{"id":"https://openalex.org/W4281752827","doi":"https://doi.org/10.3390/sym14061168","title":"An Enhanced Calculation Method of the Heat Rejection System of a Free-Piston Stirling Engine (FPSE) Operating on the Moon","display_name":"An Enhanced Calculation Method of the Heat Rejection System of a Free-Piston Stirling Engine (FPSE) Operating on the Moon","publication_year":2022,"publication_date":"2022-06-06","ids":{"openalex":"https://openalex.org/W4281752827","doi":"https://doi.org/10.3390/sym14061168"},"language":"en","primary_location":{"id":"doi:10.3390/sym14061168","is_oa":true,"landing_page_url":"https://doi.org/10.3390/sym14061168","pdf_url":"https://www.mdpi.com/2073-8994/14/6/1168/pdf?version=1654677215","source":{"id":"https://openalex.org/S190787756","display_name":"Symmetry","issn_l":"2073-8994","issn":["2073-8994"],"is_oa":true,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Symmetry","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://www.mdpi.com/2073-8994/14/6/1168/pdf?version=1654677215","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5102007468","display_name":"Sergey Smirnov","orcid":"https://orcid.org/0000-0002-8887-1745"},"institutions":[{"id":"https://openalex.org/I126527374","display_name":"Peoples' Friendship University of Russia","ror":"https://ror.org/02dn9h927","country_code":"RU","type":"education","lineage":["https://openalex.org/I126527374"]}],"countries":["RU"],"is_corresponding":false,"raw_author_name":"Sergey Smirnov","raw_affiliation_strings":["Academy of Engineering, Peoples\u2019 Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","Academy of Engineering, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Academy of Engineering, Peoples\u2019 Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","institution_ids":["https://openalex.org/I126527374"]},{"raw_affiliation_string":"Academy of Engineering, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","institution_ids":["https://openalex.org/I126527374"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5004929048","display_name":"\u041c. \u0412. \u0421\u0438\u043d\u043a\u0435\u0432\u0438\u0447","orcid":"https://orcid.org/0000-0003-3259-4221"},"institutions":[{"id":"https://openalex.org/I126527374","display_name":"Peoples' Friendship University of Russia","ror":"https://ror.org/02dn9h927","country_code":"RU","type":"education","lineage":["https://openalex.org/I126527374"]},{"id":"https://openalex.org/I4210158550","display_name":"Joint Institute for High Temperatures","ror":"https://ror.org/04gns8903","country_code":"RU","type":"facility","lineage":["https://openalex.org/I1313323035","https://openalex.org/I4210158550","https://openalex.org/I4210164537"]}],"countries":["RU"],"is_corresponding":false,"raw_author_name":"Mikhail Sinkevich","raw_affiliation_strings":["Academy of Engineering, Peoples\u2019 Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","Gas Turbine Technologies Laboratory, Joint Institute for High Temperatures, Russian Academy of Sciences, 13 2 Izhorskaya Str., 125412 Moscow, Russia","Academy of Engineering, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Academy of Engineering, Peoples\u2019 Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","institution_ids":["https://openalex.org/I126527374"]},{"raw_affiliation_string":"Gas Turbine Technologies Laboratory, Joint Institute for High Temperatures, Russian Academy of Sciences, 13 2 Izhorskaya Str., 125412 Moscow, Russia","institution_ids":["https://openalex.org/I4210158550"]},{"raw_affiliation_string":"Academy of Engineering, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","institution_ids":["https://openalex.org/I126527374"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5083341264","display_name":"Yu.A. Antipov","orcid":"https://orcid.org/0000-0002-5598-7522"},"institutions":[{"id":"https://openalex.org/I126527374","display_name":"Peoples' Friendship University of Russia","ror":"https://ror.org/02dn9h927","country_code":"RU","type":"education","lineage":["https://openalex.org/I126527374"]}],"countries":["RU"],"is_corresponding":false,"raw_author_name":"Yuri Antipov","raw_affiliation_strings":["Academy of Engineering, Peoples\u2019 Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","Academy of Engineering, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Academy of Engineering, Peoples\u2019 Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","institution_ids":["https://openalex.org/I126527374"]},{"raw_affiliation_string":"Academy of Engineering, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","institution_ids":["https://openalex.org/I126527374"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5069044065","display_name":"\u0418\u0433\u043e\u0440\u044c \u0413\u0435\u0440\u043c\u0430\u043d\u043e\u0432\u0438\u0447 \u0426\u0430\u0440\u044c\u043a\u043e\u0432","orcid":"https://orcid.org/0000-0002-5943-3711"},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Igor Tsarkov","raw_affiliation_strings":["Nauka Power Technology LLC, 42 1 Bolshoy Boulevard, 121205 Moscow, Russia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Nauka Power Technology LLC, 42 1 Bolshoy Boulevard, 121205 Moscow, Russia","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5010891015","display_name":"Sergei A. Kupreev","orcid":"https://orcid.org/0000-0002-8657-2282"},"institutions":[{"id":"https://openalex.org/I126527374","display_name":"Peoples' Friendship University of Russia","ror":"https://ror.org/02dn9h927","country_code":"RU","type":"education","lineage":["https://openalex.org/I126527374"]}],"countries":["RU"],"is_corresponding":false,"raw_author_name":"Sergei Kupreev","raw_affiliation_strings":["Academy of Engineering, Peoples\u2019 Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","Academy of Engineering, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Academy of Engineering, Peoples\u2019 Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","institution_ids":["https://openalex.org/I126527374"]},{"raw_affiliation_string":"Academy of Engineering, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","institution_ids":["https://openalex.org/I126527374"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5009912078","display_name":"Hassan Khalife","orcid":"https://orcid.org/0000-0002-2269-0933"},"institutions":[{"id":"https://openalex.org/I126527374","display_name":"Peoples' Friendship University of Russia","ror":"https://ror.org/02dn9h927","country_code":"RU","type":"education","lineage":["https://openalex.org/I126527374"]}],"countries":["RU"],"is_corresponding":true,"raw_author_name":"Hassan Khalife","raw_affiliation_strings":["Academy of Engineering, Peoples\u2019 Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","Nauka Power Technology LLC, 42 1 Bolshoy Boulevard, 121205 Moscow, Russia","Academy of Engineering, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia"],"raw_orcid":"https://orcid.org/0000-0002-2269-0933","affiliations":[{"raw_affiliation_string":"Academy of Engineering, Peoples\u2019 Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","institution_ids":["https://openalex.org/I126527374"]},{"raw_affiliation_string":"Nauka Power Technology LLC, 42 1 Bolshoy Boulevard, 121205 Moscow, Russia","institution_ids":[]},{"raw_affiliation_string":"Academy of Engineering, Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia","institution_ids":["https://openalex.org/I126527374"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":6,"corresponding_author_ids":["https://openalex.org/A5009912078"],"corresponding_institution_ids":["https://openalex.org/I126527374"],"apc_list":{"value":2000,"currency":"CHF","value_usd":2165},"apc_paid":{"value":2000,"currency":"CHF","value_usd":2165},"fwci":0.2984,"has_fulltext":false,"cited_by_count":3,"citation_normalized_percentile":{"value":0.48775841,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":95},"biblio":{"volume":"14","issue":"6","first_page":"1168","last_page":"1168"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12139","display_name":"Advanced Thermodynamic Systems and Engines","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T12139","display_name":"Advanced Thermodynamic Systems and Engines","score":0.9997000098228455,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12513","display_name":"Rocket and propulsion systems research","score":0.998199999332428,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T13200","display_name":"Spacecraft and Cryogenic Technologies","score":0.9966999888420105,"subfield":{"id":"https://openalex.org/subfields/2202","display_name":"Aerospace Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/radiator","display_name":"Radiator (engine cooling)","score":0.8887166380882263},{"id":"https://openalex.org/keywords/refrigerant","display_name":"Refrigerant","score":0.8570371866226196},{"id":"https://openalex.org/keywords/stirling-engine","display_name":"Stirling engine","score":0.5552955865859985},{"id":"https://openalex.org/keywords/materials-science","display_name":"Materials science","score":0.530892550945282},{"id":"https://openalex.org/keywords/thermodynamics","display_name":"Thermodynamics","score":0.5252280235290527},{"id":"https://openalex.org/keywords/mechanics","display_name":"Mechanics","score":0.4912380576133728},{"id":"https://openalex.org/keywords/heat-pipe","display_name":"Heat pipe","score":0.47171422839164734},{"id":"https://openalex.org/keywords/nuclear-engineering","display_name":"Nuclear engineering","score":0.47083592414855957},{"id":"https://openalex.org/keywords/heat-flux","display_name":"Heat flux","score":0.4481083154678345},{"id":"https://openalex.org/keywords/piston","display_name":"Piston (optics)","score":0.4439554214477539},{"id":"https://openalex.org/keywords/liquid-helium","display_name":"Liquid helium","score":0.41165217757225037},{"id":"https://openalex.org/keywords/mechanical-engineering","display_name":"Mechanical engineering","score":0.36771565675735474},{"id":"https://openalex.org/keywords/heat-transfer","display_name":"Heat transfer","score":0.2978535294532776},{"id":"https://openalex.org/keywords/helium","display_name":"Helium","score":0.25237271189689636},{"id":"https://openalex.org/keywords/chemistry","display_name":"Chemistry","score":0.2305881679058075},{"id":"https://openalex.org/keywords/gas-compressor","display_name":"Gas compressor","score":0.22447121143341064},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.20200130343437195},{"id":"https://openalex.org/keywords/engineering","display_name":"Engineering","score":0.1625657081604004},{"id":"https://openalex.org/keywords/optics","display_name":"Optics","score":0.13228198885917664}],"concepts":[{"id":"https://openalex.org/C63034144","wikidata":"https://www.wikidata.org/wiki/Q1163026","display_name":"Radiator (engine cooling)","level":2,"score":0.8887166380882263},{"id":"https://openalex.org/C199499590","wikidata":"https://www.wikidata.org/wiki/Q266790","display_name":"Refrigerant","level":3,"score":0.8570371866226196},{"id":"https://openalex.org/C27134321","wikidata":"https://www.wikidata.org/wiki/Q186212","display_name":"Stirling engine","level":2,"score":0.5552955865859985},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.530892550945282},{"id":"https://openalex.org/C97355855","wikidata":"https://www.wikidata.org/wiki/Q11473","display_name":"Thermodynamics","level":1,"score":0.5252280235290527},{"id":"https://openalex.org/C57879066","wikidata":"https://www.wikidata.org/wiki/Q41217","display_name":"Mechanics","level":1,"score":0.4912380576133728},{"id":"https://openalex.org/C37728375","wikidata":"https://www.wikidata.org/wiki/Q600568","display_name":"Heat pipe","level":3,"score":0.47171422839164734},{"id":"https://openalex.org/C116915560","wikidata":"https://www.wikidata.org/wiki/Q83504","display_name":"Nuclear engineering","level":1,"score":0.47083592414855957},{"id":"https://openalex.org/C159188206","wikidata":"https://www.wikidata.org/wiki/Q1478382","display_name":"Heat flux","level":3,"score":0.4481083154678345},{"id":"https://openalex.org/C199524791","wikidata":"https://www.wikidata.org/wiki/Q7198512","display_name":"Piston (optics)","level":3,"score":0.4439554214477539},{"id":"https://openalex.org/C1855228","wikidata":"https://www.wikidata.org/wiki/Q1203476","display_name":"Liquid helium","level":3,"score":0.41165217757225037},{"id":"https://openalex.org/C78519656","wikidata":"https://www.wikidata.org/wiki/Q101333","display_name":"Mechanical engineering","level":1,"score":0.36771565675735474},{"id":"https://openalex.org/C50517652","wikidata":"https://www.wikidata.org/wiki/Q179635","display_name":"Heat transfer","level":2,"score":0.2978535294532776},{"id":"https://openalex.org/C546029482","wikidata":"https://www.wikidata.org/wiki/Q560","display_name":"Helium","level":2,"score":0.25237271189689636},{"id":"https://openalex.org/C185592680","wikidata":"https://www.wikidata.org/wiki/Q2329","display_name":"Chemistry","level":0,"score":0.2305881679058075},{"id":"https://openalex.org/C131097465","wikidata":"https://www.wikidata.org/wiki/Q178898","display_name":"Gas compressor","level":2,"score":0.22447121143341064},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.20200130343437195},{"id":"https://openalex.org/C127413603","wikidata":"https://www.wikidata.org/wiki/Q11023","display_name":"Engineering","level":0,"score":0.1625657081604004},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.13228198885917664},{"id":"https://openalex.org/C165699331","wikidata":"https://www.wikidata.org/wiki/Q461533","display_name":"Wavefront","level":2,"score":0.0},{"id":"https://openalex.org/C178790620","wikidata":"https://www.wikidata.org/wiki/Q11351","display_name":"Organic chemistry","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.3390/sym14061168","is_oa":true,"landing_page_url":"https://doi.org/10.3390/sym14061168","pdf_url":"https://www.mdpi.com/2073-8994/14/6/1168/pdf?version=1654677215","source":{"id":"https://openalex.org/S190787756","display_name":"Symmetry","issn_l":"2073-8994","issn":["2073-8994"],"is_oa":true,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Symmetry","raw_type":"journal-article"},{"id":"pmh:oai:doaj.org/article:d334fdd16876426f9461a1d85e44051b","is_oa":true,"landing_page_url":"https://doaj.org/article/d334fdd16876426f9461a1d85e44051b","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Symmetry, Vol 14, Iss 6, p 1168 (2022)","raw_type":"article"},{"id":"pmh:oai:mdpi.com:/2073-8994/14/6/1168/","is_oa":true,"landing_page_url":"https://dx.doi.org/10.3390/sym14061168","pdf_url":null,"source":{"id":"https://openalex.org/S4306400947","display_name":"MDPI (MDPI AG)","issn_l":null,"issn":null,"is_oa":true,"is_in_doaj":false,"is_core":false,"host_organization":"https://openalex.org/I4210097602","host_organization_name":"Multidisciplinary Digital Publishing Institute (Switzerland)","host_organization_lineage":["https://openalex.org/I4210097602"],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Symmetry","raw_type":"Text"}],"best_oa_location":{"id":"doi:10.3390/sym14061168","is_oa":true,"landing_page_url":"https://doi.org/10.3390/sym14061168","pdf_url":"https://www.mdpi.com/2073-8994/14/6/1168/pdf?version=1654677215","source":{"id":"https://openalex.org/S190787756","display_name":"Symmetry","issn_l":"2073-8994","issn":["2073-8994"],"is_oa":true,"is_in_doaj":false,"is_core":true,"host_organization":"https://openalex.org/P4310310987","host_organization_name":"Multidisciplinary Digital Publishing Institute","host_organization_lineage":["https://openalex.org/P4310310987"],"host_organization_lineage_names":["Multidisciplinary Digital Publishing Institute"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Symmetry","raw_type":"journal-article"},"sustainable_development_goals":[{"display_name":"Affordable and clean energy","score":0.7900000214576721,"id":"https://metadata.un.org/sdg/7"}],"awards":[],"funders":[],"has_content":{"pdf":true,"grobid_xml":false},"content_urls":{"pdf":"https://content.openalex.org/works/W4281752827.pdf"},"referenced_works_count":14,"referenced_works":["https://openalex.org/W1967698592","https://openalex.org/W2107202669","https://openalex.org/W2203248266","https://openalex.org/W2476632704","https://openalex.org/W2516169369","https://openalex.org/W2890725949","https://openalex.org/W2999983907","https://openalex.org/W3009978263","https://openalex.org/W3112817969","https://openalex.org/W3188670931","https://openalex.org/W3198129944","https://openalex.org/W4207037845","https://openalex.org/W6602317090","https://openalex.org/W6676077593"],"related_works":["https://openalex.org/W2372996181","https://openalex.org/W3029730879","https://openalex.org/W2032818860","https://openalex.org/W2160162274","https://openalex.org/W2625013796","https://openalex.org/W2004456097","https://openalex.org/W1614984088","https://openalex.org/W576092481","https://openalex.org/W2165460293","https://openalex.org/W1967255432"],"abstract_inverted_index":{"In":[0,177],"this":[1],"paper,":[2],"an":[3],"enhanced":[4],"calculation":[5,26],"method":[6,27,44],"of":[7,32,38,53,118,123,208],"a":[8,67,127,157],"heat":[9,33,184],"rejection":[10],"system":[11],"operating":[12],"on":[13,137],"the":[14,24,30,36,39,51,58,62,78,85,115,119,134,139,142,146,150,164,167,183,188,201,206,209],"moon":[15],"is":[16],"presented.":[17],"This":[18],"was":[19,90,152,173],"taken":[20],"into":[21],"consideration":[22],"in":[23,29,66],"developed":[25,43,80],"and":[28,56,61,71,97,204],"propagation":[31],"fluxes":[34],"with":[35,72],"radiation":[37],"removed":[40],"heat.":[41],"The":[42,121],"made":[45,129,195],"it":[46,130,196],"possible":[47,131,198],"to":[48,77,132,197,199],"effectively":[49],"evaluate":[50],"capabilities":[52],"various":[54],"refrigerants":[55],"choose":[57],"radiator":[59,82,189,210],"parameters":[60,117],"refrigerant":[63,128,140,151],"flow":[64,159],"regime":[65],"less":[68],"time-consuming":[69],"process":[70],"minimal":[73],"deviations":[74],"(<5%)":[75],"compared":[76],"previously":[79],"two-dimensional":[81],"model":[83],"by":[84,187,191],"authors.":[86],"A":[87],"comparative":[88],"analysis":[89],"carried":[91],"out":[92],"for":[93,113,148,169],"two":[94],"refrigerants:":[95],"helium":[96],"liquid":[98,107,124,171,180],"ammonia.":[99],"It":[100],"has":[101],"been":[102],"established":[103],"that":[104],"when":[105],"using":[106,179],"ammonia,":[108],"there":[109],"are":[110],"more":[111],"possibilities":[112],"varying":[114],"geometric":[116],"radiator.":[120,143],"use":[122],"ammonia":[125,172,181],"as":[126],"reduce":[133,205],"power":[135,147,168],"spent":[136],"pumping":[138,149,170],"through":[141],"Using":[144],"helium,":[145],"NR=":[153,174],"5.1":[154],"W":[155],"during":[156],"turbulent":[158],"Re":[160],"=":[161],"4500.":[162],"On":[163],"other":[165],"hand,":[166],"0.27":[175],"W.":[176],"addition,":[178],"increased":[182],"flux":[185],"radiated":[186],"pipe":[190],"3.9":[192],"times,":[193],"which":[194],"increase":[200],"fin":[202],"width":[203],"length":[207],"pipe.":[211]},"counts_by_year":[{"year":2025,"cited_by_count":1},{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":1}],"updated_date":"2026-05-22T06:13:13.366637","created_date":"2025-10-10T00:00:00"}