[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-656953-105":59,"doc-detail-656953-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","gas-power-cycles-basic-considerations-in-the-analysis-of-power-cycles-the-carnot-cycle-and-its-value-in-engineering","GAS POWER CYCLES - BASIC CONSIDERATIONS IN THE ANALYSIS OF POWER CYCLES - THE CARNOT CYCLE AND ITS VALUE IN ENGINEERING","","Covers the analysis of gas power cycles by contrasting ideal internally reversible cycles with realistic engines and explaining how thermal efficiency relates to areas on T–s diagrams. Presents key idealizations (no friction, quasi-equilibrium expansion/compression, negligible heat transfer in connecting pipes) and the interpretation of net work using enclosed areas on P–v and T–s diagrams. Then introduces the Carnot cycle structure and how efficiency changes with heat-addition and heat-rejection temperatures, followed by air-standard assumptions for cycle modeling. Also surveys reciprocating engines and outlines Otto and Diesel ideal cycles with their governing processes and design implications.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/gas-power-cycles-basic-considerations-in-the-analysis-of-power-cycles-the-carnot-cycle-and-its-value-in-engineering/656953/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/gas-power-cycles-basic-considerations-in-the-analysis-of-power-cycles-the-carnot-cycle-and-its-value-in-engineering/656953.png","ImageObject",300,407,{"name":92,"@type":93},"DoDO","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-25",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"How is thermal efficiency related to areas on T–s diagrams for a cycle?","Question",{"text":112,"@type":113},"Thermal efficiency corresponds to the ratio of the area enclosed by the cyclic curve to the area under the heat-addition curve on a T–s diagram. Increasing this ratio increases thermal efficiency.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Why is the Carnot cycle considered highly efficient but not suitable as a realistic model?",{"text":117,"@type":113},"The Carnot cycle consists of totally reversible processes and attains the highest thermal efficiency between the same temperature levels. Because it is totally reversible, it does not represent realistic irreversibilities found in real engines.",{"name":119,"@type":110,"acceptedAnswer":120},"What distinguishes air-standard assumptions used in analyzing cycles?",{"text":121,"@type":113},"Combustion is modeled as external heat addition, the working fluid is treated as air in a closed loop behaving as an ideal gas, and the cycle processes are internally reversible. The exhaust is represented as heat rejection that restores the working fluid to its initial state.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},656953,1793085058,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":46,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":31},962093270745,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","GAS POWER CYCLES  \nCopyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.  \nBASIC CONSIDERATIONS IN THE ANALYSIS  \nOF POWER CYCLES Thermal efficiency of heat engines  \nMost power-producing devices operate on cycles. Ideal cycle: A cycle that resembles the actual cycle closely but is made up totally of internally reversible processes.  \nReversible cycles such as Carnot cycle have the highest thermal efficiency of all heat engines  \noperating between the same temperature levels. Unlike ideal cycles, they are totally reversible, and unsuitable as a realistic model.  \nModeling is a powerful engineering tool that provides great insight and simplicity at the expense of some loss in accuracy.  \nThe analysis of many complex processes can be reduced to a manageable level by utilizing some idealizations.  \nOn a T-s diagram, the ratio of the area enclosed by the cyclic curve to the area under the heat-addition process curve represents the thermal efficiency of the cycle. Any modification that increases the ratio of these two areas will also increase the thermal efficiency of the cycle.  \nCare should be exercisedin the interpretation of the results from ideal cycles.  \nThe idealizations and simplifications in the analysis of power cycles:  \n1. The cycle does not involve any friction. Therefore, the working fluid does not experience any pressure drop as it flows in pipes or devices such as heat exchangers.  \n2. All expansion and compression processes take place in a quasi-equilibrium manner.  \n3. The pipes connecting the various components of a system are well insulated, and heat transfer through themis negligible.  \nOn both P-v and T-s diagrams, the area enclosed by the process curve represents the net work of the cycle.  \nTHE CARNOT CYCLE AND ITS VALUE IN ENGINEERING  \nThe Carnot cycle is composed of four totally reversible processes: isothermal heat addition, isentropic expansion, isothermal heat rejection, and isentropic compression.  \nFor both ideal and actual cycles: Thermal efficiency increases with an increase in the average temperature at which heat is supplied to the system or with a decrease in the average temperature at which heat is rejected from the system.  \nA steady-flow Carnot engine.  \nP-v and T-s diagrams of a Carnot cycle.  \n4  \nAIR-STANDARD ASSUMPTIONS  \nAir-standard assumptions:  \n1.  \n2.  \n3.  \n4.  \nThe combustion process is replaced by a heat-addition process in ideal cycles.  \nThe working fluid is air, which continuously circulates in a closed loop and always behaves as an ideal gas. All the processes that make up the cycle are internally reversible. The combustion process is replaced by a heat-addition process from an external source.  \nThe exhaust process is replaced by a heat-rejection process that restores the working fluid to its initial state.  \nCold-air-standard assumptions: When the working fluid is considered tobe air with constant specific heats at room temperature (25 ° C) .  \nAir-standard cycle: A cycle for which the air-standard assumptions are applicable.  \nAN OVERVIEW OF RECIPROCATING ENGINES  \nCompression ratio Mean effective pressure  \n• Spark-ignition (SI) engines  \n• Compression-ignition (CI) engines  \nNomenclature for reciprocating engines.  \nOTTO CYCLE: THE IDEAL CYCLE FOR SPARK-IGNITION ENGINES  \nActual and ideal cycles in spark-ignition engines and their P-v diagrams.  \nFour-stroke cycle  \n1 cycle = 4 stroke = 2 revolution  \nTwo-stroke cycle  \n1 cycle = 2 stroke = 1 revolution  \nT-s diagram of the ideal Otto cycle.  \nThe two-stroke engines are generally less efficient than their four-stroke counterparts but they are relatively simple and inexpensive, and they have high power-to-weight and power-to-volume ratios.  \nSchematic of a two-stroke reciprocating engine.  \n8  \nIn SI engines, the compression ratio is limited by autoignition or engine knock.  \nThe thermal efficiency of the Otto cycle increases with the specific heat ratio k of the working fluid.  \nTh","cbCaia43xsP5csNW","https://ap.wps.com/l/cbCaia43xsP5csNW","pdf",1938544,"English","# BASIC CONSIDERATIONS IN THE ANALYSIS OF POWER CYCLES\n## Thermal efficiency and idealizations\n## Interpretation on T-s and P-v diagrams\n# THE CARNOT CYCLE AND ITS VALUE IN ENGINEERING\n## Carnot cycle process structure\n## Efficiency trends with temperature levels\n# AIR-STANDARD ASSUMPTIONS\n## Air-standard cycle and cold-air-standard assumptions\n# AN OVERVIEW OF RECIPROCATING ENGINES\n## Spark-ignition vs compression-ignition\n# OTTO CYCLE: THE IDEAL CYCLE FOR SPARK-IGNITION ENGINES\n## Four-stroke and two-stroke operation\n## Compression ratio limits and efficiency trends\n# DIESEL CYCLE: THE IDEAL CYCLE FOR COMPRESSION-IGNITION ENGINES\n## Compression ratio capability and ideal process sequence","[{\"question\":\"How is thermal efficiency related to areas on T–s diagrams for a cycle?\",\"answer\":\"Thermal efficiency corresponds to the ratio of the area enclosed by the cyclic curve to the area under the heat-addition curve on a T–s diagram. Increasing this ratio increases thermal efficiency.\"},{\"question\":\"Why is the Carnot cycle considered highly efficient but not suitable as a realistic model?\",\"answer\":\"The Carnot cycle consists of totally reversible processes and attains the highest thermal efficiency between the same temperature levels. Because it is totally reversible, it does not represent realistic irreversibilities found in real engines.\"},{\"question\":\"What distinguishes air-standard assumptions used in analyzing cycles?\",\"answer\":\"Combustion is modeled as external heat addition, the working fluid is treated as air in a closed loop behaving as an ideal gas, and the cycle processes are internally reversible. The exhaust is represented as heat rejection that restores the working fluid to its initial state.\"}]","GAS POWER CYCLES - BASIC CONSIDERATIONS IN THE ANALYSIS OF POWER CYCLES - THE CARNOT CYCLE AND ITS VALUE IN ENGINEERING | PDF",1792971741]