地下采矿系统分析与安全生产管理

基于采矿效益和安全生产的双重目的,考虑到地下采矿生产环境与安全管理的复杂性,提出了地下采矿系统分析思想与方法。系统分析方法不仅注重采矿理论与技术在生产管理中的作用,更重要的是强调采矿技术与安全生产管理的结合,即采矿生产系统分析方法。作为应用实例,针对金川二矿区采矿、地质条件,简要介绍了用系统分析方法所开发的安全生产管理系统。     

Co-production of heat and power: an anchor tenant of a regional industrial ecosystem

The resource basis of industrial energy production is still, to a large extent, in non-renewable fossil fuels, the use of which creates emissions that the ecosystem has difficulty in tolerating. The goal of industrial ecology is to substitute the non-renewable stocks with renewable flows. In this paper, a regional industrial ecosystem that relies on a power plant as its key organisation, as an anchor tenant, is considered in the context of energy production and consumption. The co-production method of heat and electricity (CHP, co-production of heat and power) is implemented in the local power plant. This method uses the waste energy from electricity production for district heat and industrial heat/steam. The fuel basis in a CHP plant can include heterogeneous waste fuels. The method has been applied, to a large extent, in only three countries in the world; Denmark, The Netherlands and Finland. Examples of CHP-based industrial ecosystems from Finland are considered. CHP is reflected upon from the viewpoint of industrial ecosystem principles.     

The role of social, political, and economic interests in promoting state green electricity policies

State governments in the United States have adopted a number of policies to encourage the production of electricity from “green” energy sources. While these state-level policies have been shown to stimulate green electricity development, the rate at which such policies have been adopted by the states differs significantly. This paper examines the potential influence of a state's particular social, political, and economic interests on its propensity to adopt green electricity policies. We use an empirical model that combines various social, political and economic indicators as explanatory variables of a state's likelihood to adopt four specific green electricity policies: renewable portfolio standards, net metering rules, public benefits funds, and generation disclosure rules. Using binary logistics regressions, the results suggest that social interests, measured by the level of income, the level of education, and the degree of participation in environmental lobbying groups, are positively linked to the adoption of green electricity policies. Similarly, political interests as measured by the pro-environment voting by states’ representatives in the U.S. Congress, also play a positive role in the adoption of such policies.     

城市污水处理厂的能耗

给出了城市污水处理厂二级或二级以上的常规处理工艺流程,指出了流程中主要消耗能量的设备及能量消耗的计算方法.从技术的角度提出了降低能耗的管理措施.     

一种新型的环保节能采暖系统——地源热泵空调系统

本文简介了地源热泵采暖系统的结构、技术特点及原理,以及在国内外的使用情况和应用现状,该系统设备的合理配制,安全保证问题,经济性分析,环保,节能效果。     

热泵机组的噪声影响及治理

风冷式热泵噪声对周围环境产生一定的影响，已成为城市中带普遍性的固定噪声源，在调查分析热泵噪声及其传播特性的基础上，以两个实例剖析了热泵机组噪声治理中，距离衰减低，排风余压小（50Pa)，安装条件限制等技术措施，结果表明，采用全封闭的隔声消声装置，能把热泵的噪声传播影响降低20dB（A）左右。     

Water conservation through energy management

The objective of this paper is the simultaneous management of two important industrial resources – energy and water. A class of industrial processes where heat transfer is accompanied by mass transfer (water evaporation and condensation) are concerned, and special attention is given to them where the transfer of heat is a limiting stage. These processes are considered not in isolation but in integration with all related processes and subsystems. More specifically, the set of processes and subsystems include cooling systems, systems of contact economizers for flue gas energy recovery, scrubbers, direct steam heaters, driers, related systems of coolers and the heat exchanger networks. The proposed preliminary design procedure is based on concepts and tools related to Pinch technology especially modified for consideration of simultaneous heat and mass transfer. The manipulated parameters include process' latent and sensible heat loads and systems' structural changes with efficiency criteria allowing sacrifice of quantity for quality of performance. Two specific procedures allow targeting of maximum flue gas energy recovery and minimum temperature of cooling water providing guidance to structural design and system operation. The application of the proposed methodology is designed to achieve water conservation through minimization of water evaporation losses. Its significance is demonstrated through three popular industrial applications (a power station, a brewery and a tissue factory).     

Improving agricultural sustainability: the case of Swedish greenhouse tomatoes

Of major concern to agriculturists and society are issues of sustainability and land and resource requirements for food and fiber. Sustainability of Swedish domestic agriculture is explored using the production of tomatoes in greenhouses as a case study. Issues of sustainability are related to net yields, environmental loading, greenhouse gases, employment and land use. A model for evaluation of sustainability is developed and illustrated using the concepts and theories of analysis. The intensive tomato production system investigated was shown to be highly dependent on non-renewable resources and human service fed back from society. Substituting wood powder from logging residues for the oil used for heating reduced the environmental load and improved the sustainability of the system significantly.     

重庆地铁岩石隧道环境振动衰减规律

本文研究了重庆地铁岩石隧道环境振动衰减规律，并预测了重庆地铁振动的影响范围和程度。