中央空调水循环系统变频节能控制

空调水系统能耗在整个空调系统中占有很大的比例,所以,对空调水系统进行节能研究具有重要意义。实践证明,运用变频控制技术的变频空调,可以实现快速、节能和舒适控温的效果。论文首先分析了空调水系统的组成及其工作原理,并探讨了冷水变流量的控制节能控制,最后使水泵工作在高效率区域的一些关键设计提出了一些建议。     

变频控制技术在中央空调水系统中的应用

对变频控制技术在中央空调水系统中的应用进行了分析和探讨,认为对冷媒水泵和冷却水泵采用变频控制能起到显著的节能效果。变频控制技术在冷媒水二次泵及高层建筑高区空调水系统中的应用值得推广;在一次泵冷媒水系统和冷却水系统中的应用也是可行的,但需针对工程的具体情况进行精心设计,才能既达到应有的节能效果,又保证空调系统和设备的安全运行。     

变频控制技术在中央室调水系统中的应用

对变频控制技术在中央空调水系统中的应用进行了分析和探讨，认为对冷媒水泵和冷却水泵采用变频控制能起到显著的节能效果。变频控制技术在冷媒水二次泵及高层建筑高区空调水系统中的应用值得推广；在一次泵冷媒水系统和冷却水系统中的应用也是可行的，但需针对工程的具体情况进行精心设计，才能既达到应有的节能效果，又保证空调系统和设备的安全运行。     

南京青奥中心暖通空调系统节能设计

介绍了南京青奥中心项目暖通空调系统设计采取的主要节能措施,重点对空调冷热源方案进行了节能性对比分析,阐述了在主要设备选型,超高层塔楼空调水系统分区,空调水系统运行等环节节能设计的考虑,并介绍了热回收,分层空调,全新风运行等节能措施在该项目中的应用。     

浙江商会大厦空调设计

介绍了浙江商会大厦空调冷热源、空调风系统及水系统的设计,计算分析了转轮全热回收机组的节能性,讨论了大厦空调水系统分区及水系统压力分布以及回收冷凝水作为冷却塔补水.     

在变风量空调系统中应用变频调速技术的节能分析

本文简要介绍了变风量空调系统的控制方法和变频控制技术的节能,对变风量空调系统中变频控制技术的应用进行分析,并阐述了变频控制器实际应用的优缺点.     

大温差空调水系统的节能评价方法

通过分析影响大温差空调水系统节能性的各种因素,得出判断采用大温差空调水系统是否节能的计算方法和评价标准。以空调系统的典型工况参数为例,计算出不同工况条件下冷水机组COP的临界相对变化率,得出结论:只有COP的相对变化率小于临界相对变化率时,大温差系统才具有节能效果。     

浅析变频控制技术在空调通风系统中的节能应用

随着我国城市化进程的全面推进,建筑物的空调通风系统也日趋完善,为建筑的使用者提供了更加良好的居住环境。而随着时代的发展,科技的进步,变频控制技术也应运而生,以其先进的控制方式和节能优势在空调通风系统之中得到了较为广泛的应用。对变频控制技术做研究,能够使空调通风系统更具有节能性和经济性,提升通风系统的稳定性和安全性。     

基于冷热量平衡的中央空调系统水力平衡控制调节

介绍了中央空调系统水力平衡与水力失调的概念及空调管路系统,针对中央空调系统中水力失调的现状,提出区域动态水力均衡控制技术在实际中央空调系统项目中达到10%~20%的节能率,节能效果显著的同时也提高了空调系统的舒适性。     

公共建筑空调系统节能控制技术应用研究

空调系统是智能建筑的重要组成部分，在空调系统运行的过程中，对电量的需求较大。我国的大部分空调系统没有得到有效的监管的控制，这就使空调控制系统形同虚设，不能起到节约能耗的作用。本文针对我国公共建筑空调系统的现状、主要的节能控制技术和节能控制技术的应用进行研究。     

住宅建筑暖通空调系统设计探究

本文就在设计工作中暖通空调系统在居住建筑节能设计中的存在的问题、建筑专业对暖通系统的影响等方面进行了分析,对提高居住建筑暖通空调系统的节能运行效率、加大在此类建筑中暖通系统节能技术的应用提出了相关建议。     

Application of an energy management and control system to assess the potential of different control strategies in HVAC systems

The significant and continuous increment in the global electricity consumption is asking for energy saving strategies. Efficient control for heating, ventilation and air-conditioning systems (HVAC) is the most cost-effective way to minimize the use of energy in buildings. In this framework, an energy management and control system (EMCS) has been developed to schedule electricity end-uses in the campus of the Universidad Politécnica de Valencia (UPV), Spain. This paper presents an evaluation performed by using the EMCS of different control strategies for HVAC split systems. It analyzed the effect of different schedules for a common air-conditioning device and demand response strategies are tested in several situations. The economic saving is calculated taking into account the electricity contract clauses. Finally, a test is made for the control of a group of similar devices in order to reduce the maximum peak power in consumption and to obtain a flexible load shape with the HVAC loads. The studies are then extrapolated to a larger system, the whole University campus, for which energy and economic savings are quantified.     

暖通空调系统节能设计思考

暖通空调系统能耗是建筑能耗的主要组成部分,但以往的暖通空调设计多仅着眼于功能而忽略节能。通过多个案例分析指出了基于节能考虑的设计认识误区,提出了值得重视的若干节能设计理念,探讨了基于节能的暖通空调系统方案设计方法。     

暖通空调节能设计探究

改革开放以来,我国的经济高速发展,与此同时,各类能源被大最消耗,所以对于我国来说节能具有重大的意义。而目前,建筑能耗在我国的整体能耗中所。叶的比例比较大,而其中暖通空调系统则义可以说是建筑能耗中的主要耗能之一,所以实现暖通空调的节能具有非常重要的意义。木文我们将通过对暖通空调系统中节能的一些主要途径的研究,指出暖通卒调的节能设计方面中存在的一些主要问题并进行分析,提出了暖通空调节能设计的具体措施,这对降低暖通空调系统中的能耗,提高能量的使用效益具有积极有效的促进作用。     

空调系统节能改造技术措施分析

本文探讨了空调系统节能改造中具有较好投资回报期的措施,包括风机盘管改造与控制、过渡季节空调箱利用新风供冷、空调系统区域控制、冷冻水变水量控制以及制冷主机改造。     

Evaluating performance indices of a shopping centre and implementing HVAC control principles to minimize energy usage

Heating, ventilating and air-conditioning (HVAC) systems in buildings must be integrated with an efficient control scheme to maintain comfort under any load conditions. Efficient HVAC control is often the most cost-effective option to improve the energy efficiency of a building. However, HVAC processes are non-linear, and characteristics change on a seasonal basis so the effect of changing the control strategy is usually difficult to predict. The present study aims to reduce energy consumption by defining new HVAC control strategies and tuning control loops in a shopping centre. First, an energy audit was performed to investigate the potential for energy savings and to redefine the control scenarios, while a methodology for the shopping centre was developed. Performance indices were then calculated and compared with the yardsticks. Next, normalised performance indices were computed to reach out a better understanding of the building’s efficiency. Finally, new strategies were implemented with the help of the existing building management system (BMS) and about 22% of energy saving was achieved.     

HVAC system optimization for energy management by evolutionary programming

Energy management of heating, ventilating and air-conditioning (HVAC) systems is a primary concern in building projects, since the energy consumption in electricity has the highest percentage in HVAC among all building services installations and electric appliances. Without sacrifice of thermal comfort, to reset the suitable operating parameters, such as the chilled water temperature and supply air temperature, would have energy saving with immediate effect. For the typical commercial building projects, it is not difficult to acquire the reference settings for efficient operation. However, for some special projects, due to the specific design and control of the HVAC system, conventional settings may not be necessarily energy-efficient in daily operation.In this paper, the simulation-optimization approach was proposed for the effective energy management of HVAC system. Due to the complicated interrelationship of the entire HVAC system, which commonly includes the water side and air side systems, it is necessary to suggest optimum settings for different operations in response to the dynamic cooling loads and changing weather conditions throughout a year. A metaheuristic simulation–EP (evolutionary programming) coupling approach was developed using evolutionary programming, which can effectively handle the discrete, non-linear and highly constrained optimization problems, such as those related to HVAC systems. The effectiveness of this simulation–EP coupling suite was demonstrated through the establishment of a monthly optimum reset scheme for both the chilled water and supply air temperatures of the HVAC installations of a local project. This reset scheme would have a saving potential of about 7% as compared to the existing operational settings, without any extra cost.     

暖通空调节能技术探析

本文对当前暖通空调节能中存在的问题进行了分析,并在此基础上提出了解决建筑暖通空调系统节能问题的技术途径,以期对暖通空调的节能工作能够有所借鉴。     

Analysis on energy saving potential of integrated supermarket HVAC and refrigeration systems using multiple subcoolers

The paper presents a model-based analysis on the energy saving potential of supermarket HVAC (heating, ventilating, and air-conditioning) and refrigeration systems using multiple subcoolers among the high-temperature HVAC system, the medium-temperature refrigeration system, and the low-temperature refrigeration system. The principle of energy reduction is to have the higher COP (coefficient of performance) system generate more cooling capacity to increase the cooling capacity or reduce the power consumption of the lower COP system. The subcooler could be placed between the medium-temperature and low-temperature systems, between the high-temperature and medium-temperature systems, and between the high-temperature and low-temperature systems. All integration scenarios of adding one, two and three subcoolers have been investigated. The energy saving potential varies with the load ratio between high-, medium- and low-temperature systems, COP of three systems, and the “on-off” duty time of HVAC system. The optimal sequence of adding subcoolers is also proposed.     

暖通空调系统的节能问题

暖通空调系统在建筑节能中占据重要的位置,起着重要的作用。节能技术的研究开发和运用是暖通空调系统、建筑系统节能的基础。政府职能部门的重视和支持,是实现大幅度节能,产生显著的环境效益和社会效益,推动经济发展的保证。