What did we do?
Net Zero is our ambition and we recognise that is quite possibly an impossible target, but it doesn’t stop us trying. We are constantly reviewing what is available and currently we have settled on a mix of air source heating, backed up by natural gas to provide the heating of the pool and the building. This is simply the most efficient form of heating currently available.
To power the building we are intending to extend the solar PV panels on the roof of the existing hall to cover the entire south East facing roof. We are also investigating the storage of power generated in batteries, with advice from one of the UK’s leading electrical companies called Gridserve.
Our Current eco approach is detailed below
The planned BEJSC swimming pool and pool house will be a challenging build in a Net Zero world. Specifically we need to have considered construction with a low Co2 footprint – the ability to travel from our local houses easily – a building that is either pre-fabricated off site or constructed on site – a pool plant/tank that has an approach with the lowest possible Co2 footprint to run using technology that exists today and is proven – the ability to scavenge heat easily with the building – the ability to ventilate excess heat easily from out of the building – as this will not be a passive energy model (we generate as much energy as we consume as we use it) some local energy generation services will be required to offset the difference.
We need to consider the following Eco challenges
The design – usability – flexibility (the tank will last 60-70 years) – easy to maintain – long lasting – uses recyclable materials – uses materials that have been recycled.
A modern yet uncomplicated building with strong thought on bio diversity and blending into the current environment (green space) – with good access in a post pandemic world – with speed and lowered cost of construction that as much as possible is constructed in a pre fabricated fashion (think Huff House of swimming pools).
Easily able to be used 24/7 or less.
A building that has multiple pools to serve multiple users – can serve 100% of the local communities it resides in and is inclusive in approach.
Easy to maintain
The structural and build integrity of the pool by the nature of dealing with challenges to do with footfall , heat and humidity will need to be easy and long lasting in nature.
The vast majority of the raw materials used to construct the pool and pool house are recyclable – everything from the pool plant , pool tank, pool house and building framework will be constructed using materials that can be broken down and reused at the end of their working life cycle.
Uses materials that have been recycled
Most of the materials used to construct the pool and pool house are from recycled sources.
Traditionally after staffing costs – energy costs are the next largest cost of ownership consideration – around 30% of energy costs. The energy consumers in pools can be broken down into four key areas:
Ventilation: Around 50% of the energy cost in a pool environment is heating the air and dehumidifying it.
Water heating: Heating the pool and the showers is around 30% of the cost
Lighting: Around 7% of pool energy costs are lighting
Rotating equipment: Fans and pumps for the pool plant are around 8% of total energy bills.
So we have an energy consumption that is as follows:
Air (space heating) = 50%
Water (pool and showers) = 30%
Lighting = 7%
Rotating equipment (fans and pool pumps) = 8%
So how do we address the above:
1. Air – a combination of passive building design (to suppress heat loss and capture solar gain from the building) in combination with a ground source heat pump solution to vent excess heat into the ground during summer and recover heat from the ground in the winter – we look carefully at window design with Northern European standard triple glazing with an inert gas (to reduce humidity loss of energy through the glass) – we look carefully at heat escaping through door seals in the winter.
2. Water (pool and showers) – pool tank materials for efficiency to stop heat loss through the ground – recovering heat from the showers as we remove used water – using air source heat pump and/or biomass boiler for heat generation.
3. Lighting – use sun tubes – modern bulbs prolifically – light reflective paint – combination of in water and overhead lighting – a joined up photo voltaic roof and battery storage solution.
4. Rotating equipment – less pool water energy usage means lower need for pumps to be used to maintain pool temperature – modern efficient pump design – use of ultra violet in water filtration requires far less pool plant loading.