Brislington Park & Ride Renewables Study
Assessing the possibilities for renewable energy technologies at a Bristol Park & Ride site
Project duration: March 2004 to September 2004
The overall aims of the feasibility study were to investigate a range of renewable energy options for the Brislington Park & Ride site, produce a set of recommendations and explore the opportunities for community involvement and renewable energy awareness-raising among the site’s users. The specific objectives were:
- to undertake a technical options appraisal for renewable energy use at the site
- to produce best-estimate costings and discounted payback periods for the range of
- to identify sources of finance for implementation of measures
- to evaluate the environmental benefits, legal considerations and planning consent issues relevant to the proposed renewable energy installations
- to examine the potential for education and awareness-raising of the renewable energy aspects of the site among Park & Ride users.
This project began in 2004. An initial site survey identified the following as having potential for further consideration as part of a feasibility study:
solar water heating
Small-scale wind power on the site is thought to hold potential due to the relatively open aspect in the prevalent wind direction and the 24-hour electrical demand (i.e. the use of the site buildings during the day and lighting of the area at night). The annual average wind speed was subsequently modelled to obtain estimates of energy yields from different size turbines.
The site building has a prefabricated sloped roof, part of which is south facing with minimal shading. The potential therefore exists to install PV and/or solar water heating systems on appropriate faces, also providing a highly visible demonstration of the technology.
These factors were assessed with regard to technical and economic feasibility, along with implications for planning and awareness raising amongst the site’s users and local residents.
The study concluded that all of the systems considered are technically feasible with financial feasibility being heavily dependent on levels of grant funding obtained.
For the modelled site wind speeds, capital grant levels would need to be around 70% for a payback period of below 10 years, based on a 15kW turbine. These levels of grant funding are achievable and the high public profile of the site together with the significant potential for awareness raising are positive factors in attracting such funding.
The site office has sufficient south-facing roof space to accommodate a retrofit SWH system and/or a solar PV system. Both systems, however, would result in long payback periods of over 50 years at the 50% grant level.
All systems considered will be highly visible to site users and will offer good awareness-raising opportunities for renewable energy. The study also recommends that a community consultation exercise is undertaken to inform local householders of the project at an early stage.