Repowering of Slough Estates for Optimum Energy Conversion

1980 ◽  
Vol 194 (1) ◽  
pp. 279-289 ◽  
Author(s):  
D. Clifford ◽  
R. Coates ◽  
A. Park
Keyword(s):  
Energy Conversion ◽  
Energy Savings ◽  
High Efficiency ◽  
Treatment Plant ◽  
Electrical Energy ◽  
Heat Recovery Boiler ◽  
Steam Turbines ◽  
Residual Oil ◽  
Optimum Energy ◽  
Under Construction

Plant currently under construction for repowering Slough Estates is described. This will not only provide the basis for replacement of ageing plant, but will enable the existing steam turbines to work as part of a high efficiency cycle. The principles relating to the combined generation of steam and electrical energy are reviewed for existing and possible plant configurations, with a view to optimizing the energy conversion. The choice of a gas turbine and fully fired heat recovery boiler to provide extra power plus steam for existing purposes is shown to be justified by the savings in fuel and other operating costs over a typical year's operation. The new plant will burn gas, residual oil or distillate oil, and fuel treatment plant is an essential part of the equipment. The energy savings indicated using technology already available in Britain point the way to future developments.

Research on New Type Magnetohydrodynamic Ocean Wave Energy Conversion System

2014 ◽  
Vol 556-562 ◽  
pp. 1856-1859
Author(s):  
Zhen Wang ◽  
Yong Guo Li ◽  
Shi Ming Wang ◽  
Qing Yi He ◽  
Jie Zhang
Keyword(s):  
Liquid Metal ◽  
Energy Conversion ◽  
Permanent Magnet ◽  
Wave Energy ◽  
High Efficiency ◽  
Electrical Energy ◽  
Energy Conversion Efficiency ◽  
Channel Structure ◽  
Ocean Wave Energy ◽  
Conversion System

Liquid Metal MHD generation system for wave energy takes the wave motion into reciprocating motion of the liquid metal by using the efficient liquid Metal MHD power generation technology, and then the wave energy directly changes into electrical energy through the power conversion system. According to this principle, a flexible and direct magnetic fluid generating structure for wave energy is proposed. It selects the appropriate permanent magnet material and the liquid fluid, also an articulated manner to the permanent magnet. An array mode of permanent magnet and the initial channel structure of generating is important. The device has an advantage of low pollution, high efficiency and technology, can reduce energy consumption, improve energy conversion efficiency.

Ten Years’ Engineering Development in Gas Turbine Driven Natural Gas Compressor Stations

1978 ◽  
Author(s):  
H. Hondius ◽  
R. H. Meyer
Keyword(s):  
Gas Turbines ◽  
Energy Savings ◽  
High Efficiency ◽  
Waste Heat ◽  
Operational Experience ◽  
Energy Prices ◽  
Steam Turbines ◽  
Air Filtration ◽  
Noise Abatement ◽  
New Generation

The first generation gas compressor stations for N.V. Nederlandse Gasunie was designed in 1967 and equipped with aircraft derivative gasturbines of 11 MW driving single wheel centrifugal compressors. In later stations, similar machines and also industrial type gas turbines of 11 and 26 MW have been installed. With the system now including eight stations. a considerable experience was gained. Special described items are: (a) air filtration (b) noise abatement, (c) vibration due to pipe resonance, and (d) also the operational experience with aircraft derivative gas turbines compared with industrial type machines is described. During 1974, due to the increase in the energy prices, more emphasis was placed on energy savings. Studies revealed that for our case, the new generation high efficiency gas turbines showed more advantage than equipping existing machines with available recuperators or waste heat boilers and steam turbines. Replacement of some base load machines began in 1975. Later, a new recuperator was designed together with a well-known boiler firm, the first of which will come in operation by the end of 1978 to improve the efficiency of a 26-MW machine. Medio 1978 a total of 35 units with 502.2-MW output will have been installed, of which five are equipped with high efficiency drivers.

A Case Study of Energy Saving by CCHP Technology in a Hospital

2010 ◽  
Author(s):  
S. Okamoto
Keyword(s):  
Energy Demand ◽  
Energy Savings ◽  
High Efficiency ◽  
Hospital Setting ◽  
Electrical Energy ◽  
Electrical Heating ◽  
Public Network ◽  
Heating And Cooling ◽  
Energy Demands

This paper describes a study that starts with an analysis of typical energy demand profiles in a hospital setting followed by a case study of a CCHP system. The CCHP idea is of an autonomous system for the combined generation of electrical, heating, and cooling energy in a hospital. The driving units are two high-efficiency gas engines that produce the electrical and heat energy. A gas engine meets the requirement for high electrical and heating energy demands; a natural gas-fuelled reciprocating engine is used to generate 735 kW of power. In our case, the electrical energy was used only in the hospital. A deficit in electricity can be covered by purchasing power from the public network. Generated steam drives three steam-fired absorption chillers and is delivered to individual heat consumers. This system can provide simultaneous heating and cooling. No technical obstacles were identified for implementing the CCHP. The typical patterns for driving units of CCHP were decided by the hourly energy demands in several seasons throughout the year. The average ratio between electric and thermal loads in the hospital is suitable for CCHP system operation. An analysis performed for a non-optimized CCHP system predicted a large potential for energy savings and CO2 reduction.

scholarly journals Research and Application of Thermoelectric Energy Conversion Device Based on Heat Dissipation of Coal Pile

2019 ◽  
Vol 9 (2) ◽  
pp. 30
Author(s):  
Jian-gang Wang
Keyword(s):  
Low Power ◽  
Energy Conversion ◽  
Heat Pipe ◽  
Heat Dissipation ◽  
High Efficiency ◽  
Electric Energy ◽  
Electrical Energy ◽  
Thermoelectric Energy Conversion ◽  
Thermoelectric Energy ◽  
Power Load

In view of the spontaneous combustion of coal piles, waste of resources and environmental pollution, gravity heat pipes are inserted into coal piles, and the heat inside the coal piles will be extracted in time because of the high-efficiency thermal conductivity of the heat pipe phase change. In order to achieve energy conservation and environmental protection, a thermoelectric energy conversion device based on gravity heat pipe was designed, which can convert heat energy extracted from the coal pile into electrical energy for supply of low power loads. The results show that the gravity heat pipe can effectively suppress the temperature rise inside the coal pile; the coal body within 0.03m away from the gravity heat pipe is better in cooling effect; the thermoelectric energy conversion system is capable of converting thermal energy inside the coal pile into electric energy and supplying a low power load such as a wireless sensor.

A Case Study of Energy Saving by Cogeneration System in Hospital

2010 ◽  
Author(s):  
S. Okamoto
Keyword(s):  
Energy Demand ◽  
Energy Savings ◽  
High Efficiency ◽  
Hospital Setting ◽  
Electrical Energy ◽  
Electrical Heating ◽  
Public Network ◽  
Heating And Cooling ◽  
Cogeneration System

This paper describes a study that starts with an analysis of typical energy demand profiles in a hospital setting followed by a case study of a cogeneration system (CGS) under an energy service company (ESCO) project. The CGS idea is of an autonomous system for the combined generation of electrical, heating, and cooling energy in a hospital. The driving units are two high-efficiency gas engines that produce the electrical and heat energy. A gas engine meets the requirement for high electrical and heating energy demands; a natural gas-fuelled reciprocating engine is used to generate 735 kW of power. In our case, the electrical energy will be used only in the hospital. A deficit in electricity can be covered by purchasing power from the public network. Generated steam drives three steam-fired absorption chillers and is delivered to individual heat consumers. This system can provide simultaneous heating and cooling. No technical obstacles were identified for implementing the CGS. The average ratio between electric and thermal loads in the hospital is suitable for CGS system operation. An analysis performed for a non-optimized CGS system predicted a large potential for energy savings.

scholarly journals Substantiation of the effectiveness of the hydro-steam turbines application in mine power complexes for excess heat recovery

2019 ◽  
Vol 109 ◽  
pp. 00018
Author(s):  
Inna Diakun ◽  
Mykhailo Kirsanov ◽  
Vitalii Ruban
Keyword(s):  
Energy Efficiency ◽  
Steam Turbine ◽  
Heat Recovery ◽  
High Efficiency ◽  
Electrical Energy ◽  
Back Pressure ◽  
Steam Turbines ◽  
Reaction Type ◽  
Excess Heat ◽  
Power Facility

The main problems connected with an increase in the performance efficiency of the mine power complexes, should include issues of rational use of fuel in power facilities, as well as the maximum consumption of produced thermal and electrical energy. One solution to this problem has been proposed to use in schematic solutions the reaction-type hydro-steam turbine for excess heat recovery of and generation of additional electrical energy. The condition has been set in the article for the choice of the configuration of a hydro-steam turbine nozzle with a high efficiency of energy conversion, as well as the variants have been studied of principle schemes for energy complexes: the scheme for a power facility, consisting of a gas-reciprocating module, on the shaft of which a module with a hydro-steam turbine is set, as well as the scheme for a module placement of back pressure turbine and hydro-steam turbine on the same shaft with a gas-reciprocating module. A comparative analysis has been performed of energy efficiency of the proposed principle schemes for the energy complexes.

Energy savings potential of new aeration system: Full scale trials

2012 ◽  
Vol 7 (4) ◽  
Author(s):  
A. Lazić ◽  
V. Larsson ◽  
Å. Nordenborg
Keyword(s):  
Control System ◽  
Energy Consumption ◽  
Total Energy ◽  
Energy Savings ◽  
Treatment Plant ◽  
Full Scale ◽  
Total Energy Consumption ◽  
Aeration System ◽  
Fine Bubble ◽  
Aeration Control

The objective of this work is to decrease energy consumption of the aeration system at a mid-size conventional wastewater treatment plant in the south of Sweden where aeration consumes 44% of the total energy consumption of the plant. By designing an energy optimised aeration system (with aeration grids, blowers, controlling valves) and then operating it with a new aeration control system (dissolved oxygen cascade control and most open valve logic) one can save energy. The concept has been tested in full scale by comparing two treatment lines: a reference line (consisting of old fine bubble tube diffusers, old lobe blowers, simple DO control) with a test line (consisting of new Sanitaire Silver Series Low Pressure fine bubble diffusers, a new screw blower and the Flygt aeration control system). Energy savings with the new aeration system measured as Aeration Efficiency was 65%. Furthermore, 13% of the total energy consumption of the whole plant, or 21 000 €/year, could be saved when the tested line was operated with the new aeration system.

Energy Savings at Phoenix 23rd Avenue Wastewater Treatment Plant Using Feed-Forward Process Control

2009 ◽  
Vol 2009 (13) ◽  
pp. 3722-3729 ◽  
Author(s):  
Thomas Walz ◽  
J.R. Coughenour ◽  
Kevin Williams ◽  
John Jacobs ◽  
Larry Shone ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Process Control ◽  
Wastewater Treatment Plant ◽  
Energy Savings ◽  
Treatment Plant ◽  
Feed Forward ◽  
Forward Process

scholarly journals Transport Parameter Correlations for Digitally Created PEFC Gas Diffusion Layers by Using OpenPNM

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1141
Author(s):  
Ángel Encalada-Dávila ◽  
Mayken Espinoza-Andaluz ◽  
Julio Barzola-Monteses ◽  
Shian Li ◽  
Martin Andersson
Keyword(s):  
Fuel Cell ◽  
Energy Conversion ◽  
Transport Phenomena ◽  
Electrical Energy ◽  
Gas Diffusion ◽  
Polymer Electrolyte Fuel Cell ◽  
Carbon Paper ◽  
Transport Parameter ◽  
Transport Parameters ◽  
Depth Analysis

A polymer electrolyte fuel cell (PEFC) is an electrochemical device that converts chemical energy into electrical energy and heat. The energy conversion is simple; however, the multiphysics phenomena involved in the energy conversion process must be analyzed in detail. The gas diffusion layer (GDL) provides a diffusion media for reactant gases and gives mechanical support to the fuel cell. It is a complex medium whose properties impact the fuel cell’s efficiency. Therefore, an in-depth analysis is required to improve its mechanical and physical properties. In the current study, several transport phenomena through three-dimensional digitally created GDLs have been analyzed. Once the porous microstructure is generated and the transport phenomena are mimicked, transport parameters related to the fluid flow and mass diffusion are computed. The GDLs are approximated to the carbon paper represented as a grouped package of carbon fibers. Several correlations, based on the fiber diameter, to predict their transport properties are proposed. The digitally created GDLs and the transport phenomena have been modeled using the open-source library named Open Pore Network Modeling (OpenPNM). The proposed correlations show a good fit with the obtained data with an R-square of approximately 0.98.

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