扩频载波用户终端的居民小区远程抄表系统设计

手工抄录电能表已无法满足供电企业的需要,设计开发远程抄表系统势在必行。通过对目前国内远程抄表系统的现状进行分析,提出了直接利用低压电力线构成与低压电网系统结构相对应的,基于“用户电度表终端 配变集中器 营业站电能抄算主机”组网方式的远程抄表系统这一新颖的远抄方案,并对试点居民小区远程抄表系统的总体方案进行了设计,包括系统组成结构及功能描述、网络通信协议的选择与研究、用户电度表终端的总体设计、配变集中器的总体设计和营业站抄算主机的总体设计等。     

一种实用远程电能抄表系统的应用分析

提出一种基于RS485通信和MOXA通信服务器的经济、实用的远程电能抄表系统的建设方案,分析了该方案的技术特点及其在地区电网中的实际应用,对其他地区供电系统的电能采集系统的建设具有参考价值。     

广西城镇、工业取水计量及用水定额管理工作状况分析

实行用水定额及取水计量管理是<水法>规定的水资源配置的两项基本制度,是取水许可制度的核心和关键,两项制度实行得好与坏关系到水资源科学管理水平的提高.分析了当前广西用水定额及取水计量管理工作的状况,指出工作中存在的问题,并提出初步改进建议.     

高压电力计量系统故障分析与建模

提出了高压电力计量系统网络故障模型.首先,通过对不同负荷下计量系统电路参数的分析,得出网络阻抗与电流互感器一次侧短路之间的密切关系.其次,设计辅助电路用于检测阻抗的变化,从而导出故障检测模型.最后进行了仿真研究,以证明模型对故障检测的有效性.     

RA58G5H5/1.L隔膜计量泵故障分析与处理

阐述了RA58G5H5/1.L型隔膜计量泵的基本结构与工作原理,分析了其常见故障与处理方法,从而保证泵的安全平稳运行和长周期生产.     

住宅采暖热量计的比较及选择

介绍了流量温差式热表、蒸发式热分配表、数字式智能型热表的机理及其与采暖系统的匹配性能,并进行了比较,结果表明数字式智能型热表适用于分户计量、按户收费的采暖系统,具有匹配性好、计量显示准确、投资少、施工安装方便的特点。     

Harnessing anaerobic digestion for combined cooling,heat, and power on dairy farms: An environmental life cycle and techno-economic assessment of added cooling pathways

Anaerobic digestion coupled with combined heat and power production on dairy farms is environmentally advantageous; however, high capital and operating costs have limited its adoption, especially in the United States, where renewable electricity and heat production are under-incentivized. Biogas is also at a disadvantage because it has to compete with very low natural gas prices. The objective of this study was to evaluate the feasibility of integrating absorption refrigeration technology for combined cooling, heat, and power (CCHP) on the farm to help bridge this economic hurdle. A combined environmental life cycle and techno-economic assessment was used to compare 2 cooling pathways with and without co-digestion. We considered using CCHP to (1) displace electricity-driven refrigeration processes (e.g., milk chilling/refrigeration, biogas inlet cooling) or (2) mitigate heat stress in dairy cattle via conductive cow cooling. All cooling scenarios reduced environmental emissions compared with combined heat and power only, with an appreciable reduction in land use impacts when employing conductive cow cooling. However, none of the cooling scenarios achieved economically viability. When using cooling power to displace electricity-driven refrigeration processes, economic viability was constrained by low electricity prices and a lack of incentives in the United States. When used for conductive cow cooling, economic viability was constrained by (1) low waste heat-to-cooling conversion efficiency; (2) limited conductive cow cooling effectiveness (i.e., heat-stress mitigation); and (3) low heat stress frequency and limited severity. However, we predict that with minor improvements in conductive cow cooling effectiveness and in hotter climates, CCHP for conductive cow cooling would be economically viable even in current US energy markets.     

加药装置在连续重整装置中的问题及处理

介绍加药装置的结构、工作原理及技术特点,简单阐述了加药装置的工作流程,针加药整装置开工过程中所遇到的问题,判断计量泵、搅拌机和电加热器经常损坏原因,同时为下一步的改造提出了具体方案。经过改造后,两年来加药装置运行情况说明这些改造是成功的。     

基于BACnet的VRF空调分户计费系统

针对VRF空调系统的特点,研究了其能耗计量和计费的方式及特点,提出了VRF空调分户计费系统的体系架构,开发了基于BACnet标准的VRF空调分户计费系统。这种计费系统具有成本低、计量科学、计费公正合理的特点,并且可以通过Web页面和BACnet标准接口分别实现远程访问和与楼宇管理系统(BMS)集成。     

工业用户燃气远程自动抄表系统的应用

自动抄表系统是利用无线数据传输技术实现对用户用气状况的远程管理。从工业用户实际应用出发,阐述了燃气远程自动抄表系统的工作原理、组成、功能、应用注意事项,提出了拓展应用的建议。