Developing a Cost Model and Methodology to Estimate Capital Costs for Thermal Energy Storage

Glatzmaier, Greg C.

doi:10.2172/1031953

Cited by 47 publications

(33 citation statements)

References 7 publications

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“…Employing the above cost rates, for a two-tank molten salt thermal storage system shows a total cost of $26.72/kWh t , which comes close to the $26.22/kWh t value reported in Ref. [69].…”

Section: De-fg36-08go18146 Research and Development For Novel Tes Syssupporting

confidence: 81%

“…The models assume a plant life of 30 years and the geographic location used is Daggett, CA, where the annual DNI is among the highest in the U.S. The HTF used in the CSP plant integrated with Rankine power cycle corresponds to 60% NaNO 3 -40%KNO 3 (Solar Salt) [69] while that used in CSP plant integrated with s-CO2 power cycle corresponds to KCl-MgCl 2 [72].…”

Section: De-fg36-08go18146 Research and Development For Novel Tes Sysmentioning

confidence: 99%

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Research and Development for Novel Thermal Energy Storage Systems (TES) for Concentrating Solar Power (CSP)

Faghri¹,

Bergman²,

Pitchumani³

2013

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Executive Summary:The overall objective was to develop innovative heat transfer devices and methodologies for novel thermal energy storage systems for concentrating solar power generation involving phase change materials (PCMs). Specific objectives included embedding thermosyphons and/or heat pipes (TS/HPs) within appropriate phase change materials to significantly reduce thermal resistances within the thermal energy storage system of a large-scale concentrating solar power plant and, in turn, improve performance of the plant. Experimental, system level and detailed comprehensive modeling approaches were taken to investigate the effect of adding TS/HPs on the performance of latent heat thermal energy storage (LHTES) systems. Experimental results proved the superior performance of HPs to increase the heat transfer rates compared to finned and non-finned cases. Quantitatively, inclusion of heat pipes increased PCM melting rates by approximately 60%, while the fins were not as effective. During solidification, the heat pipe-assisted configuration transferred approximately twice the energy between a heat transfer fluid and the PCM, relative to both the fin-assisted LHTES and the non-heat pipe, non-fin configurations.Comprehensive multiphase multi-dimensional simulations were conducted to provide a better understanding of the fundamental physical phenomena involved in thermal energy storage in a phase change media with embedded TS/HPs, and also to provide input for the system level model. A system level model, leveraged by the input from the comprehensive model, was developed to predict the response of large-scale TS/HP-assisted LHTES systems in a computationally-effective manner. Consistent with the experimental results, the results of the system level model also demonstrated a significant increase in heat transfer rates associated with HP-assisted LHTES systems.The developed system level model was employed to predict the performance of a large-scale LHTES system utilizing multiple PCMs in a cascaded configuration. It was shown that the maximum exergy recovery can be achieved by using a cascaded configuration. Optimization studies were performed using the system level model and the preferred configurations of HPs in the LHTES systems were identified. Exergy analysis of LHTES systems was carried out considering the practical constraints imposed on the system in solar applications. Novel guidelines were proposed for design and optimization of LHTES systems for solar applications. Economic aspects of TS/HPassisted LHTES systems were also investigated and it was shown that these systems are cost competitive with the state of the art thermal energy storage systems currently in use. DE-FG36-08GO18146Research and Development for Novel TES Systems for CSP University of Connecticut 3 Background:Energy storage capability is desirable in solar and wind electric power applications due to the intermittent nature of the energy generated. In solar thermal generation, thermal energy storage is the preferred energy storage mode [1]...

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“…Employing the above cost rates, for a two-tank molten salt thermal storage system shows a total cost of $26.72/kWh t , which comes close to the $26.22/kWh t value reported in Ref. [69].…”

Section: De-fg36-08go18146 Research and Development For Novel Tes Syssupporting

confidence: 81%

Section: De-fg36-08go18146 Research and Development For Novel Tes Sysmentioning

confidence: 99%

Research and Development for Novel Thermal Energy Storage Systems (TES) for Concentrating Solar Power (CSP)

Faghri¹,

Bergman²,

Pitchumani³

2013

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“…As can be seen in Figure 12, the fluid level of the hot storage tank is maintained at the maximum (10 m) over several Figure 13 illustrates the comparison of total available wind energy utilization of the system between using and not using DH and TES. The total energy utilization is defined by Equation (21). The result shows that the daily utilizations of the WPP system (without using DH and TES) keep at a very low level (from 8.3% to 58.8%), while the daily utilizations of the WTES system are much higher (from 65.0% to 100.0%).…”

Section: Operation and Performance Of The Integrated Systemmentioning

confidence: 99%

“…The molten salt is chosen for energy storage because it is recognized as one of the best HTF in TES [18,19], and the low cost of molten salt TES (MSTES) makes the projects economically applicable. The two-tanks MSTES system option has a unit cost of $10-20/kWh depending on storage capacity [20,21]. The concept of wind power utilizing direct thermal energy conversion and TES was proposed and studied by Okazaki [22], in which a cost estimation of the wind powered TES system becoming the most economical system than that of conventional wind power was obtained.…”

Section: Introductionmentioning

confidence: 99%

“…A number of studies have investigated the integration of CSP and TES, considering the various factors like the dynamic processes of TES system charge and discharge [32], the changes of heat transfer in the heat exchanger [33], the estimation method of TES costs [21], the control of the power output [34], etc. Moreover, the thermal energy from solar irradiance can be absorbed by TES and then used to feed the heat load.…”

Section: Introductionmentioning

confidence: 99%

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A Wind Power Plant with Thermal Energy Storage for Improving the Utilization of Wind Energy

et al. 2017

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Abstract:The development of the wind energy industry is seriously restricted by grid connection issues and wind energy generation rejections introduced by the intermittent nature of wind energy sources. As a solution of these problems, a wind power system integrating with a thermal energy storage (TES) system for district heating (DH) is designed to make best use of the wind power in the present work. The operation and control of the system are described in detail. A one-dimensional system model of the system is developed based on a generic model library using the object-oriented language Modelica for system modeling. Validations of the main components of the TES module are conducted against experimental results and indicate that the models can be used to simulate the operation of the system. The daily performance of the integrated system is analyzed based on a seven-day operation. And the influences of system configurations on the performance of the integrated system are analyzed. The numerical results show that the integrated system can effectively improve the utilization of total wind energy under great wind power rejection.

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A novel solar assisted Kalina cycle system for waste heat utilization in thermal power plants

Khankari

Karmakar

2020

Intl J of Energy Research

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In the conventional coal power plants, substantial amount of energy loss takes place through condenser, fluegas and coal mills rejection. Separate studies based on these waste heat resources with single Kalina Cycle System (KCS) in each case shows improvement in plant efficiency with additional power generation but the present study shows the combined waste heat utilization of condenser, fluegas and coal mill rejection in a 500MW e subcritical (SubC) coalfired thermal power plant using single solar assisted KCS. The modified configuration reduces the system complexity, space requirement and irreversibility by using less number of equipments. The system is thermodynamically modelled by MS-Excel macros for analysing the system performance at different conditions. The study shows that an additional electricity generation of about 10 738.42 kW increases the plant net energy and exergy efficiencies by about 0.852% and 0.761% points, respectively resulting in reduction of CO 2 emission by about 8.78 tons per hour at 55 K degree of solar heating. About 55.75 K and 7.20 K are the optimum Log Mean Temperature Difference (LMTD) values of the evaporator and steam condenser, respectively that yields the maximum net energy output economically at 12.60 bar operating pressure. Effect of solar energy variation on system performance is also carried out by varying the degree of solar heating. Economic analysis of the proposed system is also performed by considering 25 years of equipment life and a loan interest of about 14%. The cost of electricity and simple payback period (SPP) of solar assisted KCS are about Rs. 0.83/kWh and 1.19 years, respectively, at 55 K degree of solar heating (optimum). The study further shows that the levelized cost of excess electricity generation by solar heater is lower than the standalone solar thermal power plant by about 53.78%.

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Developing a Cost Model and Methodology to Estimate Capital Costs for Thermal Energy Storage

Cited by 47 publications

References 7 publications

Research and Development for Novel Thermal Energy Storage Systems (TES) for Concentrating Solar Power (CSP)

Research and Development for Novel Thermal Energy Storage Systems (TES) for Concentrating Solar Power (CSP)

A Wind Power Plant with Thermal Energy Storage for Improving the Utilization of Wind Energy

A novel solar assisted Kalina cycle system for waste heat utilization in thermal power plants

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