Thermal energy storage for integrated gasification combined-cycle power plants

Abstract

Pacific Northwest Laboratory Operated for the U.S. Department of Energy by Battelle ~e m o r i a l Institute DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor Battelle Memorial Institute, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof, or Battelle Memorial Institute. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.

Evaluation of diurnal thermal energy storage combined with cogeneration systems

“…Oil/rock TES is less expensive than molten salt TES, but it is limited to low-temperatureapplications. Oil/rock TES is described in more detail in Drost et al (1990).…”

“…The capital cost models for the heat recovery steam generator,oil and salt heaters, and oil/rock and salt storage systemswere based directly on cost models developed for these components (Drost, et al 1990). The values calculatedfrom the equations includedirect costs, indirect costs, contingency,and sales tax, but not startup and working capital, lhe cost models were updated to 1990 $ using the Chemical EngineeringPlant Cost Index for heat exchangersand tanks (ChemicalEngineeringMagazine 1990).…”

“…The fixed labor (i.e, fixed for • a given plant size) was assumed to be proportionalto initialcapital cost, with the ratio varying as a function of steam productioncapacity. Data presented in Drost, et al (1990) and EPRI (1989) describingthe variation of fixed O&M with power plant size was combined with the data from Brown, et al (1991), and resulted in the followingestimatingrelation"…”

Simulation of diurnal thermal energy storage systems: Preliminary results

“…The selection of a specific storage system depends on the quality and quantity of recoverable thermal energy and on the nature of the thermal load to be supplied from the storage system. The focus of this investigation is to evaluate the simulation tool to design and optimize diurnal TES systems; therefore, the TES systems selected for evaluation were based on previous studies by Drost et al (1989Drost et al ( , 1990 and Somasundaram et al (1992Somasundaram et al ( , 1993. The two different TES systems selected for the base-case simulations using TRNSYS were: 1) one-tank oil/rock TES system and 2) the two-tank molten nitrate salt TES system.…”

Thermal Energy Storage For An Integrated Coal Gasification Combined-cycle Power Plant

“…This latter design exchanges heat between the molten salt and turbine exhaust gases by direct counter-current contact of the two fluids through a packed tower. A discussionof current experience and theory with direct-contactheat exchanger design and performance is presented in Drost [5].…”