某体育馆风冷热泵机组多种运行工况设计

本工程采用全热回收型风冷热泵及普通型风冷热泵作为夏季集中冷源,全年泳池池水加热热源,过渡季游泳馆通风、供暖系统热源;采用市政热网作为冬季空调、供暖系统热源,同时兼极端天气及泳池一次加热补充热源。该系统全年共涉及7种运行工况,文章介绍了各种工况转换过程。另外本文分析了热泵机组用于泳池加热和补热的经济性与合理性:以热泵技术为基础的一般热泵机组可以考虑用于游泳池池水加热和补热使用。对于寒冷地区,选择性能良好的机组再配出水温度低,冬季大部分时间制热率较高,对于本工程极端天气,考虑由市政热力作为辅助热源,不增设电辅热。     

土壤热源热泵系统节能分析

分析了上海某高级别墅土壤热源热泵系统的设计。采用B IN法计算了别墅全年动态负荷分布、土壤热源热泵系统的全年运行能耗。以风冷热泵系统为参照,综合评价了土壤热源热泵系统的节能效果。     

四管制风冷热泵在夏热冬暖地区恒温泳池的设计应用探讨

以地处夏热冬暖地区的福州某学校文体馆为例,从分析福州市的气候特征、游泳池空调负荷特性及池水恒温需求等方面着手,抓住温湿度控制要点,结合冷凝热回收技术,以四管制风冷热泵为基础构建了高效节能的冷热源系统,并与传统的冷水机组加燃气热水锅炉所构建的冷热源系统进行了分析对比。分析结果表明：在夏热冬暖地区的室内恒温泳池项目中,采用四管制风冷热泵构建的冷热源系统在全年工况的能耗均低于传统的冷水机组加燃气热水锅炉构建的冷热源系统,夏季工况下节能30%以上、减排33.2%以上,冬季工况下节能28.2%以上、减排19.4%以上,该冷热源系统具有良好的推广应用价值。     

热泵热回收机组在宾馆建筑的适用性研究

描述了热泵热回收机组的工作原理,并以上海某宾馆建筑的空调系统改造为实例,对冷水机组加锅炉、风冷热泵加热泵热水机组、冷水机组加热泵热回收机组等三种方案的经济性进行分析,指出热泵热回收机组适合在宾馆建筑中使用。     

几种多效空气源冷水(热泵)机组的探讨

本文介绍了热回收风冷冷水机组、冷回收空气源热水机组、热回收风冷冷水(热泵)机组和空气源冷热水机组的系统流程特点、控制特点和使用功能。     

一种新型空调机组在泳池的应用分析

结合现有游泳馆的能耗现状及负荷特性,介绍了一种新型空调机组——泳池用双级热回收防结露空调机组,并与目前泳池常用的除湿热泵进行了比较,得出其各自的优缺点。结合实际设计的工程项目,计算出二者在满足相同设计要求情况下的能耗数据。结果显示,在夏热冬冷地区,泳池用双级热回收防结露空调机组更具有节能优势。     

热泵热回收结合高热供给酒店生活热水的探讨

针对某酒店管理公司关于空调制冷系统须设有最少一台热回收型冷水机组作为生活热水的预热用途的要求,详细介绍了采用全热回收型风冷热泵并结合电蓄热锅炉作为酒店生活热水系统热源的方案选择情况,根据空调系统机组选型计算了电蓄热锅炉容量,并与传统生活热水热源做了经济技术比较,结果表明采用全热回收风冷热泵结合电蓄热锅炉作为生活热水热源有明显的经济性。     

双热回收空调系统节能性能分析探讨

本文介绍了一种双热回收空调系统,系统集风冷热泵四管制冷热水机组、风冷热泵冷凝热全热回收机组及常规水冷冷水机组三种冷冻主机联合运行,运用冷冻机房群控技术实现多种运行模式的切换,从而实现全面精准的热回收。该空调系统节能效果显著,已成功应用于实际工程中,具有良好的发展前景。     

某政府大楼空调系统技术经济分析

为解决原大楼空调系统冬季采用电加热器作为辅助热源导致能耗过高的缺点，本文提出两种改造方案。方案一在冬季采用风冷热泵作为辅助热源，制备热水进入末端分散的水-空气水源热泵，即采用“双级耦合热泵”的形式向大楼供暖；方案二采用含水层储能系统作为冬季辅助热源和分散热泵系统组成混合系统向大楼供暖，考虑到冬夏季负荷相差太大会对地下含水层产生热影响，夏季采用含水层储能系统和冷却塔联合散热。结果表明：在地下水丰足的冬冷夏热地区，采用与含水层储能系统结合的集中水源——分散热泵空调系统是政府机构大楼适用、经济的空调方案；而在缺水的地区，可采用风冷热泵作为辅助热源的“双级耦合热泵”系统。     

风冷热泵热回收与风冷热泵能量提升机的技术比较

介绍了风冷热泵热回收技术与能量提升机技术在制冷原理上的不同点,提出了冷回收的概念。详细阐述了他们在应用范围、应用地域的不同点,并通过无锡某酒店的设计实例着重介绍了风冷热泵能量提升机技术在酒店四管制水系统中的应用。     

"三集一体"热泵在某游泳池中的应用

本文针对小型室内游泳馆的暖通系统设计,分析了传统室内游泳池常见问题,重点介绍了现代室内恒温游泳池除湿及加热的方法,即根据热泵原理制成的热泵热水机组,在制热保证池水恒温的同时,充分利用热泵回收低位热能(游泳池室内空气的显热和潜热)的特点,对游泳池室内空气进行降温、除湿,达到改善游泳馆室内空间的空气环境的目的,该机组称为"...     

Analysis of indoor environmental conditions and heat pump energy supply systems in indoor swimming pools

For indoor swimming pools, a lot of energy is needed to control the indoor temperature, relative humidity and pool water temperature. Meanwhile, the indoor air contains a high specific enthalpy due to water evaporation. A new heat pump dehumidifier is studied to reduce energy consumption. The most significant feature of this system is that it can not only recover the latent heat from indoor moist air, but also absorb heat from outdoor air to heat the indoor air and pool water. First, indoor environmental conditions, including space parameters and pool temperature, are analyzed based on human thermal comfort and energy saving. Subsequently, the models of heat and moisture gain are built. After that, the construction and operating modes of the heat pump dehumidifier are described, and the system model is established based on polynomial equations model. In a case study, an indoor swimming pool with a heat pump dehumidifier in Shanghai is studied. When outdoor air specific enthalpy is higher than 18.6 kJ/kg, the requirement of pool water heating can be met only by the heat pump dehumidifier, thus, auxiliary pool heater will not to be put into use. At last, economic analysis between the heat pump dehumidifier and conventional dehumidifier is conducted.     

应用于室内恒温游泳馆的2种带热回收空调系统对比分析

室内恒温游泳馆由于散湿量大,能耗高,采用热泵技术回收游泳馆内热湿空气中的热量是降低恒温游泳池能耗的有效措施,对于目前广泛采用的2种空调热回收系统,本文给出详细的对比分析,并得出结论,为恒温游泳馆空调系统方案选择提供参考意见。     

Performance of energy recovery ventilator with various weathers and temperature set-points

Based on the generic dynamic building energy simulation environment, EnergyPlus, the simulation model of energy recovery ventilator (ERV) is developed in this paper. With different indoor temperature set-points, the energy performance of ERV along with the availability of ERV is investigated both for Beijing and Shanghai weathers in China in terms of the ratio of heat recovery to energy supply by HVAC devices and ERV. Simulation results show that the seasonal average of the ratio is linear with indoor temperature set-points. The availability of ERV in Shanghai is better than that in Beijing during the winter. In summer, the utilization of ERV is uneconomical if the indoor temperature set-point is higher than 24 °C for the Beijing climate. The indoor temperature set-points have the reverse effects to the availability of ERV in the mid-season and to that in the hottest months. Meanwhile, the heating amount recovery in summer and the cooling amount recovery in winter, both of which impair the strong points of the energy recovery, are analyzed quantitatively.     

Energy simulation and analysis of the heat recovery variable refrigerant flow system in winter

Heat recovery variable refrigerant flow (HR-VRF) system can supply cooling and heating for the building simultaneously and make good use of the indoor cooling and heating capacity efficiently. This system has a good energy performance and can meet the emerging requirements of modern buildings. In order to evaluate the energy features of the system, a new energy simulation module is developed and embedded in the dynamic energy simulation program, EnergyPlus. Using the program with the newly developed module, the dynamic energy simulation is performed for a simplified typical commercial building. The indoor thermal comfort of the building in winter and the setting temperature of the system are analyzed. Based on the simulation results, the energy characteristics of the system are investigated, and it is indicated that different methods of the temperature control and the percentage of the heat recovery have influence on the relative ratio of the energy saving. If the HR-VRF system adopts the same temperature control method as the heat pump VRF (HP-VRF) system, the HR-VRF system promises 15-17% energy-saving potential, when compared to the HP-VRF system.     

峡江化工厂节能余热回收发电供车间温度调控的应用研究

根据化工厂制配车间建筑体室内温度控制的要求,结合硫磺制酸混合燃烧生成1 000℃左右的高温炉气热能实施余热回收设计,采取中压锅炉回收热量,经转化器、热交换器、省煤器、过热器产生温度450℃、压力3.82 MPa的中温中压过热蒸汽,进入汽轮发电机组发电。设计结果表明,余热回收热量6 000 kW/h,解决了车间建筑温控所需电能,节省外购电费356.3万元/a,获得直接经济效益615万元/a。     

热泵除湿机在会所恒温游泳池中的应用

介绍了热泵除湿机在制冷除湿的同时,实现了废热回收利用。通过室内参数的计算与常规系统进行经济性比较,阐明了热泵除湿机应用在游泳池中,既能提高室内舒适度,又能有效地节约能源。     

Swimming pools as heat sinks for air conditioners: Model design and experimental validation for natural thermal behavior of the pool

Swimming pools as thermal sinks for air conditioners could save approximately 40% on peak cooling power and 30% of overall cooling energy, compared to standard residential air conditioning. Heat dissipation from pools in semi-arid climates with large diurnal temperature shifts is such that pool heating and space cooling may occur concurrently; in which case heat rejected from cooling equipment could directly displace pool heating energy, while also improving space cooling efficiency. The performance of such a system relies on the natural temperature regulation of swimming pools governed by evaporative and convective heat exchange with the air, radiative heat exchange with the sky, and conductive heat exchange with the ground. This paper describes and validates a model that uses meteorological data to accurately predict the hourly temperature of a swimming pool to within 1.1 °C maximum error over the period of observation. A thorough review of literature guided our choice of the most appropriate set of equations to describe the natural mass and energy exchange between a swimming pool and the environment. Monitoring of a pool in Davis, CA, was used to confirm the resulting simulations. Comparison of predicted and observed pool temperature for all hours over a 56 day experimental period shows an R-squared relatedness of 0.967.     

按热量计费的住宅供热采暖技术研究 (上)

分析了住宅供热采暖系统采用温控和按热量计费的节能潜力,提出了适合我国国情的个有按热量计量功能的住宅室内采暖系统方案和室外供热管网水系统变水量控制方案。着重研究了室内采暖系统在安装散热器恒温阀后,其运行工况下性能参数的变化,在此基础上,研究了各种室内采暖系统相适应的室外供热管网水系统变水量运行策略,阐述了与我国住宅建筑采暖计量收费所适应的室内采暖系统和室外供热管网水系统的设计原则。     

实验动物环境空调系统节能研究进展

以实验动物环境的空调系统作为研究对象,根据我国的相关标准对实验动物环境的分类及环境技术指标进行介绍,综述了针对实验动物环境空调系统的节能措施及节能效果.室内设计参数(温度、相对湿度、换气次数等)的合理选取对全年每天24 h运行的空调系统的能耗有着深远影响,较小的差别会引起较大的能耗差距.IVC系统、单向流的送排风系统都...