Showcase Scalloway

Scalloway HarbourScalloway is an important fishing harbour situated on the west side of the Shetland Islands. The relatively small size and the large variety of activities within the harbour area make this site a unique and interesting show case for the uptake of smart grid and renewable energy solutions in a harbour area.

Fishing harbours such as Scalloway have considerable environmental impacts with high CO2 emissions, water usage and fish waste. The energy demand is high due to the refrigeration and fish processing plants contained within the harbour area, along with transportation, heating systems, net cleaning and shore power for marine vessels whilst in the harbour.

The aim of the show case is to improve the harbour sustainability, improving efficiency and facilitate the possibility for the intervention of renewables, smart grids and virtual power plants in the area.

What we have done

DataloggersIn collaboration with the harbour authority and the local organisations, Pure Energy Centre® has developed a set of criteria to be used for an effective monitoring of the energy consumption of the Harbour. At the same time, the large potential of renewables energy available in Scalloway has been investigated, with the objective to assess the potential benefits in terms of economic value and CO2 emissions. The showcase aims to increase the uptake of Renewable Energy in the harbour area by integrating the existing energy network with smart grid, virtual power plant and electric vehicles in order to generate a new sustainable energy management system for the harbour.

The outcomes of the energy monitoring strategy will allow the harbour community to analyse their energy consumption and behaviour, leading to the development of new and effective energy management strategies to reduce their energy costs and become more competitive, locally, regionally, nationally and internationally. The below summarises what we have done:

  • Development of Universal Energy Analysis Strategy: The strategy aims at reducing both expenditures and CO2 emissions while increasing energy efficiency as well as green technologies in a harbour setup. The aim was also to introduce advanced e-mobility, smart grids and other e-based technologies such as remote energy monitoring systems to the harbour stakeholders.
  • Site Analysis and Monitoring: As part of the strategy, the energy profiles of the different Scalloway harbour entities has been produced. This was achieved by installing a multitude of advanced data loggers along with the latest weather station system and logging and analysing the harbour’s data for over a year. In addition a series of meetings with the harbour stakeholders were held where energy bills and harbour energy profiles were discussed. From this a clear picture of the harbour energy consumption and the possibilities for Demand Side Management were achieved.  Meanwhile the energy awareness of Scalloway harbour’s companies increased.
  • PUREcomputerinterfaceAssessment of Renewable Energy: Electricity can potentially be generated locally by a Renewable Energy System (RES). Such a system could reduce the amount of energy imported from the grid, reduce the cost of electricity consumed and therefore reduce CO2 emissions associated with the processing plant within the harbour. The Renewable Energy systems that have been considered for Scalloway Harbour are Wind and Solar Energy.
  • Development of Analysis Tools: The dataloggers have logged many parameters such as electrical consumption, weather data, temperature, oil consumption and others. This resulted in excess of 15 billion values being logged and stored electronically. The processing of such a large amount of data cannot be done manually. For this reason, an Analysis tool was developed by using advanced computer programming language for assessing intelligently large quantities of data. It includes a user-friendly graphic interface that provides guidelines on using the tool and provides quick and intuitive output results based on the type of analysis selected.
  • Energy Efficiency Recommendation for Scalloway Harbour:  Thanks to the implementation of the Universal Energy Analysis Strategy it has been possible to discover a series of key issues that could be addressed to reduce the energy expenditure of the principal energy user in Scalloway. They could be resolved through the implementation of a series of recommendations. Some of the recommendations included the installation of a photovoltaic system at one of the Scalloway Harbour Stakeholders, the reduction of the use of standby equipment, the reduction of equipment starting up times and the set up of a new energy efficiency internal policies and procedures.  The Energy Strategy produced can be rolled out to all small to medium harbours but recommendations need to reflect what is technically feasible in each individual harbour area.

Findings and Recommendations

  • The application of the strategy showed that the use of a smart grid can potentially provide benefits for Scalloway harbour and could be applied to other European small to medium harbours. It was found that the Distribution Network Operator (DNO) should be fully involved in the implementation of a smart grid solution. In Shetland plans are currently being implemented by the DNO to establish a smart grid through the North Isles New Energy Solutions (NINES) project. It is hoped that once this has been setup, the benefits that smart grids can bring will be implemented in Scalloway harbour.
  • Historically in the Shetland it has always been a great challenge maintaining and managing grid stability, and the inclusion of increasing quantities of renewable energy systems has made it even more difficult. In fact, it is now extremely difficult to connect a renewable production system to the grid.  This provides a compelling argument for the implementation of smart grid technologies in the Shetland Islands.
  • By applying the Energy Efficiency Recommendations, the harbour could save £33,000 per year from a capital investment of £340,000. This means there would be a 10 year payback period and by following these recommendations, harbour stakeholders have the potential to become more profitable, and create more jobs and wealth for the local community.
  • As Scalloway harbour is connected to a small electricity network grid independent from the mainland United Kingdom, the implementation of new e-technologies such as smart grids is limited due to the small scale of the network and reduced flexibility on the energy demand side. Smart grid technologies are crucial to harbours and easier to implement in a grid connected setup, if a lot of flexibility is available.

Scalloway Harbour – Current Implementation

Following on from the full set of recommendations, a number of Scalloway harbour organisations have undertaken measures to reduce their energy consumption and increase energy awareness as follows:

  • It was recommended that all harbour staff needed to be made aware of the harbour’s overall energy consumption on a regular basis. As such some of the stakeholders decided to install a new monitoring display showing live energy consumption. This aims to support an increase in energy awareness among the harbour staff, which will lead to reduced consumption and increased overall harbour efficiency. The display will also be installed at a location where customers and clients will be able to visualize it, thereby providing a direct positive impact which will also improve their green marketing credentials
  • During the data analysis process, it was shown that one of the Ice Plants was not efficient and was causing an increase in energy consumption, hence higher energy bills. The recommendation to replace the plant was acted upon with the purchase of a new, modern system.
  • In addition to the above, it was found that a heating boiler was aged and not efficient. The boiler has been upgraded to a more effective burner.

Reports and more information


  • The showcase is attracting interest from around the world; Mike MacKenzie, MSP visited the harbour to hear more about the project. Mr MacKenzie said
    ‘I was delighted to have the opportunity of visiting Scalloway harbour and to see the innovative energy audit being conducted which aims to improve the energy efficiency of this busy harbour as well as providing lessons for elsewhere.’ Read more here »
  • The Harbour Master from the Falkland Islands, Malcolm Jamieson, visited the harbour to hear more about the project. Malcolm said ‘It is very interesting to see what the Pure Energy Centre is doing at the Scalloway Harbour, with harbour developments in the Falklands, it is important to keep abreast of what other harbours around the world are achieving with regards to increasing their sustainability’. Read more here »
  • Currently a monitoring system of the harbour has been developed by Pure Energy® Centre and Robert Gordon University. Distributed sensors and data loggers have been installed in the most important electrical nodes and process within the harbour. The monitoring system is currently logging 112 electrical parameters, 37 weather parameters, 1 room temperature and 1 oil flow consumption.
  • The relatively small size and the large variety of activities within the harbour area make this site a unique interesting show case for the uptake of smart grid and renewable energy solutions into a harbour area.  Read more in e-harbours #1



  • Pure Energy Centre: Elizabeth Johnson, elizabeth.johnson (at.) T: +44 (0) 1957 711 410







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