论火力发电厂循环水泵房出水管抗推部分的结构设计

文章以某2×300MW机组火力发电厂循环水泵房为例，介绍了循环水泵房结构出水管抗推部分的设计方法。     

国产引进型300MW汽轮机通流部分改造及效益分析

分析了国产引进型300MW双缸双排汽凝汽式汽轮机热耗率大、经济性差的原因。采用全三维技术对汽轮机高中压通流部分进行改造,设计使用了先进的子午收缩型调节级和弯扭马刀叶片,有效提高了机组的经济性和可靠性。该技术在江西丰城发电厂4×300MW机组上的应用经验,可为其他同类机组增容降耗改造提供借鉴。     

小型潜水电泵监督抽查的技术标准

文章提出了小型潜水电泵监督抽查依据的国家行业技术标准。     

浅析化学制药中低温合成反应的实现

文章主要介绍设计制冷机组来实现头孢类抗生素的低温合成反应。首先介绍了制冷机组运用在化学制药低温合成反应中的意义,其次介绍如何选用制冷剂和载冷剂并通过整个制冷系统的传热能量衡算来确定制冷压缩机、冷凝器和蒸发器,最后介绍通过制冷系统的试运行验证此制冷机组是否符合使用要求。     

电加热技术在集输系统中的节能应用分析

近年来,井口电加热装置在油田应用的越来越广,该装置投资低、管理方便、不污染环境。但是,该技术对油井能耗状况、机采系统效率方面,还没有系统的分析。为此,结合沙埝油田区块的井口电加热改造情况,分析改造前后的机采系统效率和能源消耗情况,探讨电加热技术的节能潜力。     

浅层出砂井地层测试工艺探讨与应用

为解决海上油井浅层出砂井中封隔器密封性和座封、出砂控制、排液方式等问题,根据浅层出砂井的地质特征,通过增加管柱重量、优选测试工具及管柱设计、排液方式等测试工艺措施,探讨了螺杆泵排液＋钻铤＋测试阀测试管柱结构的可行性,通过现场应用,该测试工艺在浅层出砂井中具有极强相容性及优越性。     

余热发电机功角间接式精确

在分析与总结了余热发电机传统功角测量方法的基础上,提出了基于DSP技术的功角测量方法,充分利用在信号分析与处理方面的优势,先进行同步采样得到电压、电流的采样序列,再进行数字滤波和傅氏滤波可以精确得到基于工频分量的功角,最后仿真并证明了此方法的正确性。     

空分装置运行常见故障与排除

本文介绍了空分装置运行过程中易出现的故障,分析故障产生的原因,并对故障提出了相应的解决方法和措施,对装置的日常运行提出针对性的建议,从而延长装置的运行周期,减少装置检修次数,为企业带来显著的效益。     

OTC trades and liquidity in the European carbon market more than meets the eye

ABSTRACT

This study investigates whether the previously reported price impact of OTC trades in the EU ETS can be attributed to their distinctively larger size (liquidity related) or to their discretionary feature (information related). The findings suggest that OTC trades induce volatility shocks that are higher in magnitude and faster resolved than those of solely high trading-intensity trades, which appears to be driven mainly by their presence, rather than by their size. An analysis of intraday price premia reveals that they are strategically placed by interacting with the organized market whenever their price and volatility impact is lower.     

Long-term health economic benefits of sensor-augmented pump therapy vs continuous subcutaneous insulin infusion alone in type 1 diabetes: a UK perspective

Aims/hypothesis:

Continuous subcutaneous insulin infusion (CSII) is an important treatment option for type 1 diabetes patients unable to achieve adequate glycemic control with multiple daily injections (MDI). Combining CSII with continuous glucose monitoring (CGM) in sensor-augmented pump therapy (SAP) with a low glucose-suspend (LGS) feature may further improve glycemic control and reduce the frequency of hypoglycemia. A cost-effectiveness analysis of SAP?+?LGS vs CSII plus self-monitoring of blood glucose (SMBG) was performed to determine the health economic benefits of SAP?+?LGS in type 1 diabetes patients using CSII in the UK.

Methods:

Cost-effectiveness analysis was performed using the CORE diabetes model. Treatment effects were sourced from the literature, where SAP?+?LGS was associated with a projected HbA_1c reduction of ?1.49% vs ?0.62% for CSII, and a reduced frequency of severe hypoglycemia. The time horizon was that of patient lifetimes; future costs and clinical outcomes were discounted at 3.5% and 1.5% per annum, respectively.

Results:

Projected outcomes showed that SAP?+?LGS was associated with higher mean quality-adjusted life expectancy (17.9 vs 14.9 quality-adjusted life years [QALYs], SAP?+?LGS vs CSII), and higher life expectancy (23.8 vs 21.9 years), but higher mean lifetime direct costs (GBP 125,559 vs GBP 88,991), leading to an incremental cost-effectiveness ratio (ICER) of GBP 12,233 per QALY gained for SAP?+?LGS vs CSII. Findings of the base-case analysis remained robust in sensitivity analyses.

Conclusions/interpretation:

For UK-based type 1 diabetes patients with poor glycemic control, the use of SAP?+?LGS is likely to be cost-effective compared with CSII plus SMBG.