Heat Recovery Systems and CHP最新文献_第2页

The commissioning of an integrated heat pump-assisted geothermal brine purification system 综合热泵辅助地热盐水净化系统的调试

Heat Recovery Systems and CHP Pub Date : 1995-10-01 DOI: 10.1016/0890-4332(95)90045-4

J. Siqueiros , C.L. Heard , F.A. Holland

引用次数: 8

Solar-assisted liquid metal MHD power generation: A state of the art study 太阳能辅助液态金属MHD发电:一项最新研究

Heat Recovery Systems and CHP Pub Date : 1995-10-01 DOI: 10.1016/0890-4332(95)90047-0

S.C. Kaushik, S.S. Verma, A. Chandra

{"title":"Solar-assisted liquid metal MHD power generation: A state of the art study","authors":"S.C. Kaushik, S.S. Verma, A. Chandra","doi":"10.1016/0890-4332(95)90047-0","DOIUrl":"10.1016/0890-4332(95)90047-0","url":null,"abstract":"<div>The research and development of LMMHD energy conversion (EC) systems which started in the 1960s has already come a long way and is heading towards commercialization. Design and development of such systems has to deal with a number of questions relating to single- and two-phase flows of molten metals, including different patterns of two-phase flow, interphase, phenomena, heat transfer, performance of LMMHD components and compatibility of liquid metals with other fluids and with confinement materials. Liquid metal MHD (LMMHD) power conversion systems proposed many years ago are gaining increasing attention in their various proposed modes, consisting of single-phase or two-phase fluid flow for a wide range of heat sources, e.g. solar energy, waste heat, nuclear energy, etc.Liquid metal MHD (LMMHD) power systems have been recently proposed for direct electrical energy conversion of low grade thermal sources of energy, like solar energy. Solar-powered LMMHD power generation systems are very attractive regarding efficiency and cost per unit of installed power. Theoretical and experimental investigations carried out in the various aspects of these systems are presented. A state of the art review of activities in the solar-powered LMMHD power systems field which have taken place so far is described here.</div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 7","pages":"Pages 675-689"},"PeriodicalIF":0.0,"publicationDate":"1995-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90047-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89675180","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: 20

Analysis of combustion chamber insulation effects on the performance and exhaust emissions of a DI diesel engine using a multi-zone model 用多区模型分析燃烧室隔热对直喷式柴油机性能和废气排放的影响

Heat Recovery Systems and CHP Pub Date : 1995-10-01 DOI: 10.1016/0890-4332(95)90048-9

C.D. Rakopoulos, G.N. Taklis, E.I. Tzanos

{"title":"Analysis of combustion chamber insulation effects on the performance and exhaust emissions of a DI diesel engine using a multi-zone model","authors":"C.D. Rakopoulos, G.N. Taklis, E.I. Tzanos","doi":"10.1016/0890-4332(95)90048-9","DOIUrl":"10.1016/0890-4332(95)90048-9","url":null,"abstract":"<div>A comprehensive two-dimensional multi-zone model of a diesel engine cycle is presented in this study, in order to examine the influence of insulating the combustion chamber on the performance and exhaust pollutants emissions of a naturally-aspirated, direct injection (DI), four-stroke, water-cooled diesel engine. The heat insulation is taken into account by the corresponding rise of wall temperature, since this is the final result of insulation useful for the study. It is found that there is no remarkable improvement of engine efficiency, since the decrease of volumetric efficiency has a greater influence on it than the decrease of heat loss to the coolant, which is converted mainly to exhaust gas enthalpy (significant rise of the exhaust gas temperature). As far as the concentration of exhaust pollutant emissions is concerned, it is found that the rising heat insulation leads to a significant increase of the exhaust nitric oxide (NO) and to a moderate increase of the exhaust soot concentration. Plots of temperature, equivalence ratio, NO and soot distributions at various instants of time inside the combustion chamber, emanating from the application of the multi-zone model, aid the correct interpretation of the insulation effects gaining insight into the underlying mechanisms involved.</div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 7","pages":"Pages 691-706"},"PeriodicalIF":0.0,"publicationDate":"1995-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90048-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74637845","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: 22

Characteristics of two-phase closed thermosiphons for medium temperature heat recovery applications 中温热回收用两相封闭式热虹吸管的特性

Heat Recovery Systems and CHP Pub Date : 1995-10-01 DOI: 10.1016/0890-4332(95)90043-8

Ioan Sauciuc, Aliakbar Akbarzadeh, Peter Johnson

{"title":"Characteristics of two-phase closed thermosiphons for medium temperature heat recovery applications","authors":"Ioan Sauciuc, Aliakbar Akbarzadeh, Peter Johnson","doi":"10.1016/0890-4332(95)90043-8","DOIUrl":"10.1016/0890-4332(95)90043-8","url":null,"abstract":"<div>Application of two-phase closed thermosiphons to heat recovery systems has led the authors to investigate the performance of thermosiphons at medium temperatures. Two-phase closed thermosiphons working under various conditions have been tested and their thermal performance has been measured for mean evaporator wall temperatures between 100°C and 250°C. A description of the design and construction of the test facility is included. Aspects of safety of container materials have been investigated for water as the working fluid. It was found that copper-nickel alloys and carbon-manganese stainless steel are suitable container materials for the range of temperatures considered. The critical heat flux and dry-out limit were observed in experiments with a 13.2 mm diameter thermosiphon. Boiling heat transfer phenomena and overall thermal conductance have been experimentally investigated. It was found that an increase in thermosiphon diameter changes the boiling mechanism from saturated film boiling to nucleate boiling. The test results show a good agreement with published correlation criteria. Further experiments are needed to determine the optimum pipe diameter for the applications under consideration.</div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 7","pages":"Pages 631-640"},"PeriodicalIF":0.0,"publicationDate":"1995-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90043-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85479443","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: 27

1st International Conference on Science, Engineering and Technology of Intesive Processing 第一届精深加工科学、工程与技术国际会议

Heat Recovery Systems and CHP Pub Date : 1995-10-01 DOI: 10.1016/0890-4332(95)90049-7

引用次数: 0

On the dynamics and control of a polymer film compact heat exchanger 聚合物薄膜紧凑型换热器动力学与控制研究

Heat Recovery Systems and CHP Pub Date : 1995-10-01 DOI: 10.1016/0890-4332(95)90041-1

A.G. Davidson, R.J. Jachuck, M.T. Tham, C. Ramshaw

{"title":"On the dynamics and control of a polymer film compact heat exchanger","authors":"A.G. Davidson, R.J. Jachuck, M.T. Tham, C. Ramshaw","doi":"10.1016/0890-4332(95)90041-1","DOIUrl":"10.1016/0890-4332(95)90041-1","url":null,"abstract":"<div>Process intensification has the potential to change the state of the chemical and process industries. The polymer film compact heat exchanger (PFCHE) is a new type of intensified heat exchanger. The potential market is seen as being large [1] but as yet the unit has not been adopted by industry. The advantageous heat transfer characteristics of such a unit have been shown in previous work [2]. This work investigates the dynamic behaviour of the PFCHE and the process control problems that may arise.The PFCHE available at Newcastle University has been used to generate dynamic temperature data. The data have been employed to formulate and validate time series type models. These models were then used in simulated process control studies. The dynamic behaviour of the unit appeared to be linear and response times were quick. It was found that the responses of the model to disturbances in inlet temperatures could be controlled well using a digital form of PI control. There were, however, doubts as to the ability of the model to completely replicate the system.</div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 7","pages":"Pages 609-617"},"PeriodicalIF":0.0,"publicationDate":"1995-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90041-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81182143","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: 1

Second law optimization of a latent heat storage system with PCMS having different melting points 不同熔点PCMS潜热蓄热系统的第二定律优化

Heat Recovery Systems and CHP Pub Date : 1995-10-01 DOI: 10.1016/0890-4332(95)90044-6

Takayuki Watanabe, Atsushi Kanzawa

引用次数: 86

Regenerative adsorption heat pumps: Optimization of the design 蓄热式吸附热泵:优化设计

Heat Recovery Systems and CHP Pub Date : 1995-08-01 DOI: 10.1016/0890-4332(95)90063-2

G.H.W. van Benthem, G. Cacciola, G. Restuccia

引用次数: 45

Thermodynamic cycle, correlations and nomograph for NH3NaSCN absorption refrigeration systems NH3NaSCN吸收式制冷系统的热力学循环、相关关系和nomograph

Heat Recovery Systems and CHP Pub Date : 1995-08-01 DOI: 10.1016/0890-4332(95)90069-1

E.D. Rogdakis, K.A. Antonopoulos

{"title":"Thermodynamic cycle, correlations and nomograph for NH3NaSCN absorption refrigeration systems","authors":"E.D. Rogdakis, K.A. Antonopoulos","doi":"10.1016/0890-4332(95)90069-1","DOIUrl":"10.1016/0890-4332(95)90069-1","url":null,"abstract":"<div>The detailed thermodynamic cycle of the NH3NaSCN absorption refrigeration unit is presented, based on the thermodynamic properties of the working media. Correlations are developed, which express the coefficient of performance and the cooling capacity in terms of the required evaporation temperature, Tev, and the available ambient temperature, Tamb. A nomograph is also presented, which shows in a compact form the behaviour of the NH3NaSCN system and allows direct estimation of its main characteristics. It is concluded that if (Tamb − Tev) varies from 0 to 40°C, the theoretical coefficient of performance decreases linearly from 95 to 77%. For the same range of (Tamb − Tev) the theoretical cooling capacity varies from 1150 to 1300 kJ/kg NH3 if Tev varies from 0 to −15°C. Under the conditions examined, for Tamb − Tev > 23°C, the coefficient of performance of the NH3NaSCN system becomes higher than that of the NH3LiNO3 system. The observed increase reached 4% at Tamb − Tev = 40°C.</div>","PeriodicalId":100603,"journal":{"name":"Heat Recovery Systems and CHP","volume":"15 6","pages":"Pages 591-599"},"PeriodicalIF":0.0,"publicationDate":"1995-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0890-4332(95)90069-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90241903","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: 19

Simulation of the dynamic behaviour of a hydronic floor heating system 液压地板采暖系统的动态特性模拟

Heat Recovery Systems and CHP Pub Date : 1995-08-01 DOI: 10.1016/0890-4332(95)90061-6

S.Y. Ho, R.E. Hayes, R.K. Wood

引用次数: 36