is 'Cucumo et al.'; and in §2.2, 'Chau and Tiwari (2009)' corresponds to reference [19], which is 'Chel and Tiwari'. These are not mere typographical slips in the reference list; they appear in the body text as the names of the cited authors, so a reader relying on the review would be misled about the literature. This level of inaccuracy is incompatible with the paper's stated purpose as a comprehensive reference.","section":"§2.1 and §2.2 (author/citation accuracy)"},{"comment":"While the summaries of the Ozgener and Ozgener studies and the Yildiz et al. study are topically relevant, the section does not provide a critical synthesis or any comparative assessment of the reported COP and exergetic efficiency values across different climates and system configurations. The paper's conclusion draws broad claims about 'robust evidence of cost-effectiveness' without quantitative support from the reviewed studies. This weakens the 'exergoeconomic evaluations' component of the claimed tripartite synthesis.","section":"§4 (Studies on Exergy Analysis)"}],"minor_comments":[{"comment":"References [6] through [10] (Lienau, Lund, Kavanaugh, Rafferty) are listed but are never cited in the body text; the narrative jumps from [5] to [11]. The authors should either cite these sources where relevant or remove them.","section":"General / References"},{"comment":"The text states 'Figure 1 illustrates the two primary configurations of EAHE systems,' but the manuscript as provided contains only a figure caption placeholder; no actual figure appears. If the figure is missing, it should be included or the reference should be removed.","section":"Figure 1"},{"comment":"The equations presented are standard exergy-balance and efficiency relations, but the citation 'reference [22–25]' is imprecise: reference [22] is a CFD study, and [23]–[25] are Ozgener and Ozgener papers. The authors should cite the specific sources from which each equation is drawn and clarify the notation (e.g., define all symbols such as ψ, ε₁, ε₂, ε₃, T₀, etc.).","section":"Equations 1–8"},{"comment":"The title promises a 'Comprehensive Review,' but the corpus covered is small and heavily skewed toward a narrow time window (1992–2013 for substantive EAHE studies) with a few 2024 entries that are not about EAHEs. The abstract's claim of serving as 'a comprehensive reference for researchers, engineers, and policymakers' should be tempered to match the actual scope.","section":"Title and Abstract"},{"comment":"Even if the off-topic references were removed, the remaining reference list contains inconsistent formatting: incomplete author lists, missing DOIs, and two different citation styles (numbered and author–date). A uniform style should be applied.","section":"References [28]–[46]"}],"recommendation":"reject","confidential_remarks":"This manuscript appears to be a compilation of summaries of a small number of genuine EAHE papers embedded in a much larger block of unrelated citations. The internal evidence—off-topic references placed in a section on numerical EAHE studies, the absence of any search protocol, and the incorrect attributions of cited works—makes the paper unsuitable for publication in its present form. The central claim of systematic and comprehensive synthesis is not merely overstated; it is contradicted by the manuscript's own content. Given the scope of the problem, I do not think a revision within the normal review cycle could repair the foundational deficiencies; a complete rewrite with a genuine systematic methodology and a verifiable reference set would be needed."},"author_rebuttal":null,"desk_editor":{"model":"deepseek-v4-flash","letter":"Quick take: this review does not do what it claims. The title and abstract promise a systematic synthesis of EAHE research, but the manuscript's own reference list contradicts that: §2.2 embeds a block of about fifteen references on advertising, storm sewers, drought forecasting, airport queues, and road construction, none of which belong in a review of earth-to-air heat exchangers. That is not a stylistic quibble; it breaks the central claim.\n\nWhat the paper does do okay: the first part of the literature review covers the classic analytical and numerical EAHE studies (Tzaferis, Krarti, De Paepe, Al-Ajmi, Bansal, Ascione, etc.), and the exergy section accurately summarizes Ozgener and Yildiz's results. If you already know the field, reading this paper reminds you of those papers; a newcomer would get a partial, uneven introduction. The equations in §3 are standard exergy balances and Carnot COP relations, correctly stated.\n\nSoft spots beyond the off-topic block: author names are mangled (Krarti becomes 'Karate', Cucumo becomes 'Kokomo', Chel becomes 'Chau'), one attribution is shifted (text says 'Chau and Tiwari' for what is reference [19], Chel and Tiwari), and the 'Methodology' section describes no search protocol, databases, inclusion criteria, or screening procedure. For a review claiming comprehensiveness, that is a missing methods section, not a minor omission. The manuscript's own internal evidence is the strongest problem: the bulk of references [28]–[46] are unrelated to EAHEs, which suggests the authors appended recent papers by their group without integrating them. That undercuts any confidence in the accuracy of the rest of the citation base.\n\nThe stress-test note holds. The paper is not a research contribution (no new results), and as a review it fails basic standards of accuracy and scope. It would need a complete rewrite with a real search protocol and a cleaned reference list before it could be useful.\n\nWho this is for: maybe a reader who wants a quick list of some older EAHE papers and the Ozgener exergoeconomic results. That value is real but small and already available in better reviews, e.g., Ozgener's own 2011 review in RSER.\n\nRecommendation: do not send to peer review. This is a desk reject. It is not salvageable by minor revision.","headline":"The paper's central claim of a systematic review is contradicted by its own reference list, which contains a large block of unrelated papers; the rest is a thin, error-prone summary.","tokens_in":9999,"tokens_out":1835,"would_cite":false,"duration_ms":18023,"reading_group":"no","serious_thinker":"no","would_accept_peer_review":false},"rs_alignment":null,"lean_confirmation":null,"pith_extraction":{"msc":[],"pacs":[],"model":"deepseek-v4-flash","headline":"This review paper claims that Earth-to-Air Heat Exchanger (EAHE) research is mature enough to be organized into analytical, numerical, and exergoeconomic streams, and that this synthesis supports their adoption for low-energy…","keywords":["Earth-to-Air Heat Exchanger","Exergy Analysis","Passive Cooling","Exergoeconomics","Numerical Simulation","Underground air ducts","HVAC energy efficiency","Greenhouse cooling"],"falsifier":"Run a structured query for 'earth-to-air heat exchanger' or 'underground air duct' across engineering databases and compare the results with the review's citation list; if a large share of the cited works concern storm sewers, drought forecasting, or advertising rather than EAHEs, the claimed comprehensive synthesis fails.","tokens_in":8957,"feed_emoji":"🌱","tokens_out":7634,"duration_ms":77230,"temperature":0.7,"pith_summary":"This paper is a review rather than a new experimental study. Its goal is to show that the scattered research on Earth-to-Air Heat Exchangers (EAHEs) — buried ducts that use the ground's stable temperature to pre-cool or pre-heat ventilation air — can be organized into three coherent streams: analytical models, numerical simulations, and exergoeconomic assessments that combine thermodynamic efficiency with cost. The authors argue that viewing these streams together makes a stronger case for EAHEs than any single study, because analytical results give design formulas, simulations add real-world optimization, and exergoeconomics shows when the technology pays for itself. If the synthesis holds, it gives engineers and policymakers a single reference for choosing system dimensions, burial depths, and hybrid renewable configurations.","feed_headline":"Review groups Earth-to-Air heat exchanger research into three streams","feed_subtitle":"Analytical, numerical, and exergoeconomic studies get one unified reference for designing low-energy underground cooling.","key_machinery":"The central organizing device is the three-category taxonomy: analytical studies, numerical studies, and exergoeconomic studies. The mathematical machinery supplied to hold the taxonomy together is the exergy balance, written as $\\dot{Ex}_{in} - \\dot{Ex}_{out} = \\dot{Ex}_{dest}$, with irreversibility $I = \\dot{Ex}_{dest} = T_0 \\dot{S}_{gen}$ and the efficiency definitions $\\varepsilon_1 = \\dot{Ex}_{out}/\\dot{Ex}_{in}$ and the product-to-fuel ratio version. These equations give the exergoeconomic stream a common language for comparing systems across different climates and configurations.","core_discovery":"On its own terms, the paper's central claim is that the EAHE literature, including work back to the early 1990s, is mature enough to be grouped under three headings, each with a distinct question. Analytical studies ask how outlet air temperature and thermal efficiency depend on duct length, diameter, depth, and airflow; numerical studies ask how a particular configuration performs under realistic soil, climate, and building conditions; exergoeconomic studies ask whether the energy saved justifies the installation and operating cost. The paper presents the key equations—an exergy balance, exergy destruction proportional to entropy generation, and three exergetic efficiency definitions—as the common analytical machinery, and it reports representative findings from the cited literature, such as a roughly 30% cooling-energy reduction in a Kuwait residential simulation, recommended burial depths near 3 m, and exergoeconomic COPs above 10 in greenhouse applications. The intended outcome is that future researchers can position new work within one of the three streams and use the consolidated evidence to justify EAHE adoption.","pith_inferences":["Editorial extension: the same analytical/numerical/exergoeconomic taxonomy could be applied to other passive-cooling technologies—wind towers, ground-source heat pumps, solar chimneys—to make cross-technology comparisons on a common footing.","Editorial extension: the exergy-balance equations and efficiency definitions in Section 3 could be turned into a standardized reporting template, so that new EAHE studies report exergy destruction and exergetic efficiency in comparable units.","Editorial extension: the comprehensiveness claim is directly testable by re-running the categorization on a structured database search; if a formal search protocol is added, the review could be updated into a genuinely reproducible scoping review."],"forward_implications":["If the classification is adopted, new EAHE papers could be labeled by stream, making it easier to compare analytical design charts with numerical results and field data.","The cited findings—30% cooling savings in desert homes, optimal burial depth around 3 m, and COP values sometimes exceeding 10 in greenhouses—would give designers concrete starting values before site-specific simulation.","The exergoeconomic evidence, if correct, strengthens the case for pairing EAHEs with photovoltaic panels or heat pumps rather than relying on grid-powered HVAC during peak hours.","The paper's key challenges list, covering soil thermal conductivity, moisture effects, and renewable integration, would define the next research agenda for the field."],"supporting_citations":[{"why":"Supplies the eight-model accuracy comparison that defines the analytical stream and its sensitivity factors.","marker":"[11]"},{"why":"Provides the analytical model predicting 24-hour outlet temperature variations, a core example of the analytical category.","marker":"[12]"},{"why":"Uses the NTU method to create one-dimensional design charts for underground ducts, a tool anchor for analytical design.","marker":"[14]"},{"why":"Reports a residential simulation in Kuwait that cuts cooling-season energy use by about 30%, a representative numerical result.","marker":"[16]"},{"why":"Gives a parametric numerical study across Italian climates, recommending duct lengths of 10-50 m and burial depth near 3 m.","marker":"[21]"},{"why":"Introduces the derating factor concept for transient thermal efficiency in a computational fluid dynamics analysis.","marker":"[22]"},{"why":"Conducts an exergy analysis of a real EAHE and reports an average COP of 4.74, anchoring the exergoeconomic stream.","marker":"[23]"},{"why":"Supplies the exergoeconomic analysis with exergy destruction range 0.26-2.5 kW and 56.9% product-to-fuel efficiency.","marker":"[24]"},{"why":"Demonstrates a photovoltaic-assisted EAHE system for greenhouse cooling, supporting the hybrid-renewable claim.","marker":"[27]"}],"fun_headline_variants":["EAHE review: three streams—analytical, numerical, exergoeconomic","Earth-to-Air heat exchanger review: three research streams","Three lenses on Earth-to-Air heat exchanger research","Review splits EAHE research into analytical, numerical, exergoeconomic","EAHE research: analytical, numerical, exergoeconomic"],"cache_read_input_tokens":3200,"weakest_assumption_plain":"The load-bearing premise is that the review is built on a systematic and on-topic literature search; if that premise fails, the claimed comprehensiveness of the synthesis collapses.","fun_headline_variants_meta":{"raw":{"variants":["EAHE review: three streams—analytical, numerical, exergoeconomic","Earth-to-Air heat exchanger review: three research streams","Three lenses on Earth-to-Air heat exchanger research","Review splits EAHE research into analytical, numerical, exergoeconomic","EAHE research: analytical, numerical, exergoeconomic"]},"model":"deepseek-v4-flash","effort":"low","cost_usd":0.000771,"raw_usage":{"total_tokens":3448,"prompt_tokens":1016,"completion_tokens":2432,"prompt_tokens_details":{"cached_tokens":384},"prompt_cache_hit_tokens":384,"prompt_cache_miss_tokens":632,"completion_tokens_details":{"reasoning_tokens":2343}},"tokens_in":632,"tokens_out":2432,"duration_ms":20003,"temperature":1.0,"reasoning_tokens":2343,"cache_read_input_tokens":384,"cache_creation_input_tokens":0},"cache_creation_input_tokens":0},"created_at":"2026-08-08T04:38:08.900870+00:00","model_set":{"reader":"deepseek-v4-flash"},"falsifier":"Run a structured query for 'earth-to-air heat exchanger' or 'underground air duct' across engineering databases and compare the results with the review's citation list; if a large share of the cited works concern storm sewers, drought forecasting, or advertising rather than EAHEs, the claimed comprehensive synthesis fails.","supporting_citations":[{"cited_title":"Analysis of the accuracy and sensitivity of eight models predict the performance of Earth-to-Air Heat Exchanger","cited_arxiv_id":null,"evidence_quote":"Supplies the eight-model accuracy comparison that defines the analytical stream and its sensitivity factors."},{"cited_title":"Analytical model for heat transfer in an underground air tunnel","cited_arxiv_id":null,"evidence_quote":"Provides the analytical model predicting 24-hour outlet temperature variations, a core example of the analytical category."},{"cited_title":"Thermo-hydraulic design of Earth-Air Heat Exchangers","cited_arxiv_id":null,"evidence_quote":"Uses the NTU method to create one-dimensional design charts for underground ducts, a tool anchor for analytical design."},{"cited_title":"The cooling potential of earth –air heat exchangers for domestic buildings in a desert climate","cited_arxiv_id":null,"evidence_quote":"Reports a residential simulation in Kuwait that cuts cooling-season energy use by about 30%, a representative numerical result."},{"cited_title":"Earth-to-air heat exchangers for Italian climates","cited_arxiv_id":null,"evidence_quote":"Gives a parametric numerical study across Italian climates, recommending duct lengths of 10-50 m and burial depth near 3 m."},{"cited_title":"‘Derating Factor’ new concept for evaluating thermal performance of earth air tunnel heat exchanger: A transient CFD analysis","cited_arxiv_id":null,"evidence_quote":"Introduces the derating factor concept for transient thermal efficiency in a computational fluid dynamics analysis."},{"cited_title":"Ozgener, L","cited_arxiv_id":null,"evidence_quote":"Conducts an exergy analysis of a real EAHE and reports an average COP of 4.74, anchoring the exergoeconomic stream."},{"cited_title":"Ozgener, L","cited_arxiv_id":null,"evidence_quote":"Supplies the exergoeconomic analysis with exergy destruction range 0.26-2.5 kW and 56.9% product-to-fuel efficiency."},{"cited_title":"Yildiz, O","cited_arxiv_id":null,"evidence_quote":"Demonstrates a photovoltaic-assisted EAHE system for greenhouse cooling, supporting the hybrid-renewable claim."}],"review_version":1}