Heat Recovery Systems and CHP最新文献

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Instrument for thermal radiation flux measurement in high temperature gas flow (Cuernavaca instrument) 高温气流热辐射通量测量仪(Cuernavaca)
Heat Recovery Systems and CHP Pub Date : 1995-05-01 DOI: 10.1016/0890-4332(95)90003-9
N.H. Afgan , A.I. Leontiev
{"title":"Instrument for thermal radiation flux measurement in high temperature gas flow (Cuernavaca instrument)","authors":"N.H. Afgan ,&nbsp;A.I. Leontiev","doi":"10.1016/0890-4332(95)90003-9","DOIUrl":"10.1016/0890-4332(95)90003-9","url":null,"abstract":"<div><p>A new instrument for hemispherical radiation heat flux measurement is proposed. It is based on the theory of blow of the boundary layer, taking into account that at the critical mass flow rate through the porous surface the thermal boundary layer is blown off and only radiation flux high temperature gases reaches the porous surface. With the measurement of blow of gas flow and the temperature of the porous material, the respective heat flux is obtained.</p></div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 4","pages":"Pages 347-350"},"PeriodicalIF":0.0,"publicationDate":"1995-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90003-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81959870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 14
On the performance of absorption heat pump-transformers 吸收式热泵变压器的性能研究
Heat Recovery Systems and CHP Pub Date : 1995-05-01 DOI: 10.1016/0890-4332(95)90001-2
Vincenzo Tufano
{"title":"On the performance of absorption heat pump-transformers","authors":"Vincenzo Tufano","doi":"10.1016/0890-4332(95)90001-2","DOIUrl":"10.1016/0890-4332(95)90001-2","url":null,"abstract":"<div><p>A simplified mathematical model has been used to compute the performance of an absorption heat pump-transformer (HPT). This two-stage apparatus, which consists of a heat transformer driven by low-temperature cooling water and of a heat pump driven by high-temperature steam, has been compared with a simpler absorption heat pump.</p><p>Different indices of performance show that the HPT may give a better performance at a competitive cost. In particular, the upgraded heat load can be produced at a markedly higher temperature. The main drawback of the HPT consists of the smaller values of the ratio between upgraded and heat loads.</p></div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 4","pages":"Pages 327-332"},"PeriodicalIF":0.0,"publicationDate":"1995-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90001-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86704736","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
The effective length of a flat plate heat pipe covered partially by a strip heater on the evaporator section 在蒸发器部分被带式加热器覆盖的平板热管的有效长度
Heat Recovery Systems and CHP Pub Date : 1995-05-01 DOI: 10.1016/0890-4332(95)90007-1
K.H. Sun, C.Y. Liu, K.C. Leong
{"title":"The effective length of a flat plate heat pipe covered partially by a strip heater on the evaporator section","authors":"K.H. Sun,&nbsp;C.Y. Liu,&nbsp;K.C. Leong","doi":"10.1016/0890-4332(95)90007-1","DOIUrl":"10.1016/0890-4332(95)90007-1","url":null,"abstract":"<div><p>An approximate method is presented for calculating the effective length of a flat heat pipe when a strip heater is partially covering the evaporator section. For a specific width of the strip heater, the optimal position to achieve a minimum effective length is found when the heater is placed symmetrically at the centre of the evaporator section. In this position, a higher value of the capillary heat transport limit can be achieved as compared to the case where the heater is placed on one side of the evaporator section.</p></div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 4","pages":"Pages 383-388"},"PeriodicalIF":0.0,"publicationDate":"1995-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90007-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76077048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Maximum obtainable power of a carnot combined power plant 卡诺联合发电厂的最大可得功率
Heat Recovery Systems and CHP Pub Date : 1995-05-01 DOI: 10.1016/0890-4332(95)90004-7
Chih Wu
{"title":"Maximum obtainable power of a carnot combined power plant","authors":"Chih Wu","doi":"10.1016/0890-4332(95)90004-7","DOIUrl":"10.1016/0890-4332(95)90004-7","url":null,"abstract":"<div><p>Maximum obtainable power of a combined endoreversible carnot cycle is analyzed. It is found that there is a bound on the obtainable power of real combined cycles. This bound provides a new theoretical criterion for the evaluation of existing combined power generating systems or for influencing the design of future combined heat engines.</p></div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 4","pages":"Pages 351-355"},"PeriodicalIF":0.0,"publicationDate":"1995-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90004-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90461507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Design, manufacture and testing of a closed cycle thermosyphon rankine engine 封闭循环热虹吸朗肯发动机的设计、制造和试验
Heat Recovery Systems and CHP Pub Date : 1995-05-01 DOI: 10.1016/0890-4332(95)90002-0
T. Nguyen , P. Johnson , A. Akbarzadeh , K. Gibson , M. Mochizuki
{"title":"Design, manufacture and testing of a closed cycle thermosyphon rankine engine","authors":"T. Nguyen ,&nbsp;P. Johnson ,&nbsp;A. Akbarzadeh ,&nbsp;K. Gibson ,&nbsp;M. Mochizuki","doi":"10.1016/0890-4332(95)90002-0","DOIUrl":"10.1016/0890-4332(95)90002-0","url":null,"abstract":"<div><p>The Thermosyphon Rankine Engine (TSR) is a recent concept for power generation using solar or other available low grade heat sources. The basis of the engine is the modification of a heat pipe, with its excellent heat and mass transfer characteristics, to incorporate a turbine, thereby making the system into a Rankine Cycle Engine.</p><p>The TSR is directed towards power production from solar ponds, geothermal energy and heat produced by solar collectors, as well as for waste heat utilisation for electrical power generation.</p><p>A theoretical formulation and results from experiments on prototype units are presented. Based on the results, it is concluded that the TSR engine may play an important role for conversion into electrical energy of thermal energy produced by conventional solar collectors, geothermal sources and waste heat.</p></div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 4","pages":"Pages 333-346"},"PeriodicalIF":0.0,"publicationDate":"1995-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90002-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88307605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 37
Cogeneration with gas turbines for dryers and hot water boilers 热电联产与燃气轮机烘干机和热水锅炉
Heat Recovery Systems and CHP Pub Date : 1995-04-01 DOI: 10.1016/0890-4332(95)90015-2
JoséMa Sala Lizarraga, Augusto V.S. Baeza Aguado
{"title":"Cogeneration with gas turbines for dryers and hot water boilers","authors":"JoséMa Sala Lizarraga,&nbsp;Augusto V.S. Baeza Aguado","doi":"10.1016/0890-4332(95)90015-2","DOIUrl":"10.1016/0890-4332(95)90015-2","url":null,"abstract":"<div><p>This paper describes the main characteristics, mode of operation and incidents which occurred during the start-up of a cogeneration plant, in operation since June 1993, which supplies most of the energy required by moulded container dryers, as well as that required to produce hot water. The plant consists of two gas turbines linked to their corresponding electric generators. Exhaust gases from these turbines are distributed through a manifold which is common to the four dryers and to the hot water boiler. Net electric power generated by the plant is 2090 kW and the primary energy saving expected is <span><math><mtext>23.6 × 10</mtext><msup><mi></mi><mn><mtext>6 </mtext><mtext>th</mtext></mn></msup></math></span> (UCP) upper calorific power year<sup>−1</sup>, this represents a percentage saving of 48.7%, thus largely meeting the requirements of a self-generator.</p></div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 3","pages":"Pages 319-325"},"PeriodicalIF":0.0,"publicationDate":"1995-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90015-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76445466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Effect of control modes and turbine cooling on the part load performance in the gas turbine cogeneration system 控制方式和涡轮冷却对燃气轮机热电联产系统部分负荷性能的影响
Heat Recovery Systems and CHP Pub Date : 1995-04-01 DOI: 10.1016/0890-4332(95)90012-8
Tong Seop Kim, Sung Tack Ro
{"title":"Effect of control modes and turbine cooling on the part load performance in the gas turbine cogeneration system","authors":"Tong Seop Kim,&nbsp;Sung Tack Ro","doi":"10.1016/0890-4332(95)90012-8","DOIUrl":"10.1016/0890-4332(95)90012-8","url":null,"abstract":"<div><p>This work aims to analyse the part load performance in a cogeneration system which consists of a single shaft gas turbine and a heat recovery steam generator. Two distinct part load control modes are considered: the constant air flow and the variable air flow. Meanwhile, the effect of variation in the coolant fraction is evaluated, whose purpose is to maintain the blade temperature as high as possible and thus minimise the coolant consumption. The design point parameters of the heat recovery steam generator are determined by the limiting factors on the part load operation, which are represented by the pinch point temperature difference and the approach temperature difference. It turns out that for both air flow control modes, the variable control of coolant fraction leads to improvement of the gas turbine efficiency, while it reduces the heat recovery potential. On the whole, the variable control of coolant fraction has a favourable effect on the overall fuel economy in the cogeneration system.</p></div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 3","pages":"Pages 281-291"},"PeriodicalIF":0.0,"publicationDate":"1995-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90012-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79052657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Heat pumps in industry II: Applications 热泵在工业II:应用
Heat Recovery Systems and CHP Pub Date : 1995-04-01 DOI: 10.1016/0890-4332(95)90014-4
R.M. Lazzarin
{"title":"Heat pumps in industry II: Applications","authors":"R.M. Lazzarin","doi":"10.1016/0890-4332(95)90014-4","DOIUrl":"10.1016/0890-4332(95)90014-4","url":null,"abstract":"<div><p>A selection of applications of heat pumps in industry is described, reporting plant lay-outs and performances. The selection includes compression heat pumps at different temperatures, vapour recompression systems, absorption heat pumps and heat transformers.</p></div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 3","pages":"Pages 305-317"},"PeriodicalIF":0.0,"publicationDate":"1995-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90014-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88462338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Optimal choice of the performance parameters of an absorption heat transformer 吸收式热变压器性能参数的优化选择
Heat Recovery Systems and CHP Pub Date : 1995-04-01 DOI: 10.1016/0890-4332(95)90009-8
Jincan Chen
{"title":"Optimal choice of the performance parameters of an absorption heat transformer","authors":"Jincan Chen","doi":"10.1016/0890-4332(95)90009-8","DOIUrl":"10.1016/0890-4332(95)90009-8","url":null,"abstract":"<div><p>The optimal performance of an absorption heat transformer, i.e. a type II absorption heat pump, is investigated by using the cyclic model with continuous flow. The effect of thermal resistances between the heat transformer and the heat reservoirs is considered in the model. A general expression related to the rate of heat-pumping, the coefficient of performance and the overall heat transfer area of the heat transformer is derived. The expression is used to optimise the main performance parameters of the heat transformer. The maximum rate of heat-pumping and the corresponding coefficient of performance are calculated. For a given overall heat transfer area of the heat transformer, the optimal relation of the heat transfer areas of the heat exchangers is obtained. The problems concerning the optimal choices of other performance parameters are discussed. The results obtained here can not only enrich the theory of finite time thermodynamics, but also provide some new theoretical bases for the optimal design and operation of real absorption heat transformers.</p></div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 3","pages":"Pages 249-256"},"PeriodicalIF":0.0,"publicationDate":"1995-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90009-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91068938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 34
Design and experimental performance evaluation of an absorption heat transformer with self-circulation 自循环吸收式热变压器的设计与实验性能评价
Heat Recovery Systems and CHP Pub Date : 1995-04-01 DOI: 10.1016/0890-4332(95)90010-1
K. Abrahamsson, A. Gidner, Å. Jernqvist
{"title":"Design and experimental performance evaluation of an absorption heat transformer with self-circulation","authors":"K. Abrahamsson,&nbsp;A. Gidner,&nbsp;Å. Jernqvist","doi":"10.1016/0890-4332(95)90010-1","DOIUrl":"10.1016/0890-4332(95)90010-1","url":null,"abstract":"<div><p>A 10 kW experimental absorption heat transformer unit operating with self-circulation has been thoroughly tested. The self-circulation is obtained according to the thermosyphon principle. The pressure difference in the unit is achieved through a difference in hydrostatic pressures. Theoretical relationships for the pressure profiles within the different components of the heat transformer have been derived. Stabilising the self-circulation has been the primary objective in this work, rather than the optimisation of the efficiency of heating and cooling areas. A satisfactory stable operation with self-circulation has been achieved.</p><p>A reference heat transformer plant, delivering 100 kW, has been designed and installed in a major pulp and paper mill. This unit is directly incorporated with one of the evaporation plants of the mill. Plant operation data obtained under real industrial conditions are presented.</p></div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 3","pages":"Pages 257-272"},"PeriodicalIF":0.0,"publicationDate":"1995-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90010-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75112725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 42
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