...Jacob Wenner; Michael J. Wagner The growing use of intermittent renewables in electrical grids increasingly motivates load-following operations as a crucial capability of dispatchable power plants. However, frequent load variations in steam generation equipment can cause premature heat exchanger...

... for long-duration storage. However, overall system performance also depends on the efficiency of the particle-to-working fluid heat exchangers (HXs). Moving packed-bed particle-to-supercritical CO 2 (sCO 2 ) HXs have been extensively studied in SHS systems. Integrating the oxidation reactor...

... cavity receiver is built by collaborators at the Colorado School of Mines and their data are used for model validation. In this experimental setup, near IR quartz lamp is used to provide flux to the vertical wall of the heat exchanger. The system is modeled using the discrete element method...

... cooling at an ambient temperature of up to 40 °C and to reduce the cost of power generation. Solid particles have been proposed as a possible high-temperature heat transfer or storage medium that is inexpensive and stable at high temperatures above 1000 °C. The particle/sCO 2 heat exchanger (HX) provides...

... (SPT) is a type of CSP system that is of particular interest in this research because it can operate at relatively high temperatures. The present SPT-TES field comprises of heliostat field mirrors, a solar tower, a receiver, heat exchangers, and two molten-salt TES tanks. The main thermoeconomic...

... loop earth to air heat exchanger (underground air tunnel) in the cooling mode. The experimental system was commissioned in June 2009 and experimental data collecting have been conducted since then. The data, consisting of hourly thermodynamics records a year cooling period, 2009–2011, were measured...

...Hany Al-Ansary; Abdelrahman El-Leathy; Zeyad Al-Suhaibani; Sheldon Jeter; Dennis Sadowski; Abdulaziz Alrished; Matthew Golob An experimental study of the heat transfer characteristics of the bulk flow of sand in a sand–air heat exchanger is conducted. The study is conducted in the context...

... promises to reduce costs of energy storage and thus to reduce the costs of electricity generation. In addition, the storage concept could be applicable in the steel industry. The central element of the storage concept is an air-sand heat exchanger, which is presently under development. This paper describes...

...Aaron D. Wade; Jane H. Davidson; Julia F. Haltiwanger Prior studies of indirect water storage tanks that employ an immersed heat exchanger to discharge the stored energy identified two potential methods of improving the rate of energy extraction: (1) an internal baffle to increase the velocity...

...Yan Su; Jane H. Davidson A model of a thermal storage tank in which stored energy is extracted via an immersed heat exchanger is presented and used to predict transient temperature and velocity fields in tanks with and without baffles. The heat exchanger is modeled as a porous medium within...

... with an immersed heat exchanger. The modeled enclosure has an aspect ratio of 6:1 and is inclined at 30 deg to the horizontal. The heat exchanger is represented by a constant surface temperature horizontal cylinder positioned near the top of the enclosure. A scale analysis of the transient heat transfer process...

... Division, Sept. 2000; final revision, Jan. 2001. Associate Editor: M. Olszewski. 01 Sept 2000 01 Jan 2001 latent heat thermal energy storage thermal analysis temperature distribution melting solidification heat transfer Energy Storage Phase Change Heat Transfer Heat...