GREEN LEAF ENGINEERING

Whitley Bay High School, Newcastle

Green Leaf Engineering were employed by SES to carry out the design, supply, installation, and commissioning of PV system in line with Whitley Bay High schools’ energy requirements.
Green Leaf Engineering were employed by SES to carry out the design, supply, installation, and commissioning of PV system in line with Whitley Bay High schools’ energy requirements.

INTRODUCTION 

The proposal consisted of the install of 1540 PV modules across 2 school buildings and several canopies within the school grounds. Works commenced from our appointment in January 2023, the PV modules installed on the main building and sports block were completed in March 2023 with the canopies due for completion in phase 3, which commences in September 2023. The below case study details the technical requirements on site, processes and involvement from Green Leaf as well as the challenges faced and the solutions proposed by Green Leaf as the MEP Contractor. 

SCOPE OF WORKS 

Main School building – The main school building comprises of a freestanding ballasted PV system on a flat roof. This includes 730 PV modules installed on ballasted PV frames in an east/west orientation on a 10’ pitch. There are 2no 110kW inverters and 2no 40kW inverters. Containment was installed across the roof to allow DC strings to be installed to 4no inverters installed on the roof. 

Sports Block – The Sports block is split into 3 levels. The east and the west levels are a flat roof freestanding ballasted PV system. This is 184 PV modules installed on ballasted PV frames in an east/west orientation on a 10’ pitch. The North upper level of the sports block is a south facing standing seam roof. The PV frames are fixed to the standing seams using specialist clamps so there is no need to penetrate the roof. The 142 PV Modules are then mounted onto the frames. There are 3no 40kW inverters on the sports block. Containment was installed across the roof to allow DC strings to be installed to the 3no inverters positioned in together on the roof. 

DETAILED DESIGN 

As part of the project, Green Leaf were employed on a design and build basis to produce a PV system for this project.  

Green Leaf carried this out utilising our in-house design team. Green Leaf’s design engineer ran the PV design through our PV simulator software, which factors in weather data from local weather stations as well as the sun position throughout the year and shading.  

This determined that a 10 pitch, east to west system would meet the desired yield. A higher quantity of PV modules can be installed using an east to west installation over a south facing install. ·This project has 3 different roof structure s, requiring 3 different types of installs: 

  • The main roof surface was an insulated flat roof which could not be penetrated. This required a freestanding ballasted system.  
  • The sports hall roof is a standing seam roof which could not be penetrated. A Seam clamp was used to mount the rails onto the standing seams.  
  • The canopy roofs are a corrugated sheet metal which the PV mounting frames fixes directly into