All Outputs (30)

How pressure affects costs of power conversion machinery in compressed air energy storage; Part I: Compressors and expanders (2024)
Journal Article

This study addresses a critical economic aspect in compressed air energy storage that has not been discussed much in existing literature: the impact of operating pressure on machinery capital cots. It aims to answer whether the cost per unit of power... Read More about How pressure affects costs of power conversion machinery in compressed air energy storage; Part I: Compressors and expanders.

How pressure affects costs of power conversion machinery in compressed air energy storage; part II: Heat exchangers (2024)
Journal Article

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

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

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

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

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

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

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

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

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

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

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

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 sign-preserving filter for signal decomposition (2018)
Journal Article

There are optimization problems in which an improvement in performance or a reduction in cost can be attained if the input signal of the system is split into multiple components. Splitting the signal allows customizing the design of the system’s hard... Read More about A sign-preserving filter for signal decomposition.

Load optimization for reducing the cost of an electric vehicle’s battery pack (2018)
Journal Article

This paper presents a study on the cost-optimization of the battery pack of a Nissan Leaf. The optimization is based on decomposing the load that the battery pack experiences into two components (low and high frequency), each of which will be handled... Read More about Load optimization for reducing the cost of an electric vehicle’s battery pack.

A series hybrid “real inertia” energy storage system (2018)
Journal Article

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.

Stability of packed bed thermoclines (2018)
Journal Article

© 2018 Packed bed thermoclines have attracted considerable interest as an economical method for storing large amounts of thermal energy. They are a constituent part of a range of proposed thermo-mechanical energy storage systems, such as Adiabatic Co... Read More about Stability of packed bed thermoclines.

Lowering the cost of large-scale energy storage: high temperature adiabatic compressed air energy storage (2017)
Journal Article

Compressed air energy storage is an energy storage technology with strong potential to play a significant role in balancing energy on transmission networks, owing to its use of mature technologies and low cost per unit of storage capacity. Adiabatic... Read More about Lowering the cost of large-scale energy storage: high temperature adiabatic compressed air energy storage.

Thermal Design of Linear Induction and Synchronous Motors for Electromagnetic Launch of Civil Aircraft (2017)
Journal Article

The engine size of modern passenger transport aircraft is principally determined by take-off conditions, since initial acceleration requires maximum engine power. An elec¬tromagnetic launch (EML) system could provide some or all of the energy require... Read More about Thermal Design of Linear Induction and Synchronous Motors for Electromagnetic Launch of Civil Aircraft.

The cold store for a pumped thermal energy storage system (2017)
Journal Article

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.