Case Study - Factory Ventilation
Peter Grant Papers
When Peter Grant Papers at Lancaster had a problem with condensation control which was compromising product quality and employee health and safety, they called
JJ Ventilation for assistance.
Problem
Peter Grant Papers manufacture tissue paper from pulp. The pulp is formed into paper from one end of the production line (wet end) and the finished product is wound onto rolls at the opposite end of the production line and mill building (dry end). The wet end of the factory generates very hot and humid conditions which migrate down the building to the cooler dry end of the production line. As the hot, humid air comes into contact with the cooler surfaces of the dry end, condensation forms and water droplets fall onto the floor and finished product.
Solution
To improve the environment within the mill, it was necessary to remove more of the hot, humid air from the wet end as well as providing a balanced flow of tempered make-up air into the area. This was done by increasing the performance of an existing steam extraction canopy in order to capture higher volumes of steam at source. Additional roof extraction equipment was also installed above the wet end of the mill to remove further volumes of overspill steam and high level humidity. This air was balanced with the installation of a Combat gas heater which supplied tempered air flow back into the dry end of the factory to help prevent condensation forming on the roof skin by increasing the dew point of the building fabric.
Upon completion and commissioning, the system was an immediate success. The dry end is now virtually free from condensation, with water no longer dripping from the roof structure and finished products.
Testimonial
JJ Ventilation were invited onto site where they conducted a free site survey and prepared a report outlining their proposed schemes. A further site meeting was organised where their schemes were discussed in full.
The order was placed. At all stages prior to the installation, design drawings and specifications were sent to us as we requested, every minor detail was attended to efficiently.
The installation needed to coincide with our production shutdown window (two days). The installation engineers completed their work both to a high standard and on time, nothing was too much trouble for the installation crew as they often had to alter their programme to suit our needs at the time.
At the time of writing, the system installed has definitely improved our working environment.
JJ Ventilation have throughout the project performed in a very professional manner. I would have no hesitation in using them in the future.
Paul Thistlethwaite,
Chief Engineer
Turner Powertrain Systems
Turner Powertrain Systems is the world market leader in the design, development and manufacture of off-highway transmissions for Backhoe Loaders, Telescopic Material Handlers and Site Dumpers.
Problem
The main building on site comprises a large assembly area and adjacent machine shop. The building suffered from high temperatures and poor air circulation during the summer months.
Even with the existing roof extract fans operating, all doors open and heating plant on full fresh air, conditions remained hot and oppressive. Many workstations were in any case some distance from the available doors or obstructed by plant and processes.
More effective factory ventilation and air flows were needed. An important issue was that the doors should remain closed when not in use both for reasons of security and to improve cleanliness for sensitive assembly operations.
Solution
To meet the project requirements, a modular system of ten JJ Roof Inblo Units was installed in the building; five in the assembly area and five in the machine shop.
Constructed in lightweight aluminium sections, the Inblo Units were sited in strategic areas and ‘hotspots’ to deliver cooling supplies of fresh air to working level independent of open doors. Individual unit make-up includes roof cowl assembly, recirculation dampers, fan and adjustable air projector.
All units in the assembly area are fitted with filters to clean the air stream. Mixed-flow fans, with high-efficiency (EFF1) motors, were selected for these particular units to maintain high air flows.
