scholarly journals Experimentally economic analysis of ORC power plant with low-temperature waste heat recovery

2020 ◽  
Author(s):  
Lei Li ◽  
Leren Tao ◽  
Qingpu Li ◽  
Yongpan Hu
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Low Temperature ◽  
Economic Analysis ◽  
Waste Heat ◽  
Water System ◽  
Cooling Water ◽  
Economic Feasibility ◽  
Electricity Production ◽  
Commercial Application

Abstract Due to the low boiling point of organic fluids, the organic Rankine cycle (ORC) is an effective way to improve the recovery efficiency of low-temperature waste heat. An ORC power plant was established with an actual generating capacity of 16.3 kW. As the ORC technology is in the initial stage of commercial application, a technical and economic analysis has been conducted in this paper. Through analysis of each part investment of the power generation plant, it is found that the ORC system part accounts for 61% of the total initial investment, and the larger the power generation scale, the larger the proportion. An economic model has been proposed to study the economic feasibility of low-temperature industrial waste heat conversion in this plant. The influences of the installation of cooling water system, preheater, superheater, loan ratio, interest rate on electricity production cost (EPC) and profit are analyzed. According to the analysis, the lowest EPC of the plant is 0.46 Yuan/(kW • h).

Demonstration of ORC System Powered by Waste Heat From the Heuksando Island Internal Combustion Diesel Power Plant

2018 ◽  
Author(s):  
Sanghyup Lee ◽  
Hoon Jung
Keyword(s):  
Power Generation ◽  
Power Plant ◽  
Heat Source ◽  
Power Plants ◽  
Waste Heat ◽  
Numerical Study ◽  
Cooling Water ◽  
Organic Rankine Cycle ◽  
Operating Conditions ◽  
Source Analysis

Geographical characteristics give the island of Heuksando no choice but to use diesel power generation. This option is not economical, and more than half of the generated energy is released through exhaust gas, cooling water, and other sources of energy loss. In order to reduce these losses and improve power generation efficiency, this research studied Organic Rankine Cycle systems that use waste heat from diesel power plants as a heat source. Unlike previous Rankine cycles, electric power generation and operation are possible because of low heat source and capacity. Cycle design and demonstration-operation logic are required to set the range of waste heat temperature and capacity. In addition, as the overall efficiency may change substantially depending on the efficiency of each component, the operating conditions of various BOPs should be optimized. It is necessary to obtain the optimization and operating conditions of each element of the system through modeling and numerical study of the whole system. In this research, heat source analysis and BOP design were conducted in order to apply the 20kW/30kW ORC systems to the Heuksando Island 1MW diesel power plant. A heat-connecting technique that thermally connects the heat exhaust end piping and the evaporator of the ORC system was developed in this study. The demonstration experiment was conducted sharing the waste heat source with the 20kW and 30kW ORC systems. This paper presents the waste heat analysis and the demonstration operation results of the Heuksando island power plant.

scholarly journals Economic Analysis of a 3 MW Biomass Gasification Power Plant

2009 ◽  
Author(s):  
Robert Cattolica ◽  
Richard Herz ◽  
James Giolitto ◽  
Matt Summers
Keyword(s):  
Power Plant ◽  
Economic Analysis ◽  
Rural Areas ◽  
San Diego ◽  
Waste Heat ◽  
Economic Feasibility ◽  
San Diego County ◽  
Critical Element ◽  
Wood Biomass ◽  
Gasification Process

An economic and technical analysis of the use of separated wood biomass as a feedstock for gasification for a 3 MW power plant was conducted for the Miramar Landfill, located in San Diego County, CA. The method to generate combustible gas from the biomass is based on a dual-fluidized bed gasification process which operates at atmospheric pressure with air and produces a high quality producer gas with little nitrogen. The objective of the study was to determine the economic feasibility of the proposed biomass power system in terms of the potential revenue streams and costs. Major economic considerations in the analysis include feedstock, capital, and operating costs. Regulatory issues, inclusive of production credits, renewable energy incentives, and feed-in tariffs are addressed as significant economic inputs. The Miramar landfill, in San Diego County, CA is representative of a typical existing urban landfill, with corresponding feedstock and some market for separated wood biomass. The economic analysis of the proposed 3MW gasification power plant indicates that it would not have a net positive NPV under the current urban scenario. More likely successful candidates are landfill sites in more rural areas or urban sites, where new landfills are being developed or where the landfill is no longer operational but has become a transfer station. In all cases waste heat sales are a critical element in determining economic viability.

scholarly journals Comparative analysis of possibilities for raising the efficiency in thermal power plant by utilisation of waste heat energy

2016 ◽  
Vol 20 (6) ◽  
pp. 2171-2181
Author(s):  
Vladimir Mijakovski ◽  
Vangelce Mitrevski ◽  
Tale Geramitcioski
Keyword(s):  
Power Plant ◽  
Low Temperature ◽  
Thermal Power Plant ◽  
Waste Heat ◽  
Thermal Power ◽  
Heat Energy ◽  
Economic Feasibility ◽  
Energy Utilization ◽  
Temperature Heat ◽  
Basic Power

The possibility to use flue gases waste heat for increasing the efficiency of thermal power plant (TPP) explained in this work refers to lignite fired TPP-Bitola in Macedonia (3x233 MW installed electric capacity). Possibility to utilize low-temperature heat energy at the plant?s cold end is also considered in the analysis. Specific fuel consumption is used as an analysis and comparison parameter. Its reduction, compared to the basic power unit ranges between 0.4% and 3.4%. An analysis presenting economic feasibility of the low-temperature heat energy utilization concept for two different refrigerants used in the heat pump is also presented.

scholarly journals A Process for Evaluating Adverse Environmental Impacts by Cooling-Water System Entrainment at a California Power Plant

2002 ◽  
Vol 2 ◽  
pp. 81-105 ◽  
Author(s):  
C.P. Ehrler ◽  
J.R. Steinbeck ◽  
E.A. Laman ◽  
J.B. Hedgepeth ◽  
J.R. Skalski ◽  
...  
Keyword(s):  
Power Plant ◽  
Environmental Impacts ◽  
Environmental Protection Agency ◽  
Transport Model ◽  
Larval Fish ◽  
Larval Mortality ◽  
Water System ◽  
Cooling Water ◽  
Water Quality Control ◽  
Plant Effects

A study to determine the effects of entrainment by the Diablo Canyon Power Plant (DCPP) was conducted between 1996 and 1999 as required under Section 316(b) of the Clean Water Act. The goal of this study was to present the U.S. Environmental Protection Agency (EPA) and Central Coast Regional Water Quality Control Board (CCRWQCB) with results that could be used to determine if any adverse environmental impacts (AEIs) were caused by the operation of the plant’s cooling-water intake structure (CWIS). To this end we chose, under guidance of the CCRWQCB and their entrainment technical working group, a unique approach combining three different models for estimating power plant effects: fecundity hindcasting (FH), adult equivalent loss (AEL), and the empirical transport model (ETM). Comparisons of the results from these three approaches provided us a relative measure of confidence in our estimates of effects. A total of 14 target larval fish taxa were assessed as part of the DCPP 316(b). Example results are presented here for the kelp, gopher, and black-and-yellow (KGB) rockfish complex and clinid kelpfish. Estimates of larval entrainment losses for KGB rockfish were in close agreement (FH is approximately equals to 550 adult females per year, AEL is approximately equals to 1,000 adults [male and female] per year, and ETM = larval mortality as high as 5% which could be interpreted as ca. 2,600 1 kg adult fish). The similar results from the three models provided confidence in the estimated effects for this group. Due to lack of life history information needed to parameterize the FH and AEL models, effects on clinid kelpfish could only be assessed using the ETM model. Results from this model plus ancillary information about local populations of adult kelpfish suggest that the CWIS might be causing an AEI in the vicinity of DCPP.

scholarly journals Using adsorption chillers for utilising waste heat from power plants

2019 ◽  
Vol 23 (Suppl. 4) ◽  
pp. 1143-1151 ◽  
Author(s):  
Karol Sztekler ◽  
Wojciech Kalawa ◽  
Sebastian Stefanski ◽  
Jaroslaw Krzywanski ◽  
Karolina Grabowska ◽  
...  
Keyword(s):  
Power Generation ◽  
Energy Efficiency ◽  
Power Plant ◽  
Power Plants ◽  
Waste Heat ◽  
Primary Energy ◽  
Simulation Software ◽  
Coefficient Of Performance ◽  
Low Grade ◽  
Adsorption Chiller

At present, energy efficiency is a very important issue and it is power generation facilities, among others, that have to confront this challenge. The simultaneous production of electricity, heat and cooling, the so-called trigeneration, allows for substantial savings in the chemical energy of fuels. More efficient use of the primary energy contained in fuels translates into tangible earnings for power plants while reductions in the amounts of fuel burned, and of non-renewable resources in particular, certainly have a favorable impact on the natural environment. The main aim of the paper was to investigate the contribution of the use of adsorption chillers to improve the energy efficiency of a conventional power plant through the utilization of combined heat and power waste heat, involving the use of adsorption chillers. An adsorption chiller is an item of industrial equipment that is driven by low grade heat and intended to produce chilled water and desalinated water. Nowadays, adsorption chillers exhibit a low coefficient of performance. This type of plant is designed to increase the efficiency of the primary energy use. This objective as well as the conservation of non-renewable energy resources is becoming an increasingly important aspect of the operation of power generation facilities. As part of their project, the authors have modelled the cycle of a conventional heat power plant integrated with an adsorption chiller-based plant. Multi-variant simulation calculations were performed using IPSEpro simulation software.

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