The Significance of Bypass Transition on the Annual Energy Production of an Offshore Wind Turbine (2021)
Journal Article
Duffy, A., Ingram, G., & Hogg, S. (2022). The Significance of Bypass Transition on the Annual Energy Production of an Offshore Wind Turbine. Wind Energy, 25(4), 772-787. https://doi.org/10.1002/we.2697

Awareness of Leading-Edge Erosion (LEE) on wind turbine blades, and the impacts it can have on Annual Energy Production (AEP) have increased significantly over recent years. This is especially important in offshore environments, where a combination o... Read More about The Significance of Bypass Transition on the Annual Energy Production of an Offshore Wind Turbine.

Validation of a non-contact technique for torque measurements in wind turbines using an enhanced transient FSV approach (2019)
Journal Article
Zhang, G., Zappalá, D., Crabtree, C., Donaghy-Spargo, C., Hogg, S., & Duffy, A. (2020). Validation of a non-contact technique for torque measurements in wind turbines using an enhanced transient FSV approach. Measurement, 151, Article 107261. https://doi.org/10.1016/j.measurement.2019.107261

In-service turbine monitoring is essential for maximizing the wind energy contribution to the global energy budget. Measurement of turbine shaft torque under transient wind conditions is fundamental to develop reliable condition monitoring techniques... Read More about Validation of a non-contact technique for torque measurements in wind turbines using an enhanced transient FSV approach.

Investigating wind turbine dynamic transient loads using contactless shaft torque measurements (2019)
Journal Article
Zappalá, D., Crabtree, C., & Hogg, S. (2019). Investigating wind turbine dynamic transient loads using contactless shaft torque measurements. Journal of Engineering, 2019(18), 4975-4979. https://doi.org/10.1049/joe.2018.9361

The wind industry is showing increasing awareness about the importance of long-term direct shaft mechanical torque measurements to fully understand wind turbine (WT) dynamics, adopt proactive solutions for extreme load mitigation and enhance conditio... Read More about Investigating wind turbine dynamic transient loads using contactless shaft torque measurements.

Directory of UK Based Test and Demonstration Facilities for Wind Technologies (2018)
Report
Zappalá, D., Crabtree, C., & Hogg, S. (2018). Directory of UK Based Test and Demonstration Facilities for Wind Technologies. [No known commissioning body]

The UK’s extensive wind resource and rich history in the energy industry have made the UK internationally leading in both academic understanding and technology development capability in the wind energy sector. The sector is continuously and dynamical... Read More about Directory of UK Based Test and Demonstration Facilities for Wind Technologies.

Geothermal Potential of the Global Oil Industry (2018)
Book Chapter
Gluyas, J., Auld, A., Adams, C., Hirst, C., Hogg, S., & Craig, J. (2019). Geothermal Potential of the Global Oil Industry. In B. I. Ismail (Ed.), Renewable geothermal energy explorations (1-11). InTechOpen. https://doi.org/10.5772/intechopen.81062

There are around 40 new geothermal power projects commissioned in each of the last few years. Growth of the market is around 5% annually and current installed capacity is about 13,300 MW with about the same in development in 24 countries. These figur... Read More about Geothermal Potential of the Global Oil Industry.

Investigating wind turbine dynamic transient loads using contactless shaft torque measurements (2018)
Conference Proceeding
Zappalá, D., Crabtree, C., & Hogg, S. (2018). Investigating wind turbine dynamic transient loads using contactless shaft torque measurements.

Application of fluidic curtains to turbine rotor tip seal geometries. (2018)
Conference Proceeding
Oslo, Norway, June 11–15, 2018. https://doi.org/10.1115/gt2018-75835

Fluidic curtain sealing has recently been shown to offer strong potential especially when a combination of fluidic curtain and a conventional labyrinth seal is used. A series of fundamental dimensionless ratios have been proposed and the design space... Read More about Application of fluidic curtains to turbine rotor tip seal geometries..

Using Fluidic Curtains to Reduce Turbine Leakage (2017)
Conference Proceeding
MacCalman, J., Hogg, S. H., Ingram, G., Williams, R., & Tibos, S. (in press). Using Fluidic Curtains to Reduce Turbine Leakage.

Demonstration of a Dynamic Clearance Seal in a Rotating Test Facility. (2017)
Conference Proceeding
Messenger, A., Williams, R., Ingram, G., Hogg, S., Tibos, S., Seaton, J., & Charnley, B. (in press). Demonstration of a Dynamic Clearance Seal in a Rotating Test Facility.

UK Wind Energy Technologies (2016)
Book
Hogg, S., & Crabtree, C. (Eds.). (2016). UK Wind Energy Technologies. Routledge

Wind Energy: UK Experiences and Offshore Operational Challenges (2015)
Journal Article
Crabtree, C., Zappalá, D., & Hogg, S. (2015). Wind Energy: UK Experiences and Offshore Operational Challenges. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 229(7), 727-746. https://doi.org/10.1177/0957650915597560

This paper presents a discussion of the development of wind energy generation in the United Kingdom and the challenges faced by the wind industry including reliability, performance and condition monitoring, particularly in the offshore environment. T... Read More about Wind Energy: UK Experiences and Offshore Operational Challenges.

A Dynamic Clearance Seal for Steam Turbine Application. (2015)
Conference Proceeding
Messenger, A., Williams, R., Ingram, G., Hogg, S., Tibos, S., & Seaton, J. (2015). A Dynamic Clearance Seal for Steam Turbine Application. In Proceedings of the ASME Turbo Expo 2015: Turbine Technical Conference and Exposition, June 15-19, 2015, Montreal, Quebec, Canada. Volume 8: Microturbines, Turbochargers and Small Turbomachines; Steam Turbines. https://doi.org/10.1115/gt2015-43471

Effective sealing in turbomachinery reduces the leakage flow bypassing the turbine blades and also reduces the losses where the leakage flow mixes with the primary flow. In general the clearance should be as small as possible but is limited by therma... Read More about A Dynamic Clearance Seal for Steam Turbine Application..

Experimental Validation of a Curtain Type Fluidic Jet Seal on a Turbine Rotor Shroud (2015)
Conference Proceeding
Montreal, Quebec, Canada, June 15–19, 2015. https://doi.org/10.1115/gt2015-42624

This paper describes the design and testing of a fluidic “air-curtain” type seal application to reduce tip leakages on a small high-speed single stage axial turbine. The initial experimental investigations were carried out to demonstrate the applicat... Read More about Experimental Validation of a Curtain Type Fluidic Jet Seal on a Turbine Rotor Shroud.

Geothermal Energy – the Global Opportunity (2015)
Journal Article
Adams, C., Auld, A., Gluyas, J., & Hogg, S. I. (2015). Geothermal Energy – the Global Opportunity. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 229(7), 747-754. https://doi.org/10.1177/0957650915590704

Exploitation of geothermal energy offers a consistent and secure low carbon energy supply. Geothermal energy resources are associated with a variety of geological settings, are available at temperatures ranging from a few tens of degrees to several h... Read More about Geothermal Energy – the Global Opportunity.

Efficient Methods for Predicting Low Pressure Steam Turbine Exhaust Hood and Diffuser Flows at Design and Off-Design Conditions (2015)
Journal Article
Burton, Z., Ingram, G., & Hogg, S. (2015). Efficient Methods for Predicting Low Pressure Steam Turbine Exhaust Hood and Diffuser Flows at Design and Off-Design Conditions. Journal of Engineering for Gas Turbines and Power, 137(8), https://doi.org/10.1115/1.4029599

The exhaust hood of a steam turbine is an important area of turbomachinery research as its performance strongly influences the power output of the last stage blades (LSB). This paper compares results from 3D simulations using a novel application of t... Read More about Efficient Methods for Predicting Low Pressure Steam Turbine Exhaust Hood and Diffuser Flows at Design and Off-Design Conditions.

Power production via North Sea Hot Brines (2014)
Journal Article
Auld, A., Hogg, S., Berson, A., & Gluyas, J. (2014). Power production via North Sea Hot Brines. Energy, 78, 674-684. https://doi.org/10.1016/j.energy.2014.10.056

Traditionally the power demand of offshore oil platforms is delivered by on-platform gas turbines. Natural gas to fuel these turbines is usually separated from the produced oil. However, in ageing fields as oil production declines so does the associa... Read More about Power production via North Sea Hot Brines.

The influence of condenser pressure variation and tip leakage on low pressure steam turbine exhaust hood flows (2014)
Journal Article
Burton, Z., Ingram, G., & Hogg, S. (2014). The influence of condenser pressure variation and tip leakage on low pressure steam turbine exhaust hood flows. Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 228(4), 370-379. https://doi.org/10.1177/0957650914524190

This paper aims to highlight the importance of the accurate computational modelling of both the inlet and outlet exhaust hood boundary conditions. The computations presented are calculated using the public domain low pressure exhaust diffuser test ca... Read More about The influence of condenser pressure variation and tip leakage on low pressure steam turbine exhaust hood flows.

The Influence of Inlet Asymmetry on Steam Turbine Exhaust Hood Flows (2013)
Journal Article
Burton, Z., Hogg, S., & Ingram, G. (2014). The Influence of Inlet Asymmetry on Steam Turbine Exhaust Hood Flows. Journal of Engineering for Gas Turbines and Power, 136(4), Article 042602. https://doi.org/10.1115/1.4026003

It has been widely recognized for some decades that it is essential to accurately represent the strong coupling between the last stage blades (LSB) and the diffuser inlet, in order to correctly capture the flow through the exhaust hoods of steam turb... Read More about The Influence of Inlet Asymmetry on Steam Turbine Exhaust Hood Flows.

Organic Rankine cycles in waste heat recovery: a comparative study (2013)
Journal Article
Auld, A., Berson, A., & Hogg, S. I. (2013). Organic Rankine cycles in waste heat recovery: a comparative study. International Journal of Low-Carbon Technologies, 8(Supplement 1), 9-18. https://doi.org/10.1093/ijlct/ctt033

A theoretical study of organic Rankine cycles (ORCs) powered by three different waste heat sources is presented. The heat sources, all found in industrial processes, span a range of energy scales capable of powering ORCs from ∼10 kW to 10 MW. A novel... Read More about Organic Rankine cycles in waste heat recovery: a comparative study.

Offshore Wind Farm Asset Management: Past Experiences and Future Challenges. (2013)
Conference Proceeding
Williams, R., Crabtree, C., & Hogg, S. (2013). Offshore Wind Farm Asset Management: Past Experiences and Future Challenges. In Proceedings of the ASME Turbo Expo 2013: Turbine Technical Conference and Exposition. Volume 8: Supercritical CO2 Power Cycles; Wind Energy; Honors and Awards. San Antonio, Texas, USA, June 3–7, 2013. https://doi.org/10.1115/gt2013-94434

This paper considers the asset management of offshore wind farms and, in particular, how this will change as wind farms increase significantly in capacity and move to sites further offshore. Health monitoring, industrial operational structures, infra... Read More about Offshore Wind Farm Asset Management: Past Experiences and Future Challenges..