寒冷地区某办公建筑利用变频多联机系统供热的能耗模拟

对寒冷地区某办公建筑,利用Dest能耗模拟软件计算冬季建筑逐时热负荷,并设计变频多联机(VRV)空调系统。利用推导出的VRV系统冬季能耗的计算公式,模拟VRV系统的冬季供热能耗。结果表明采用VRV系统的冬季供热费用低于集中供热费用。     

VRV空调系统的设计与思考

依据变频多联空调系统的设计实践,分析了对VRV空调技术的误解,提出VRV空调系统的设计理念。     

变频空调系统的设计与思考

依据变频多联空调系统的设计实践,分析了对VRV空调技术的误解,提出了VRV空调系统的设计理念.     

VRV空调系统的节能性研究与应用

介绍VRV空调系统的特点及发展状况,特别从传热介质、设计理念创新等不同角度分析了该系统的运行节能因素,并且对变频控制热泵式VRV空调系统的节能性能和冬、夏季的运行特性作了一系列实验研究,从而分析了影响室内机制冷量、制热量以及室外机组功率的因素。通过具体的实例分析,对VRV空调系统与常规的空调系统在节能性能方面进行了比较,最后提出了该系统有待解决的一些问题,并对这种系统产品的应用与前景进行了简单的阐述。     

变频控制热泵式VRV空调机组运行特性与节能性能实验研究

本文对变频控制热泵式VRV空调系统冬夏季运行特性和节能性能作了一系列实验研究，分析了影响室内机制冷(热)量、机组功率的因素，得到了VRV空调系统的部分负荷运转特性，并在节能性能方面与普通风冷热泵冷热水机组作了比较，证明该空调机组比普通风冷热泵冷热水机组节能。     

VRV空调系统的节能性研究与应用

介绍VRV空调系统的特点及发展状况,特别从传热介质、设计理念创新等不同的角度分析该系统的运行节能因素,并且对变频控制热泵式VRV空调系统的节能性能和冬季、夏季的运行特性作了一系列实验研究,从而分析影响室内机制冷量、制热量以及室外机组功率的因素。通过具体的实例分析,对VRV空调系统与常规的空调系统在节能性能方面进行比较,最后提出该系统有待解决的一些问题,并对这种系统产品的应用与前景进行简单的阐述。     

水冷（热）变频多联空调系统的全年能耗模拟和分析

为评价该空调系统的全年能耗特征,在已开发的嵌入建筑能耗动态模拟软件EnergyPlus中的制冷模式仿真模块的基础上,开发了水冷(热)VRF系统的制热模式能耗计算模块.在简化的典型商业建筑模型基础上,与已有的常见的空调系统作了全年能耗仿真比较.结果表明:在该文的算例中,水冷(热)VRF系统与中央空调系统相比,在上海冬季耗能较大的气候条件下,全年能耗接近;在广州冬季耗能较小的气候条件下,全年可节能23％.     

变频控制VRV空调系统热回收系列及其节能性分析

本文主要介绍了变频控制VRV空调系统热回收系列空调器的形式、运行方式和特点,并对其节能性作了分析。     

空调冷冻水泵变频能耗特性的研究

通过分析冷冻水管路特性随空调负荷变化的特点 ,得出了计算空调冷冻水泵变频调速运行总能耗的一般关系式。研究表明 ,在中央空调系统中 ,由于冷冻水管路特性曲线随空调负荷而变化 ,在确定水泵变频调速运行的能耗时已不能直接应用泵的相似定律 ;变频冷冻水泵的能耗并不与转速或流量的三次方成正比 ,而是与空调负荷、空调用户的流量分配及空调用户的位置等有关。     

上海某历史性建筑空调通风系统设计

介绍了上海某历史性建筑因使用功能的改变而进行的加设空调系统的工程设计。采用VRV变频控制式空调系统，分为五个区域进行控制，对每个区域的系统进行了介绍，特别是对于隐蔽的空调系统安装施工情况进行了比较详细的分析。总结了该工程的特点及历史性建筑空调系统设计需要注意的问题，并介绍了该系统的建筑情况及设计要求。     

预制舱类工业建筑能耗模拟软件PCES的设计与开发

  [目的]  建筑能耗模拟软件是建筑节能设计与建筑能耗评估重要的支持工具,而现行的建筑能耗模拟软件难以满足预制舱类工业建筑能耗分析及机柜级微环境控制设计的需求。  [方法]  提出了预制舱类建筑热平衡模型,基于该物理模型开发出预制舱类建筑能耗计算软件PCES,通过工程案例证明了PCES能客观地反映建筑物的能耗分布规律。  [结果]  计算表明:PCES可以实现对预制舱建筑围护结构、舱内热状况以及机柜级热环境状况进行求解,适用于工程节能设计与能耗分析。  [结论]  研究成果可实现建筑参数设定、能耗模拟与建筑热过程及能耗分析。     

The energy consumption performance of roof lawn gardens in Thailand

Statistics have confirmed that a lawn placed on a roof top can reduce the cooling load. In this study, the VISUAL DOE 4.0 energy simulation program was used to determine the effects of roof lawn gardens (RLG) on the annual energy required for cooling, and annual electrical usage in an experimental model. The overall heat transfer coefficient (U-Value) of the RLG was estimated by using data from site measurements and the effect of the RLG on the building’s energy consumption was calculated by the simulation program. The effect of different thicknesses of soil was also investigated. From the field measurements, it was confirmed that the RLG could reduce building heat gain. Thus, an experiment was set up to find the energy benefits of the RLG. With evaporative cooling by the RLG, it was found that the consumption of energy in a building with a RLG with 0.20 m of soil was 37.11% less than in a building with a bare roof surface (without evaporative cooling). Moreover, a building with 0.10 m of soil in the RLG consumed 31.07% less energy than a building with a bare roof surface. The results show that an increase in the thickness of the soil layer reduces the building energy consumption.     

南京地区窗户的传热系数和窗墙比对住宅能耗的影响

使用清华大学研发的建筑能耗模拟软件DeST,对南京地区某典型住宅进行动态能耗模拟,分析了不同窗户传热系数和窗墙比对住宅能耗的影响规律,得出南京地区住宅类建筑节能中的一些注意点。     

Cold Storage Capacity for Solar Air-Conditioning in Office Buildings in Different Climates

The building sector accounts for more than 40% of the global energy consumption. This consumption may be lowered by reducing building energy requirements and using renewable energy in building energy supply systems. Solar air-conditioning systems(SACS) are a promising solution for the reduction of conventional energy in buildings. The storage, especially the cold storage, plays an important role in SACS for unstable solar irradiation. In this paper, we took the absorption refrigerating unit as an example, and the solar air-conditioning system of an office building in Beijing was simulated. The accuracy of this model was verified by comparing with the SACS operation data. Moreover, based on the simulation data, the cold storage capacity of the solar air-conditioning system in different climatic regions was studied. The cold storage capacities of SACS in 20 cities distributed in different climate regions were studied systematically. The results simulated by our proposed model will be beneficial to the SACS design, and will enlarge the application of SACS.     

某办公楼动态能耗模拟与节能分析

以eQUEST能耗模拟软件为工具,为重庆市某办公楼建立了能耗仿真模型,分析了空调设定温度、制冷机COP值、室内照明密度对能耗的影响,并对三者相应的节能潜力进行了比较分析。结果表明,建筑电耗随照明密度的减小线性降低,照明密度对建筑节能有着巨大的影响。     

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.     

城市建筑冷热电能源提供模式的探讨

21世纪能源以及环境问题已经成为了各国的头等问题。我国建筑耗能的数字非常惊人：在建造和使用过程中直接消耗的能源占全社会总能耗的20%。根据发达国家的发展经验,这一比例将逐步提高35%左右,建筑能耗极有可能在不远的将来成为我国第一耗能大户。本文介绍了城市建筑中提供冷热电能量的四种方式。结合作者自身能源审计的经验比较了传统的中央空调加锅炉供能系统、分布式三联供系统以及地源热泵、太阳能供能的新能源供给系统的能效与减排量。得出了传统的能源供给系统虽然操作简单但是比较耗能而且排出的有害气体较多,三联供系统受天然气价格影响偏大,太阳能、地热能如不受限制应该尽可能运用的结论。最后笔者提出了我国建筑节能的设计方法以及发展前景。     

Energy simulation modeling and savings analysis of load sharing between house and office

This paper presents the potential benefits of the thermal load sharing between the two different building types such as residential house and commercial office building through the process of energy simulation modeling. Both the house and office simulation models have the same geometries with the conditioned spaces of 200 m² each for the weather conditions of Seoul, South Korea. This study shows and analyzes the thermal energy demand and consumption results simulated from the four different scenarios using the EnergyPlus V6.0 thermal simulation program; i.e., Case-1) a house with conventional heating and cooling systems, Case-2) an office with conventional heating and cooling systems, and Case-3) a simple sum of the two cases (i.g., Case-2 + Case-3), and Case-4) a load sharing model that provides heating and cooling to both the house and the office using combined HVAC systems. This paper evaluates the thermal energy consumption patterns and potential benefits of the load sharing system compared to the conventional systems. The optimal system configurations of the load sharing systems are proposed. In conclusion, this paper discusses the potential issues and challenges for implementing the load sharing systems as well as the possible solutions for these issues.