多联机VRV系统特点浅析

针对多联机VRV系统原理和特点,对其系统性能及特点进行了分析.     

谈对环保采暖问题的分析

由于环保要求的提高,我国北方越来越多的城市限制燃煤采暖,随之而来何种清洁节能的采暖系统可替代燃煤采暖成为关系到国计民生的紧要课题.本文通过对三种风冷热泵机组低温(-6～-16℃)性能的测试.发现采用地板采暖时,由于地板所需水温较低,C.O.P可以在3.0以上,比风机盘管供暖节省30-35%.选择低温性能优异的风冷热泵机组,并适当考虑功率大一些,在我国大部分北方地区,均可以满足采暖要求,达到明显节能、环保的效果.风冷热泵结合地板采暖将是替代燃煤采暖的最经济的清洁采暖系统.     

过冷器前节流中间补气空气源热泵性能模拟研究

为了解决空气源热泵在低温工况下性能衰减、排气温度过高和制热不足等问题,以过冷器前节流中间补气空气源热泵循环系统为研究对象,建立了以带补气单螺杆压缩机为热力系的循环理论数学模型,给出了中间平衡补气压力的计算流程,并对系统参数进行了模拟计算。结果表明：与不补气压缩系统相比,补气对系统COP、制热量的提升具有明显作用;压缩机的补气口越靠近吸气结束位置,系统性能参数越好;在蒸发温度-25 ℃情况下,补气与过冷器过冷侧液体出口的温差降低6 ℃,压力损失系数从0.42增加到0.82,COP提升了14%左右。因此,在能够保证过冷器正常运行的情况下,尽可能减小补气口与过冷器过冷侧液体出口的温差,尽量减少补气过程中的压力损失,有利于补气热泵系统性能的提升。研究结果可为过冷器空气源热泵系统的设计提供理论支持。     

小型污水源热泵系统运行实验研究

介绍了小型污水源热泵系统实验装置在冬季供暖运行和夏季制冷运行实验情况,测试了运行工作时实验系统的COP、污水温度变化情况、室内外温度变化情况和冷凝器和蒸发器进出口温度变化情况以及其他各种参数。实验结果表明,该小型污水源热泵系统具有较高的COP和良好的使用性能,节能效果十分显著。     

寒冷地区空气源热泵实验研究

研制了以回收排风热量为热源来预热室外新风的空调实验系统,解决了在寒冷地区冬季空气源热泵不能正常运行和新风机组冻裂的问题,为实际工程应用奠定了技术基础。研究结果表明,该系统各项技术指标稳定,满足建筑物冬季供热的负荷要求;测得COP值在4．10以上,热回收效率最高可这85％,具有良好的节能性和经济性。     

空间定向障碍评价方法研究

空间定向障碍(SD)是指飞行员在三维空间飞行中对飞行姿态、位置和运动状况发生的错误判断。SD严重影响着飞行安全,虽然SD被很多学者关注,但针对不同类型SD的研究不多,尤其缺乏不可认知型SD的相关研究。为解决上述问题,在详细分析国内外已有研究成果的基础上,结合SD的产生原因和认知学分类,将现有SD的评价方法归纳总结,概述了主观评价法、生理心理参数专项检测法、行为学评价法和认知学评价法的优缺点及其适用的SD类型。以4种评价方法为基础,提出一种集主观评价和行为学足底压力中心评价为一体的、针对认知阈下的不可认知型SD评价方法。所提出的新方法不仅可以从主观上区分认知类型,还将客观行为学数据作为是否出现SD的评价依据,适用于不可认知型SD,为其鉴定及后续的对抗训练提供了重要依据。     

Coopetitive games for environmental sustainability: Climate change and decision global policies

In this work, we propose and analyze a coopetitive model for the Climate Change environmental sustainability: a global duopoly type game structure, involving a generic type of green technological good. Our model allows to select certain strategy profile solutions within a continuous horizon of possible global scenarios, in the context of the Paris agreement COP21 and after Trump’s decision to abandon the agreement itself. More specifically, we construct a parametric coopetitive game with two great actors, US and the group of countries which still agree to COP21. The two actors of our duopoly game compete on the global market by producing and selling green technological goods (for example: electric cars, electric airplanes, hydrogen cars, solar panels, low impact batteries for smart houses, electric cars or self phones, and so on). Our multi-dimensional coopetitive model suggests possible cooperative strategies in order to improve the efficiency and strength of the actions enforced by the countries to mitigate the Climate Change catastrophic risk at the level of its causes and effects.     

A report on the Paris Climate Change Agreement and its implications for tourism: why we will always have Paris

Sustained international diplomatic efforts culminated in the signing of the Paris Climate Agreement by 196 countries in December 2015. This paper provides an overview of the key provisions of the agreement that are most relevant to the tourism sector: much strengthened and world-wide participation in greenhouse gas emission reduction ambitions, an enduring framework for increased ambitions over time, improved transparency in emissions reporting and a greater emphasis on climate risk management through adaptation. The declared carbon emission reduction ambitions of the tourism sector and international aviation are found to be broadly compatible with those of the Paris Agreement, however, claims of reduced emission intensity in the tourism sector since 2005 and a roadmap by which emission reduction ambitions for 2020 and 2035 might realistically be achieved both remain equivocal. The need for international tourism leadership to improve sectoral scale emission monitoring capacity to meet the increasing requirements for transparency, convene an assessment of risks from climate change and climate policy, foster greater collaboration on destination climate resilience and accelerate technological, policy and social innovation to put tourism firmly on a pathway to the low-carbon economy are all emphasized, as is the need for dialogue between tourism and tourism researchers.     

气候大会碳排放谈判的博弈分析

联合国气候变化大会是目前全球范围内最为重要的气候环境会议之一,其关注的重点是参与国的碳排放谈判和碳限制。基于博弈的思想,构建出一个气候大会碳排放谈判的博弈模型。并基于该模型,采用中国的相关数据来解释目前的谈判现状。结果发现,这一模型符合IPCC对发展中国家的要求。其次根据对比结果可知,中国目前在碳排放博弈中尚未完全掌握主导权。建议中国在全球碳排放谈判中要坚持以单位GDP碳排放作为减排指标,同时动态调整减排目标和路径。     

小型污水源热泵系统运行实验研究

介绍了小型污水源热泵系统实验装置在冬季供暖运行和夏季制冷运行实验情况,测试了运行工作时实验系统的COP、污水温度变化情况、室内外温度变化情况和冷凝器和蒸发器进出口温度变化情况以及其他各种参数。实验结果表明,该小型污水源热泵系统具有较高的COP和良好的使用性能,节能效果十分显著。