日光温室加内保温幕的试验

减少夜间通过前屋面的散热是日光温室节能的关键。文章对室内前屋面下设置保温幕的试验温室(有幕温室)与相同结构的不设保温幕的对比温室(无幕温室)的温度环境进行了测试比较。测试结果显示:内保温幕的设置有效地抑制了夜间通过前屋面由于温差引起的散热,并提高了晴天夜间室内的温度。     

集中供热管道保温厚度优化计算方法探讨

本文从供热管道保温投资效益的角度提出了优化保温层厚度的概念。结合国家最新的保温计算规范,探讨了利用计算机编程优化计算保温层厚度的计算方法,给出了计算机编程计算的计算步骤。这不仅对规划和设计供热管道最佳保温层厚度具有指导意义,而且为利用计算机编程评价供热管道保温的投资经济性和节能效果提供了方向。     

日光温室节能性能的试验分析

发展目光温室蔬菜生产是一条农民致富奔小康之路。为降低成本，增加效益，在果子街镇小西沟村，我们选择不同类型、不同保温方式的4座温室作了试验，进行连续观测记载，结果见附表（3月中旬，温室先后停止加火，表中的室温、地温均为3月下旬的平均温度）．现将有关节能性能作对比分析如下：先看保温性能（揭帘前），同一类型温室三层覆盖比单层保温分别高2．3．C和0．7t，地温也是三层高于单层；相同保温方式，规范型温室比中间型温室分别高1．3℃和29℃，地温也是规范型高于中间型。再看增温性能（揭帝后），规范型温室的室温1／J‘时后就…     

上海某住宅小区项目节能设计介绍

从某项目的规划、单体设计、围护结构的保温设计到采暖、空调和通风设计几方面计算分析了本工程某幢单体的节能效果，并综合分析内保温体系与外保温体系在本工程的详细运用及其节能效果，通过计算分析，选用合适的保温材料与保温方式使本建筑最终实现建筑节能50％的目标。     

散热管道在温室内放热特性的分析

设施农业是我国现代化进程的一个重要内容，现代化温室作为设施农业的标志，正在受到大力发展和重点研究。本论文重点研究温室热水供热系统散热管道的热工性能。论文主要进行了以下工作：1.分析了温室热水供热系统的型式及散热管道的布置方式；2.对温室热水供热系统散热管道的热工性能进行理论分析和计算；3.在密闭小室内，对温室散热管道热工性能进行实际测试，并得出散热管道传热系数的实验公式。     

地热温室供热节能技术的研究

冬季加热是保证温室正常运行的首要条件．文中结合示范工程温室的运行与实地测量，从地热资源、温室结构、采暖管道布置、太阳能的利用及蓄热技术等方面分析了温室供热的节能措施，可为类似地热温室供暖系统节能设计提供一定的参考。     

日光温室内后墙涂白对增加光照强度的应用效果试验

日光温室的光照是冬茬黄瓜增产的重要条件。为增加日光温室的光照强度，应控及反光幕，但因反光幕造价较高，我们采取了在日光温室内后墙涂白措施。经试验，该措施能有效地增加温室内光照强度，提高冬茬黄瓜的产量和效益，具有简便易行的的特点，很值得广大温室蔬菜种植户推广。一、试验方法1．目光温室日光温室要结构合理，保温效果好，室内土壤肥力、土质等均匀一致。温室东西长度32m，南北跨度8．2m。2．试验方法大区试验．不设重复。在温室后墙的东半部用细泥抹平后刷徐大白粉，即后墙涂白；西半部保持墙的原状，作为对照。3．黄瓜栽培…     

农业温室供热系统的研究和设计

农业温室（以下简称温室）是具有必要设备的、能够常年为作物生长和发育提供所需条件的特殊建筑物。温室是一个特殊的生产车间,冬季要供热。结合示范工程温室的设计,着重介绍了温室的型式、覆盖材料、热负荷计算、供热系统形式以及节能运行方式等。     

日光温室热水供热系统

在温室生产过程中，冬季加热是保证温室高效、高质运行的首要条件。由于热水供热方式的供热成本低、运行费用低，易于管理，并且可根据需要在温室内任意布置管道，因此在日光温室加温系统中得到了广泛的应用。文中介绍了日光温室热水供热系统的设计及实例。     

25MW(51-25-1型)纯凝汽式机组冬季供热期间低真空运行调整

分析了51-25-1型汽轮机低真空供热运行的条件、维护方法,介绍了一些运行经验,以及其它类似机组改造时需注意事项,并对节能效果进行粗略计算。     

Assessing heating and cooling demands of closed greenhouse systems in a cold climate

Reducing greenhouse gas emissions by providing non‐fossil fuel energy sources is imminently necessary. The area of particular interest in this paper is the agricultural greenhouse industry. In these structures, significant heating demands are present, especially in cold climates, and are typically met by combusting fossil fuels. In an effort towards a sustainable energy supply, the potential of closed greenhouse systems in a cold climate is explored. In these systems, natural ventilation for cooling and dehumidification is replaced with active systems, and the thermal energy removed can be re‐used, reducing the overall heating demand. A transient greenhouse model is created using TRNSYS software and validated with natural gas usage data from a reference greenhouse. The annual heating and cooling demands, effect of varying cover materials and potential for heat recovery ventilation are explored for the most concentrated greenhouse areas in Canada. Copyright © 2017 John Wiley & Sons, Ltd.     

温室热湿处理技术的发展与比较

叙述了面对极端天气和能源环境危机,温室热湿处理技术发展、应用、研究的现状和特点,比较了各种技术的可操作性、初投资、运行费用、运行效果和节能环保情况,指出了几种传统的温室热湿处理技术和当前农业设施对应用新技术新能源的需求。     

Thermal Regime in Combined Cultivation Constructions

The basic methods of mathematical modeling for thermal engineering calculations of a solar greenhouse in combination with geothermal waters are outlined. The experimental studies and theoretical calculations of the mathematical model are compared. The energy efficiency of the combined use of solar thermal energy and geothermal waters to create a microclimate in the cultivation facilities in the regions of Turkmenistan is generalized. The economic priorities of increasing the volume of agricultural products and the environmental benefits from the use of thermal water in greenhouses in Turkmenistan are given.     

Experimental determination of the overall heat loss coefficient for energy requirement of greenhouse heating

This paper presents an experimental determination of energy requirement for greenhouse heating. The overall heat loss coefficient, heat input, the control factor for air‐tightness, the rate of heat loss and the thermal screen effectiveness were calculated. The relationships between the overall heat loss coefficient and the wind speed, and the outside temperature were modelled, including the measured and calculated values. It was found that the thermal screen effectiveness was 16 and 19.8% for the polyethylene (PE) and polyester screens, respectively. Copyright © 2005 John Wiley & Sons, Ltd.     

光伏发电技术在温室中的应用

温室的高能耗有碍于其发展,引入可再生能源是温室节能减排的有效举措。本文介绍了一种将光伏发电及控制技术应用于温室的方法,太阳电池组件直接安装在温室室顶,通过与市电并联及少量蓄电池配置保证供电可靠性和功率平滑性,并基于无线通信技术实现温室环境因子参数的采集和远程监控。该系统不但能够根据设定目标自动地调节温室内部环境,而且能够监视整个系统的能量流动情况。温室运行结果表明,该系统能够满足冬季温室用电,并部分解决夏季温室用电,大大减少对化石能源的需求,达到节能减排的效果。     

Effect of the greenhouse design on the thermal behavior and microclimate distribution in greenhouses installed under semi‐arid climate

Greenhouse design and cover material properties may strongly impact greenhouse energy. To study the effect of these parameters, three typical unheated agricultural buildings equipped with rows of canopy were considered, and two‐dimensional simulations were conducted using the discrete ordinate model for simulating radiative transfers. Experiments were conducted to establish the boundary conditions and to validate the model. Two parametric studies were carried out: one for the nocturnal period when the energy performance of each type of greenhouse was investigated, and one for the diurnal period, when the sun path was simulated taking into account the type of the cover, its spectral optical and thermal properties. Results indicate that for the diurnal period, and for both plastic greenhouses equipped with fully opened side vents, the air located between the rows of canopy and ground surfaces remained very slow, not exceeding 0.2 m/s; for the Venlo glasshouse, the recirculation loop situated above the crop improved the air mixing and induced a good homogenization. Results also indicate that the cover material with the highest absorptivity, deteriorated the natural ventilation, increasing the air temperature by convection, enhancing local air temperature favoring the development of a secondary recirculation, and reduced the available photosynthetically active radiation. Concerning the nocturnal period, the ambient air temperature in the tunnel and in the vertical wall of the greenhouse was relatively homogenous and warmer than the temperature in the Venlo greenhouse. During the nocturnal period, the plastic greenhouse (in particular the one with the tunnel) performed better in regard to the homogenization of the climate and thermal energy storage.     

区域能源多能互补耦合系统在温室中的应用分析

针对典型温室,利用构建的优化配置模型,进行燃气轮机和内燃机两种区域能源多能互补耦合系统优化配置研究。从经济、能源利用率、环境影响等角度对提出的系统方案进行分析与评价,并与常规供能方案进行比较。结果表明:温室适合推广应用区域能源多能互补耦合供能技术;燃气轮机和内燃机系统均可行,燃气轮机合适的功率为4～4.5 MW,内燃机合适的功率为5～5.5 MW;燃气轮机系统的经济性更好,而内燃机系统在节能减排方面更具优势;在可再生能源利用方面,应优先选择河水、污水处理厂中水等浅表热能资源,其次再考虑地热资源。     

某下送风多功能厅气流组织及节能性的实测与分析

实测了采用下送风空调方式的某多功能厅的温度场和速度场。获得了夏季三种工况下的温度、速度分布及其随时间的变化。评价了该空调房间的节能性以及舒适状况。结果表明,在一定送风量和送风参数下能够满足舒适性要求,且具有较明显的节能效果,通风效率为1.7~3.2。     

Choice of thermal energy system for solar absorption cooling

It is essential to operate a solar vapour absorption cooling system only at design conditionsin order to maximize the saving of conventional electrical energy. The paper deals with the analysis of a solar thermal energy system by coupling the collector field, an auxiliary thermal energy source, the thermal energy reservoir and the generator of the absorption chiller in a single closed loop, thus ensuring optimum performance of the chiller at design conditions. This analysis is preceded by a quasi steady-state analysis for the system without the auxiliary source to obtain the temperature history of the reservoir, the hourly thermal energy availability and the resulting cooling effect. The comparative results of the two systems highlight the importance of auxiliary thermal energy source in mximizing the electrical energy saving. The utility of auxiliary energy input is highly attractive because of its high effective COP and higher equivalent electrical conversion efficiency.