Evaluation and Optimization of Automated Operation in Small CHP Plants

2000 ◽  
Author(s):  
Jeppe Grue ◽  
Jens Andersen ◽  
Niels From ◽  
Inger Bach
Keyword(s):  
Power Generation ◽  
Objective Function ◽  
Electric Power ◽  
Power Plants ◽  
Electrical Power ◽  
District Heating ◽  
Combined Heat And Power ◽  
Optimal Operating ◽  
Gas Engine ◽  
Operating Strategy

Abstract In Denmark power generation is extensively based on small combined heat and power plants, which produce electric power and district heating. This work will focus on the small plants around 1 MW in size, which are often unmanned and operating completely automatically. The objective of this work is to formulate a method which can be used to determine the optimal operating strategy for a CHP plant, and that this strategy must be fully automated. The contribution margin of the plant is used as the objective function for the optimization. Finally the method is tested on a small CHP plant, which is a gas engine producing 1.34 MW electrical power and 1.6 MJ/s district heating. The methods, which are developed, can be used in general for the evaluation and optimization of automated strategies for the operation of small-unmanned CHP plants. The strong feature of the method is that it sets an ultimate target that is the best possible one to obtain with a view to any strategy. This provides a basis for the evaluation and optimization of the actual strategy.

scholarly journals A Comparison of Different Approaches for Assessing Energy Outputs of Combined Heat and Power Geothermal Plants

2021 ◽  
Vol 13 (8) ◽  
pp. 4527
Author(s):  
Daniele Fiaschi ◽  
Giampaolo Manfrida ◽  
Barbara Mendecka ◽  
Lorenzo Tosti ◽  
Maria Laura Parisi
Keyword(s):  
Power Generation ◽  
Low Temperature ◽  
Power Plants ◽  
District Heating ◽  
Primary Energy ◽  
Combined Heat And Power ◽  
Geothermal Systems ◽  
Allocation Scheme ◽  
Component Level ◽  
Temperature Level

In this paper, we assess using two alternative allocation schemes, namely exergy and primary energy saving (PES) to compare products generated in different combined heat and power (CHP) geothermal systems. In particular, the adequacy and feasibility of the schemes recommended for allocation are demonstrated by their application to three relevant and significantly different case studies of geothermal CHPs, i.e., (1) Chiusdino in Italy, (2) Altheim in Austria, and (3) Hellisheidi in Iceland. The results showed that, given the generally low temperature level of the cogenerated heat (80–100 °C, usually exploited in district heating), the use of exergy allocation largely marginalizes the importance of the heat byproduct, thus, becoming almost equivalent to electricity for the Chiusdino and Hellisheidi power plants. Therefore, the PES scheme is found to be the more appropriate allocation scheme. Additionally, the exergy scheme is mandatory for allocating power plants’ environmental impacts at a component level in CHP systems. The main drawback of the PES scheme is its country dependency due to the different fuels used, but reasonable and representative values can be achieved based on average EU heat and power generation efficiencies.

Modernization of CHP Cycle in Sugar Complex

2013 ◽  
Vol 281 ◽  
pp. 578-581
Author(s):  
Sanjay S. Bhagwat ◽  
S.D. Pohekar ◽  
A.M. Wankhade
Keyword(s):  
Power Generation ◽  
High Pressure ◽  
Electric Power ◽  
Sugar Cane ◽  
Combined Heat And Power ◽  
Power Ratio ◽  
Heat Power ◽  
Sugar Factory ◽  
Power Cycle ◽  
Surplus Power

Keywords: CHP, Bagasse, Heat Power Ratio, TCD Abstract: A huge potential for power generation from waste fuels exists within the sugar cane industry. Newly developed advanced high pressure boiler technology and utilizing modified combined heat and power cycle opens the way to fully exploit this potential, yielding more kWh’s of electric power per tonne of cane. This paper deals feasibility of bagasse based modified CHP cycle for 2500TCD sugar factory for surplus power generation.

scholarly journals THE MODERN LEVEL OF DEVELOPMENT OF ENGINES WITH GAS-ENGINE AND ELECTRIC POWER PLANTS ON THE TRANSPORT AND TRACTION MEANS

2019 ◽  
Vol 4 ◽  
pp. 52-59 ◽  
Author(s):  
OTARI N. DIDMANIDZE ◽  
◽  
ARTEMBEK S. GUZALOV ◽  
NIKOLAY A. BOLSHAKOV ◽  
◽  
...  
Keyword(s):  
Electric Power ◽  
Power Plants ◽  
Gas Engine ◽  
Electric Power Plants ◽  
Modern Level

scholarly journals Nuclear Power: Time to Start Again

2003 ◽  
Author(s):  
William D. Rezak
Keyword(s):  
Power Generation ◽  
Electric Power ◽  
Nuclear Power ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Environmentally Friendly ◽  
Power Industry ◽  
Nuclear Industry ◽  
The Us ◽  
Generating Capacity

One of America’s best kept secrets is the success of its nuclear electric power industry. This paper presents data which support the construction and operating successes enjoyed by energy companies that operate nuclear power plants in the US. The result—the US nuclear industry is alive and well. Perhaps it’s time to start anew the building of nuclear power plants. Let’s take the wraps off the major successes achieved in the nuclear power industry. Over 20% of the electricity generated in the United States comes from nuclear power plants. An adequate, reliable supply of reasonably priced electric energy is not a consequence of an expanding economy and gross national product; it is an absolute necessity before such expansion can occur. It is hard to imagine any aspect of our business or personal lives not, in some way, dependent upon electricity. All over the world (in 34 countries) nuclear power is a low-cost, secure, safe, dependable, and environmentally friendly form of electric power generation. Nuclear plants in these countries are built in six to eight years using technology developed in the US, with good performance and safety records. This treatise addresses the success experienced by the US nuclear industry over the last 40 years, and makes the case that this reliable, cost-competitive source of electric power can help support the economic engine of the country and help prevent experiences like the recent crisis in California. Traditionally, the evaluation of electric power generation facility performance has focused on the ability of plants to produce at design capacity for high percentages of the time. Successful operation of nuclear facilities is determined by examining capacity or load factors. Load factor is the percentage of design generating capacity that a power plant actually produces over the course of a year’s operation. This paper makes the case that these operating performance indicators warrant renewed consideration of the nuclear option. Usage of electricity in the US now approaches total generating capacity. The Nuclear Regulatory Commission has pre-approved construction and operating licenses for several nuclear plant designs. State public service commissions are beginning to understand that dramatic reform is required. The economy is recovering and inflation is minimal. It’s time, once more, to turn to the safe, reliable, environmentally friendly nuclear power alternative.

The Elephant in the Room–Gas Turbine Power

2010 ◽  
Vol 132 (12) ◽  
pp. 57-57
Author(s):  
Lee S. Langston
Keyword(s):  
Power Plant ◽  
Electric Power ◽  
Gas Turbine ◽  
Power Plants ◽  
Electrical Power ◽  
Electric Power Industry ◽  
Hydrocarbon Fuel ◽  
Combined Cycle ◽  
Electrical Generator ◽  
Gas Turbine Exhaust

This article presents an overview of gas turbine combined cycle (CCGT) power plants. Modern CCGT power plants are producing electric power as high as half a gigawatt with thermal efficiencies approaching the 60% mark. In a CCGT power plant, the gas turbine is the key player, driving an electrical generator. Heat from the hot gas turbine exhaust is recovered in a heat recovery steam generator, to generate steam, which drives a steam turbine to generate more electrical power. Thus, it is a combined power plant burning one unit of fuel to supply two sources of electrical power. Most of these CCGT plants burn natural gas, which has the lowest carbon content of any other hydrocarbon fuel. Their near 60% thermal efficiencies lower fuel costs by almost half compared to other gas-fired power plants. Their installed capital cost is the lowest in the electric power industry. Moreover, environmental permits, necessary for new plant construction, are much easier to obtain for CCGT power plants.

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