啤酒厂糖化楼采暖设计

１概述就暖通行业来讲，热水采暖取代蒸汽采暖已成为一种不可逆转的趋势。但由于历史和经济的原因，一些老企业至今仍沿用蒸汽采暖系统。这类企业一旦新上基建项目，采暖热媒的矛盾就产生了。实现热水采暖通常需要设置一个热交换站。下面就我院完成的某啤酒厂糖化楼的采暖...     

某啤酒厂糖化楼采暖设计

本文结合工程实例,就目前采用蒸汽采暖的老企业新建项目的采暖设计作了初步的探索和尝试.     

边防哨楼太阳能采暖

边防哨楼太阳能采暖裴清清，张国强我国新疆地区冬季十分寒冷。利用太阳能采暖改善边防哨楼的温度环境很有意义。哨楼高度为２０ｍ，四层建筑，其平面为边长２ｍ的人边形结构。一、二、三层层高５．６ｍ，使用而积为３ｍ×１７．４４ｍ，四楼为观察室，层高３ｍ，使用面积...     

潍坊市建成被动式太阳能采暖楼

去年,山东省潍坊市建成了一座波动式太阳能宿含楼,它的面积达2026米~2,系目前我国规模最大的民用太阳房。太阳房为三单元五层楼房,砖混结构,采用珍珠岩墙皮等多种新材料、新工艺,建筑中安装了太阳能集热     

啤酒厂麦汁冷却系统的节能

本文介绍啤酒厂热麦汁冷却系统采用氮一段冷却工艺来代替两段冷却工艺，可节电、节煤、节水、节省酒精，经济效益和社会效益明显，按年产５万吨啤酒厂计算，每年节约的费用超过３２万元。     

啤酒厂麦汁冷却节能技术改造

介绍了啤酒生产中热麦汁冷却工艺由二段法改为一段法的工艺流程,并根据热平衡原理计算出其节电、节水、节煤等节能效果。经6年多的实践证明,该技改产生了显著的经济效益。     

啤酒厂发酵罐冷却系统的节能

本文介绍发酵罐用氨冷却工艺来代替酒精水冷却工艺，可节省能耗20％以上，具有很好的经济效益。还简要介绍氨在夹套内换热的原理和对夹套设计的要求。     

蒸汽采暖改热水采暖的尝试

介绍了蒸汽采暖改为高温热水采暖系统的管路设计、改造、加热方式及系统的调试运行。实践证明,蒸汽采暖改为高温热水采暖切实可行。     

楼宇冷热电联供系统的产品成本分摊

处理多产品系统的成本分摊问题，是运用热经济学方法分析能量系统的关键环节之一。本文较详细的分析了现有的热电联供系统成本分摊方法，并分别运用作功能力法以及在作功能力法基础上得出的“等效折算法”分摊了楼字冷热电联供(BCHP)系统热电之间的成本，并在此基础上进一步计算制冷部分的成本。通过将联供带来的好处合理分配给冷热电三部分，有效解决了三联供系统的成本分摊问题，并对一实际的BCHP系统进行了分析，给出了结论。     

Solar-assisted heat pump system and in-ground energy storage in a school building

An experimental solar-assisted heat pump system with a hybrid ground-coupled storage at the F.U.L. in Arlon, Belgium, is described. It includes a 382 m² solar roof, two types of water storages, heat storage in earth by horizontal exchangers, and heat pumps. One operating period (1984–1985) is analyzed. The data processed has shown that each of the subsystems has apparently performed adequately: annual collector efficiency is 0.41, heat pump C.O.P. range around 4. Despite important energy losses from the underground storage, the storage efficiency reaches 0.7. This effectiveness is mainly due to heat recovery below natural soil temperature and also to the use of buried tanks for short-term storage. The main difficulties are controlling the flow between these subsystems and developing an operating strategy that matches both the building's heat requirements and a good solar fraction.     

Free cooling of a building using PCM heat storage integrated into the ventilation system

This article presents a study of the free cooling of a low-energy building using a latent-heat thermal energy storage (LHTES) device integrated into a mechanical ventilation system. The cylindrical LHTES device was filled with spheres of encapsulated RT20 paraffin, a phase-change material (PCM). A numerical model of the LHTES was developed to identify the parameters that have an influence on the LHTES’s thermal response, to determine the optimum phase-change temperature and to form the LHTES’s temperature-response function. The last of these defines the LHTES’s outlet-air temperature for a periodic variation of the inlet ambient-air temperature and the defined operating conditions. The temperature-response function was then integrated into the TRNSYS building thermal response model. Numerical simulations showed that a PCM with a melting temperature between 20 and 22 °C is the most suitable for free cooling in the case of a continental climate. The analyses of the temperatures in a low-energy building showed that free cooling with an LHTES is an effective cooling technique. Suitable thermal comfort conditions in the presented case-study building could be achieved using an LHTES with 6.4 kg of PCM per square metre of floor area.     

Cooling performance of a vertical ground-coupled heat pump system installed in a school building

This paper presents the cooling performance of a water-to-refrigerant type ground heat source heat pump system (GSHP) installed in a school building in Korea. The evaluation of the cooling performance has been conducted under the actual operation of GSHP system in the summer of year 2007. Ten heat pump units with the capacity of 10 HP each were installed in the building. Also, a closed vertical typed-ground heat exchanger with 24 boreholes of 175 m in depth was constructed for the GSHP system. To analyze the cooling performance of the GSHP system, we monitored various operating conditions, including the outdoor temperature, the ground temperature, and the water temperature of inlet and outlet of the ground heat exchanger. Simultaneously, the cooling capacity and the input power were evaluated to determine the cooling performance of the GSHP system. The average cooling coefficient of performance (COP) and overall COP of the GSHP system were found to be ～8.3 and ～5.9 at 65% partial load condition, respectively. While the air source heat pump (ASHP) system, which has the same capacity with the GSHP system, was found to have the average COP of ～3.9 and overall COP of ～3.4, implying that the GSHP system is more efficient than the ASHP system due to its lower temperature of condenser.     

安溪地热引水工程效益评述

地热能直接开发利用 ,是各国地热科学工作者重点研究探索的问题之一。 1993年 1月福建省安溪县首次将 2 1 5ｋｍ外的温泉水引进城关 ,成为我国规模最大、输水距离最长的地热引水工程。它填补了我国地热能开发利用的一项空白。该项工程建成投产 ,彻底改变了县城居民长期依靠燃煤锅炉和电加热器供应生活热水的传统 ,对改善县城投资环境 ,吸引外资 ,发展外向型经济作出贡献 ;对发展旅游 ,医疗保健事业 ,促进第三产业和房地产业发展 ,起到了良好的示范作用。同时对于节约和代替常规能源 ,减少环境污染等方面具有重要意义 ,其经济效益、环境效益…     

Simulation of the thermal performance of a hybrid solar-assisted ground-source heat pump system in a school building

A hybrid solar-assisted ground-source heat pump (SAGSHP) system was designed, in the frame of an energy upgrade study, to serve as a heating system in a school building in Greece. The main scope of this study was to examine techniques to reduce the capacity of the heating equipment and to keep the primary energy consumption low. Simulations of the thermal performance of both the building and of five different heating system configurations were performed by using the TRNSYS software. The results are presented in this work and show that the hybrid SAGSHP system displays the lower primary energy consumption among the systems examined. A conventional ground-source heat pump system has the same primary energy consumption, while the heat pump’s capacity is double and the ground heat exchanger 2.5 times longer. This work also highlights the contribution of simulation tools to the design of complex heating systems with renewable energy sources.     

建筑外窗对采暖热负荷的影响分析

以天津市某三层办公楼一层办公室南向外窗为研究对象,通过计算整个采暖季南向外窗的逐时累计得热量及失热量,分析不同类型窗对于整个采暖季累积采暖热负荷的影响.     

An investigation of the heat pump performance and ground temperature of a piled foundation heat exchanger system for a residential building

Novel methods are sought to provide greater efficiency of the installation of ground heat exchangers for GSHPs (ground source heat pumps) in domestic buildings. An economically viable option is to utilise concrete foundation piles as ground heat exchangers. The objective of this study is to investigate the operation of utilising a piled foundation structure as a ground heat exchanger. A test plot of 72 m² (ground floor area) was produced with 21 × 10 m deep concrete piles, with a single U tube pipe in each. Ground heat was extracted by a heat pump with the heat loading being varied in line with the date and the average air temperature. Over the 2007/2008 heating season this study had investigated the temperature changes in the foundation piles and the surrounding ground in addition to the heat pump operational performance. The temperature changes observed in the region of the test plot were compared with variations naturally experienced in the ground due to the seasonal climatic influence. The SPF (seasonal performance factor) of the heat pump was 3.62 and the ground temperature at a distance of 5 m from the test plot was seen to be undisturbed by the heat extraction and followed the predicted seasonal variation.     

Modeling of natural convection and radiative heat transfer in inclined thermosyphon system installed in the roof of a building

Some construction laws require the integration of an open thermosyphon system having multiple functions to the building roof. In order to analyze the efficiency of this system, a numerical model was developed. This model is based on the study of the natural convection coupled with radiative heat transfer in an inclined air channel. Two configurations are studied, the first one is a simple channel formed by two parallel plates and the second one is equipped with fin blades joined to the upper plate. The air flow in the channel which is due to the buoyancy forces is fully turbulent and the turbulence was modeled using the k‐ε model. Some numerical results obtained were validated using the experimental ones of Khedari et al. (2002) and those of Nouanégué and Bilgen (2009). The effect of the radiative heat transfer on the mean Nusselt number was shown. Correlations for Nusselt numbers were obtained for the two configurations as functions of the geometric parameters and the Rayleigh number. The main objective of this study is to use these correlations in other models to facilitate the operation of this system     

热管太阳能集热器系统的研究

建筑物大面积集中供热已成为节能降耗的新,也是太阳能热利用发展的趋势。文章介绍了在原有铜铝复合板的基础上,试制的一种结合多层建筑的集中供热热管式太阳能供热系统,克服了原有的平板式和真空管式集热系统易炸管,易冻裂及结垢,单管损坏后整个系统失效等问题。