JOURNAL OF THERMAL SCIENCE（JTS） International Journal of Thermal and Fluid Sciences

ＪＯＵＲＮＡＬＯＦＴＨＥＲＭＡＬＳＣＩＥＮＣＥ（ＪＴＳ）ＩｎｔｅｒｎａｔｉｏｎａｌＪｏｕｒｎａｌｏｆＴｈｅｒｍａｌａｎｄＦｌｕｉｄＳｃｉｅｎｃｅｓ￥ＥｄｉｔｏｒｉａｌＡｄｖｉｓｏｒｙＢｏａｒｄＪＯＵＲＮＡＬＯＦＴＨＥＲＭＡＬＳＣＩＥＮＣＥ（ＪＴＳ）Ｉ...     

GE公司将提供新型“EC”系列燃气轮机

ＧＥ公司将提供新型“ＥＣ”系列燃气轮机ＧＥ公司将对目前功率为８３．ＳＭＷ的ＭＳ７００１ＥＡ型和１２３．４ＭＷ的ＭＳ９００ｌＥ型燃气轮机进行改型设计，分别用于６０ＨＺ和５０ＹＩＺ的电网。改型的细节尚未透露，据报道改型的ＭＳ７００１ＥＣ机组，在ＩＳＯ条件...     

JOURNAL OF THERMAL SCIENCE (JTS)

ＪＯＵＲＮＡＬ　ＯＦ　ＴＨＥＲＭＡＬ　ＳＣＩＥＮＣＥ（ＪＴＳ）ＪＯＵＲＮＡＬＯＦＴＨＥＲＭＡＬＳＣＩＥＮＣＥ（ＪＴＳ）￥（ＩｎｔｅｒｎａｔｉｏｎａｌＪｏｕｒｎａｌｏｆＴｈｅｒｍａｌａｎｄＦｌｕｉｄＳｃｉｅｎｃｅｓ）Ｅｄｉｔｏｒ－ｉｎ－ＣｈｉｅｆＰｒｏ...     

JOURNAL OF THERMAL SCIENCE(JTS) International Journal of Thermal and Fluid Sciences

ＪＯＵＲＮＡＬＯＦＴＨＥｘｔＭＡＬＳＣＩＥＮＣＥ（ＪＴＳ）ＩｎｔｅｒｎａｔｉｏｎａｌＪｏｕｒｎａｌｏｆ　ＴｈｅｒｍａｌａｎｄＦｌｕｉｄＳｃｉｅｎｃｅｓＪＯＵＲＮＡＬＯＦＴＨＥｘｔＭＡＬＳＣＩＥＮＣＥ（ＪＴＳ）ＩｎｔｅｒｎａｔｉｏｎａｌＪｏｕｒｎａｌｏ...     

JOURNAL OF THERMAL SCIENCE（JTS） International Journal of Thermal and Fluid Sciences

ＪＯＵＲＮＡＬ　ＯＦ　ＴＨＥＲＭＡＬ　ＳＣＩＥＮＣＥ（ＪＴＳ）　Ｉｎｔｅｒｎａｔｉｏｎａｌ　Ｊｏｕｒｎａｌ　ｏｆ　Ｔｈｅｒｍａｌ　ａｎｄ　Ｆｌｕｉｄ　ＳｃｉｅｎｃｅｓＪＯＵＲＮＡＬＯＦＴＨＥＲＭＡＬＳＣＩＥＮＣＥ（ＪＴＳ）ＩｎｔｅｒｎａｔｉｏｎａｌＪ...     

ASME的组织机构和出版物（E95,A95）

本文结合新版本的ＡＳＭＥ规范（Ｅ９５、Ａ９５）及ＡＳＭＥ协作网讯，简要介绍ＡＳＭＥ的组织机构、主要活动内容、出版物和联机检索等概况。     

ASME规范材料的应用及其国产化问题

ＡＳＭＥ规范产品在我厂已占主导地位，在制造中大量使用ＡＳＭＥ规范材料，本文针对ＡＳＭＥ规范材料应用概况、标准特点及其国产化等方面进行论述，对我厂使用ＡＳＭＥ规范材料进行较系统的总结。     

ASME规范钢材国产化展望

在我国深化改革、发展市场经济的大好形势下，为了参与国内、国际市场的竞争，国内许多锅炉压力容器制造厂纷纷引进ＡＳＭＥ规范产品技术和取得ＡＳＭＥ认证，这对我国生产制造ＡＳＭＥ规范产品并参加国际市场竞争创造了条件。ＡＳＭＥ规范产品打入国内、国外市场，前景广阔，市场需求潜力很大。这就要求制造ＡＳＭＥ规范产品的材料由过去单一国外进口变为国内钢厂生产，以国内生产的ＡＳＭＥ材料替代进口才能取得市场效益，故材料国     

变频调速器在三化合成氨厂的应用

我厂从第二套尿素装置开始应用变频调速器 ,效果显著。随后不断将这一先进的调速装置应用到生产领域。一 喷头装置 4台 :ＦＲＮ5 5Ｇ9Ｓ 4ＣＥ 5 5ｋＷ 2台 ;ＦＲＮ7 5ＰＧＳ 4ＪＥ 7 5ｋＷ 2台。二 煤气炉炉条机 8台 :ＦＲＮ15Ｐ9Ｓ 4ＪＥ 15ｋＷ 8台。三 二甲泵 1台 :ＦＲＮ11Ｐ9Ｓ 4ＪＥ 11ｋＷ。四 液氨泵 5台 :ＦＲＮ2 80Ｐ9Ｓ 4ＪＥ 2 80ｋＷ 2台 ;ＦＲＮ110Ｐ9Ｓ 4ＪＥ　 110ｋＷ　 2台 ;ＦＲＮ55Ｐ9Ｓ - 4ＪＥ 55ｋＷ 1台。五 甲胺泵 3台 :ＦＲＮ55Ｐ9Ｓ - 4ＪＥ55ｋＷ 2台 ;ＦＲＮ132Ｐ9Ｓ 4ＪＥ 132ｋＷ 1台。总容量为 12 34…     

用低压油伺服系统的常熟电厂#2机国产300MW汽轮机DEH、MEH控制系统改造成功

常熟电厂#2机的ＤＣＳ系统改造工程于今年年初完成,起动冲转后38小时并网发电,半个月内自动投入率达100%,接着顺利地投入了ＡＧＣ(电网自动调度)运行,并连续运行58天,达到了电力系统300ＭＷ机组大修后连续正常运行50天的达标水平。常熟电厂ＤＣＳ由8个子系统组成,它们是:ＣＣＳ、ＤＡＳ、ＦＳＳＳ、ＳＣＳ、ＤＥＨ、ＭＥＨ、ＢＢＰＳ、ＴＢＰＳ。ＤＣＳ采用统一的ＦＯＸＢＯＲＯＩ/Ａ’Ｓ系列硬件,由上海ＦＯＸＢＯＲＯ公司成套提供。其中ＤＥＨ,ＭＥＨ采用ＦＯＸＢＯＲＯ公司的三个标准机柜,加上由上海汽轮机有限公司完成的ＤＥＨ,ＭＥＨ应…     

The energy storage mathematical models for simulation and comprehensive analysis of power system dynamics: A review. Part i

Energy storage systems are increasingly used as part of electric power systems to solve various problems of power supply reliability. With increasing power of the energy storage systems and the share of their use in electric power systems, their influence on operation modes and transient processes becomes significant. In this case, there is a need to take into account their properties in mathematical models of real dimension power systems in the study of various operation modes, design, etc. In this article the main types of energy storage devices, as well as the fields and applications of their use in electric power systems are considered. The principles of realization of detailed mathematical models, principles of their control systems are described for the presented types of energy storage systems. The article is an overview and can help in choosing a mathematical model of energy storage system to solve the necessary tasks in the mathematical modeling of storage systems in electric power systems.Information is presented on large hydrogen energy storage units for use in the power system.     

Application of Exergoeconomics to the Analysis and Optimization of Process Systems

ＡｐｐｌｉｃａｔｉｏｎｏｆＥｘｅｒｇｏｅｃｏｎｏｍｉｃｓｔｏｔｈｅＡｎａｌｙｓｉｓａｎｄＯｐｔｉｍｉｚａｔｉｏｎｏｆＰｒｏｃｅｓｓＳｙｓｔｅｍｓＡｐｐｌｉｃａｔｉｏｎｏｆＥｘｅｒｇｏｅｃｏｎｏｍｉｃｓｔｏｔｈｅＡｎａｌｙｓｉｓａｎｄＯｐｔｉｍｉｚａｔ...     

Optimal temperature control of solar heating systems

Temperature control systems based on solar and wind energy differ in two important ways from existing fossil fuel systems. One is that solar systems, at least active solar systems, all have some kind of energy storage, the other is that the source of energy in a solar and wind energy system is variable and uncontrollable. Because of these added complications and the high capital investment required for solar and wind energy systems, considerably more sophisticated techniques are required for the design of those systems. In this study, a new technique is applied to the optimal control problem of solar heating systems.     

Energy balance of solar absorption and vapour compression cooling systems

Solar absorption cooling systems are viewed as potential alternatives to fossil-fuel-based conventional cooling systems. This view is investigated in this paper from the point of view of the energy balance of solar absorption and conventional systems. The paper investigates the primary energy needs of three cooling systems; dry and wet cooled vapour compression systems and wet cooled solar absorption. The sources of energy demand in the three systems are identified and their primary energy needs determined. The paper, then, investigates the conditions under which the energy inputs to the solar system breaks even with the other two systems. The investigation is conducted with particular reference to the operational and environmental conditions in Kuwait.     

Net energy analysis of solar and conventional domestic hot water systems in Melbourne, Australia

It is commonly assumed that solar hot water systems save energy and reduce greenhouse gas emissions. The net energy requirement of solar hot water systems has rarely been analysed, including their embodied energy. The extent to which solar hot water systems save energy compared to conventional systems in Melbourne, Australia, is shown through a comparative net energy analysis. It was shown that the embodied energy component of the net energy requirement of solar and conventional hot water systems was insignificant. The solar hot water systems provided a net energy saving compared to the conventional systems after 0.5–2 years, for electric- and gas-boosted systems respectively.     

Potential application of solar thermal systems for hot water production in Hong Kong

This paper presents the evaluation results of conventional solar water heater (SWH) systems and solar assisted heat pump (SAHP) systems for hot water production in Hong Kong. An economic comparison and global warming impact analysis are conducted among the two kinds of solar thermal systems and traditional water heating systems (i.e. electric water heaters and towngas water heaters). The economic comparison results show that solar thermal systems have greater economic benefits than traditional water heating systems. In addition, conventional SWH systems are comparable with the SAHP systems when solar fractions are above 50%. Besides, analysis on the sensitivity of the total equivalent warming impact (TEWI) indicates that the towngas boosted SWH system has the greatest potential in greenhouse gas emission reduction with various solar collector areas and the electricity boosted SWH system has the comparative TEWI with the SAHP systems if its solar fraction is above 50%. As for SAHP systems, the solar assisted air source heat pump (SA-ASHP) system has the least global warming impact. Based on all investigation results, suggestions are given on the selection of solar thermal systems for applications in Hong Kong.     

Performance of commercially available solar and heat pump water heaters

Many countries are using policy incentives to encourage the adoption of energy-efficient hot water heating as a means of reducing greenhouse gas emissions. Such policies rely heavily on assumed performance factors for such systems. In-situ performance data for solar and heat pump hot water systems, however, are not copious in the literature. Otago University has been testing some systems available in New Zealand for a number of years. The results obtained are compared to international studies of in-situ performance of solar hot water systems and heat pump hot water systems, by converting the results from the international studies into a single index suitable for both solar and heat pump systems (COP). Variability in the international data is investigated as well as comparisons to model results. The conclusions suggest that there is not too much difference in performance between solar systems that have a permanently connected electric boost backup and heat pump systems over a wide range of environmental temperatures. The energy payback time was also calculated for electric boost solar flat plate systems as a function of both COP and hot water usage for a given value of embodied energy. The calculations generally bode well for solar systems but ensuring adequate system performance is paramount. In addition, such systems generally favour high usage rates to obtain good energy payback times.     

Time integrated calculation of the insolation collected by a reflector-collector system

A performance and cost model for a variety of wind powered space and water heating systems for single family residences is presented. In addition to wind powered systems, combined wind and solar systems are modeled and compared to conventional and solar only heating systems. Analytical results are presented for a site in Amherst, Massachusetts. System capital economic details include an itemized cost breakdown of the wind heating system components. The results demonstrate that wind powered systems are presently competitive with electric based heating systems and will be competitive with oil or gas systems in the future.     

Analytical performance and economic evaluation of residential wind or wind and solar powered heating systems

A performance and cost model for a variety of wind powered space and water heating systems for single family residences is presented. In addition to wind powered systems, combined wind and solar systems are modeled and compared to conventional and solar only heating systems. Analytical results are presented for a site in Amherst, Massachusetts. System capital economic details include an itemized cost breakdown of the wind heating system components. The results demonstrate that wind powered systems are presently competitive with electric based heating systems and will be competitive with oil or gas systems in the future.     

Performance analyses of sensible heat storage systems for thermal applications

In this paper, sensible heat storage (SHS) systems and performance evaluation techniques are studied. A detailed investigation is presented of the availability of SHS techniques for solar thermal applications, selection criteria for SHS systems, the economics of SHS systems, the main issues in evaluating SHS systems, the viability of SHS systems, the environmental impacts of SHS systems and criteria for SHS feasibility studies, as well as energy saving options. In addition to energy and exergy analyses, several definitions of energy and exergy efficiency for the performance of SHS systems are provided with an illustrative example. © 1997 John Wiley & Sons, Ltd.