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How pressure affects costs of power conversion machinery in compressed air energy storage; part II: Heat exchangers (2024)
Journal Article
Baniamerian, Z., Garvey, S., Rouse, J., Cárdenas, B., Pottie, D. L., Barbour, E. R., & Bagdanavicius, A. (2024). How pressure affects costs of power conversion machinery in compressed air energy storage; part II: Heat exchangers. Journal of Energy Storage, 86(Pt A), Article 111138. https://doi.org/10.1016/j.est.2024.111138

In the field of compressed air energy storage, a critical economic aspect that has been overlooked in existing literature relates to the influence of storage pressure on the capital cost of power conversion system. In Part I, a comprehensive study wa... Read More about How pressure affects costs of power conversion machinery in compressed air energy storage; part II: Heat exchangers.

A directly charged thermal store for compressed air energy storage systems (2023)
Journal Article
Cárdenas, B., & Garvey, S. (2023). A directly charged thermal store for compressed air energy storage systems. Journal of Energy Storage, 71, Article 108183. https://doi.org/10.1016/j.est.2023.108183

This paper discusses the design of a heat storage unit with integrated heat exchangers (TES + HX), which is intended to work in a Compressed Air Energy Storage (CAES) system. The unit can be charged directly by the system's stream of pressurised air,... Read More about A directly charged thermal store for compressed air energy storage systems.

Comparative Analysis of Isochoric and Isobaric Adiabatic Compressed Air Energy Storage (2023)
Journal Article
Pottie, D., Cardenas, B., Garvey, S., Rouse, J., Hough, E., Bagdanavicius, A., & Barbour, E. (2023). Comparative Analysis of Isochoric and Isobaric Adiabatic Compressed Air Energy Storage. Energies, 16(6), Article 2646. https://doi.org/10.3390/en16062646

Adiabatic Compressed Air Energy Storage (ACAES) is regarded as a promising, grid scale, medium-to-long duration energy storage technology. In ACAES, the air storage may be isochoric (constant volume) or isobaric (constant pressure). Isochoric storage... Read More about Comparative Analysis of Isochoric and Isobaric Adiabatic Compressed Air Energy Storage.

The effect of a nuclear baseload in a zero-carbon electricity system: An analysis for the UK (2023)
Journal Article
Cárdenas, B., Ibanez, R., Rouse, J., Swinfen-Styles, L., & Garvey, S. (2023). The effect of a nuclear baseload in a zero-carbon electricity system: An analysis for the UK. Renewable Energy, 205, 256-272. https://doi.org/10.1016/j.renene.2023.01.028

This paper explores the effect of having a nuclear baseload in a 100% carbon-free electricity system The study analyses numerous scenarios based on different penetrations of conventional nuclear, wind and solar PV power, different levels of overgener... Read More about The effect of a nuclear baseload in a zero-carbon electricity system: An analysis for the UK.

Short-, medium-, and long-duration energy storage in a 100% renewable electricity grid: A UK case study (2021)
Journal Article
Cárdenas, B., Swinfen-Styles, L., Rouse, J., & Garvey, S. D. (2021). Short-, medium-, and long-duration energy storage in a 100% renewable electricity grid: A UK case study. Energies, 14(24), Article 8524. https://doi.org/10.3390/en14248524

Energy storage will be required over a wide range of discharge durations in future zero-emission grids, from milliseconds to months. No single technology is well suited for the complete range. Using 9 years of UK data, this paper explores how to comb... Read More about Short-, medium-, and long-duration energy storage in a 100% renewable electricity grid: A UK case study.

A case study investigation into the risk of fatigue in synchronous flywheel energy stores and ramifications for the design of inertia replacement systems (2021)
Journal Article
Rouse, J., Garvey, S., Cárdenas, B., Hoskin, A., Swinfen-Styles, L., & Xu, W. (2021). A case study investigation into the risk of fatigue in synchronous flywheel energy stores and ramifications for the design of inertia replacement systems. Journal of Energy Storage, 39, Article 102651. https://doi.org/10.1016/j.est.2021.102651

Flywheels are an attractive energy storage solution for many reasons; high turnaround efficiencies, long cycling lives and high “ramp-up” power rates have all been noted in the literature. Novel flywheel based hybrid energy storage systems have also... Read More about A case study investigation into the risk of fatigue in synchronous flywheel energy stores and ramifications for the design of inertia replacement systems.

Analysis of the tribological interaction of a polytetrafluoroethylene-lined radial lip oil seal, shaft and lubricant sample (2021)
Journal Article
Shabbir, S., Garvey, S. D., Dakka, S. M., Rothwell, B. C., Su, R., Leach, R., & Weston, N. (2022). Analysis of the tribological interaction of a polytetrafluoroethylene-lined radial lip oil seal, shaft and lubricant sample. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 236(1), 123-143. https://doi.org/10.1177/13506501211005876

To investigate the tribological interaction and wear mechanisms of polytetrafluoroethylene-lined radial lip oil seals in service, a sleeve, seal and lubricant sample taken off a rotating rig are studied. The test was terminated at 72 h, after severe... Read More about Analysis of the tribological interaction of a polytetrafluoroethylene-lined radial lip oil seal, shaft and lubricant sample.

Seal Failure In Aerospace Applications -- Creating A Global Open-source Database (2021)
Journal Article
Shabbir, S., Garvey, S., Rothwell, B., & Dakka, S. (2021). Seal Failure In Aerospace Applications -- Creating A Global Open-source Database. Sealing Technology, 2021(2), 7-9. https://doi.org/10.1016/S1350-4789%2821%2900076-3

Seal failure in aerospace applications-creating a global open-source database Seals are essential components used in numerous applications across engineering. A seal is a component that impedes the flow of fluid through a given system. The word 'impe... Read More about Seal Failure In Aerospace Applications -- Creating A Global Open-source Database.

An Experimental Study of Contact Temperatures at Sealing Interface against Varying Shaft Surfaces (2021)
Journal Article
Shabbir, S., Garvey, S. D., Dakka, S. M., & Rothwell, B. C. (2021). An Experimental Study of Contact Temperatures at Sealing Interface against Varying Shaft Surfaces. Coatings, 11(2), Article 156. https://doi.org/10.3390/coatings11020156

Increased temperatures at the sealing interface between the seal and shaft can reduce the working life of a seal through elastomer aging, swelling and increased friction. Degradation of the seal due to increased temperatures can cause pre‐mature fail... Read More about An Experimental Study of Contact Temperatures at Sealing Interface against Varying Shaft Surfaces.

Experimental study of radial lip seals with different sleeve coatings (2020)
Journal Article
Shabbir, S., Garvey, S. D., Dakka, S. M., & Rothwell, B. C. (2020). Experimental study of radial lip seals with different sleeve coatings. Sealing Technology, 2020(3), 5-10. https://doi.org/10.1016/S1350-4789%2820%2930091-X

Radial Lip Seals with pre-loaded garter springs of 8.5oz, 12.5oz and 14oz are tested with 4 different sleeves to investigate various seal-sleeve combinations. To find optimum sleeve coating and seal combinations, leakage and performance is investigat... Read More about Experimental study of radial lip seals with different sleeve coatings.

A load-based approach for optimizing a packed-bed thermal store (2019)
Journal Article
Cárdenas, B., & Garvey, S. D. (2019). A load-based approach for optimizing a packed-bed thermal store. Journal of Energy Storage, 25, Article 100835. https://doi.org/10.1016/j.est.2019.100835

This paper presents a load-based optimization approach for improving the efficiency of a packed bed. The optimization is based on splitting the work-cycle of the thermal store into two frequency components: low and high. A packed bed is designed for... Read More about A load-based approach for optimizing a packed-bed thermal store.

Techno-economic optimization of a packed-bed for utility-scale energy storage (2019)
Journal Article
Cárdenas, B., Davenne, T., Wang, J., Ding, Y., Jin, Y., Chen, H., …Garvey, S. (2019). Techno-economic optimization of a packed-bed for utility-scale energy storage. Applied Thermal Engineering, 153, 206-220. https://doi.org/10.1016/j.applthermaleng.2019.02.134

The optimization of a packed bed for utility-scale applications is presented in this paper. The effects that particle size, aspect ratio and storage mass have on the roundtrip exergy efficiency of the store are thoroughly analysed. The paper seeks to... Read More about Techno-economic optimization of a packed-bed for utility-scale energy storage.

A series hybrid “real inertia” energy storage system (2018)
Journal Article
Rouse, J., Garvey, S., Cárdenas, B., & Davenne, T. (2018). A series hybrid “real inertia” energy storage system. Journal of Energy Storage, 20, 1-15. https://doi.org/10.1016/j.est.2018.08.006

The wide scale market penetration of numerous renewable energy technologies is dependent, at least in part, on developing reliable energy storage methods that can alleviate concerns over potentially interrupted and uncertain supplies. Many challenges... Read More about A series hybrid “real inertia” energy storage system.

The cold store for a pumped thermal energy storage system (2017)
Journal Article
Davenne, T., Garvey, S., Cardenas, B., & Simpson, M. (2017). The cold store for a pumped thermal energy storage system. Journal of Energy Storage, 14(2), https://doi.org/10.1016/j.est.2017.03.009

In recent years several proposals for thermodynamic cycles involving the compression and expansion of gas and thermal storage have been put forward as effective ways of storing energy. These include the work of Desrues [1] who proposed a thermal ener... Read More about The cold store for a pumped thermal energy storage system.

Novel stiffeners exploiting internal pressurisation to enhance buckling behaviour under bending loads (2016)
Journal Article
Polenta, V., Garvey, S. D., Chronopoulos, D., Long, A. C., & Morvan, H. (2016). Novel stiffeners exploiting internal pressurisation to enhance buckling behaviour under bending loads. Thin-Walled Structures, 105, https://doi.org/10.1016/j.tws.2016.04.002

The paper proposes a novel type of stiffener designed to bear bending loads by exploiting internal pressure effects. The stiffener is made of two adjacent thin-walled pipes (r/t?50) jointed with a connecting strip. Such a structure is shown to have h... Read More about Novel stiffeners exploiting internal pressurisation to enhance buckling behaviour under bending loads.

Electromagnetic launch systems for civil aircraft assisted take-off (2015)
Journal Article
Bertola, L., Cox, T., Wheeler, P., Garvey, S. D., & Morvan, H. (2015). Electromagnetic launch systems for civil aircraft assisted take-off. Archives of Electrical Engineering, 64(4), https://doi.org/10.1515/aee-2015-0039

This paper considers the feasibility of different technologies for an electromagnetic launcher to assist civil aircraft take-off. This method is investigated to reduce the power required from the engines during initial acceleration. Assisted launch h... Read More about Electromagnetic launch systems for civil aircraft assisted take-off.

Economic analysis of a hybrid energy storage system based on liquid air and compressed air (2015)
Journal Article
Pimm, A. J., Garvey, S. D., & Kantharaj, B. (2015). Economic analysis of a hybrid energy storage system based on liquid air and compressed air. Journal of Energy Storage, 4, 24-35. https://doi.org/10.1016/j.est.2015.09.002

A hybrid energy storage system is defined here as one which comprises two series-connected energy stores (using different storage technologies), only one of which is connected to the grid. Such a plant can take advantage of certain characteristics of... Read More about Economic analysis of a hybrid energy storage system based on liquid air and compressed air.

Compressed air energy storage with liquid air capacity extension (2015)
Journal Article
Kantharaj, B., Garvey, S. D., & Pimm, A. J. (2015). Compressed air energy storage with liquid air capacity extension. Applied Energy, 157, https://doi.org/10.1016/j.apenergy.2015.07.076

As renewable electricity generation capacity increases, energy storage will be required at larger scales. Compressed Air Energy Storage (CAES) at large scales, with effective management of heat, is recognised to have potential to provide affordable g... Read More about Compressed air energy storage with liquid air capacity extension.

Analysis of a wind turbine power transmission system with intrinsic energy storage capability (2015)
Journal Article
Garvey, S. D., Pimm, A. J., Buck, J. A., Woolhead, S., Liew, K. W., Kantharaj, B., …Brewster, B. D. (2015). Analysis of a wind turbine power transmission system with intrinsic energy storage capability. Wind Engineering, 39(2), 149-173. https://doi.org/10.1260/0309-524X.39.2.149

A wind turbine transmission system is described wherein mechanical power directly from the slow rotation of the shaft of a large wind turbine rotor is carried over to electrical power through a synchronous generator via the circulation of a high pres... Read More about Analysis of a wind turbine power transmission system with intrinsic energy storage capability.