Development and application of a new ballast water system for immersed tunnel installation: A case study of the Yuliangzhou tunnel in Xiangyang, China

Purpose As policy makers address the issue of climate adaptation, they are confronted with climate-specific barriers: a long-term horizon and a high degree of uncertainty. These barriers also hamper the development of spatial planning for climate adaptation. So how can spatial planners encompass these barriers and steer the general debate on climate adaptation? The paper aims to discuss these issues. Design/methodology/approach This research analyzes the strengths and weaknesses of an international design workshop on climate adaptation, and drought issues in particular. Design workshops are originally an educational setting but they are increasingly employed as a tool to explore alternative futures on a complex, real-life design problem. The case study illustrates how climate-specific barriers emerged throughout the design workshop and clarifies how they were encompassed by the participating design students. Findings The research clarifies the added value of a design workshop on climate adaptation. The paper highlights specific promising characteristics of the design workshop: the visualization of future adaptation challenges and the current water system, the focus on a regional project instead of sectoral adjustments and the integration of the adaptation challenge with other socio-economic goals. In the case study Flanders, however, the necessary participation of climate experts and policy makers of other domains proved challenging. Originality/value The paper argues that a design workshop has the potential to enrich the debate and policy work on climate adaptation. In many countries with low-planning tradition, however, additional tools are needed to help set the “adaptation agenda.”

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Control of Systems of Reservoirs with the Use of Risk Analysis

Acta Polytechnica ◽

10.14311/538 ◽

2004 ◽

Vol 44 (2) ◽

Author(s):

P. Fošumpaur ◽

L. Satrapa

Keyword(s):

Risk Analysis ◽

Flood Control ◽

Water System ◽

Water Reservoir ◽

The Czech Republic ◽

Run Off ◽

Hydropower Plants ◽

Basic Functions ◽

And Control

A system of reservoirs is usually defined as a system of water management elements, that are mutually linked by inner and outer connections in a purpose-built complex. Combined elements consist of reservoirs, river sections, dams, weirs, hydropower plants, water treatment plants and other hydraulic structures. These elements also include the rainfall system, the run-off system, the ground water system, etc. A system of reservoirs serves many purposes, which result from the basic functions of water reservoirs: storage, flood control and environmental functions. Most reservoirs serve several purposes at the same time. They are so called multi-purposes reservoirs. Optimum design and control of a system of reservoirs depends strongly on identifying the particular purposes. In order to assess these purposes and to evaluate the appropriate set of criteria, risk analysis can be used. Design and control of water reservoir functions is consequently solved with the use of multi-objective optimisation. This paper deals with the use of the risk analysis to determine criteria for controlling the system. This approach is tested on a case study of the Pastviny dam in the Czech Republic.

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Reduction of Energy Consumption in Hotels with Aerothermal Energy. Case Study: Canary Islands (Spain)

International Journal of Engineering & Technology ◽

10.14419/ijet.v7i3.32.18412 ◽

2018 ◽

Vol 7 (3.32) ◽

pp. 127

Author(s):

Francisco Javier Díaz Perez ◽

David Chinarro ◽

M Rosa Pino Otín ◽

Ricardo Díaz Martín ◽

Adib Guardiola Mouhaffel

Keyword(s):

Canary Islands ◽

Water System ◽

Heat Pumps ◽

Hot Water ◽

Hourly Rate ◽

The Hours ◽

Reduction Of Energy Consumption ◽

Opening And Closing ◽

And Control

This article presents a management model and control of energy efficiency in hotels adapted to the consumption patterns that ensure the comfort requirements of customers and integrated into the environment of an intelligent tourist complex. The analysis of the hot water system (DHW) of two hotels in the Canary Islands (Spain) in relation to their occupation, yields a solution based on renewable energies using high temperature heat pumps with aerothermal dissipation and supported by boilers of existing LPG propane. The control by programmable automatons (PLC) integrated in a system of control and acquisition of data (SCADA) optimizes the systems to maintain the maximum accumulated energy during the periods of cheapest electric tariff, by means of a system of opening and closing of hydraulic Valves that It manages to adjust the demand of DHW consumption to achieve the highest energy accumulation during the hours with the cheapest electricity tariff. The result after two and a half years of activity registration is a faster return on investment due to the optimized energy management of the system, through the control of operating hours adjusted to the needs of customers and the hourly rate. It has also been predicted that during the estimated 12 years of the system will have saved more than € 1,179,737 and thermal 8,780,005 kWh in a hotel 1 and € 1,315,104 and thermal 9,522,301 kWh in the hotel 2. This model shown can be seen how economically and energetically very efficient.

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