NorRayVac connuous radiant tube heang from Nortek Global HVAC, under the Reznor brand, was the perfect soluon for Network Rail’s train depot at Hull Botanical Gardens.
INSTALLATION NEWS SPONSORED BY Case study: NorRayVac radiant tube heang for Network Rail depot
Hull Botanical Gardens LMD is a fuelling point that carries out train ‘A’ examinations overnight. The depot is staffed by six level five fitters and three maintenance assistants, along with six cleaners based at the depot, with the night shift being the busiest and coldest.
As the majority of the work is carried out overnight and large doorways remain open for long periods, operatives were working in single figure temperatures, particularly in the winter.
With the rail shed being unheated and the busiest shift at night, a new heating system was paramount to Network Rail. Comfortable working temperatures and greater control over energy management prompted an investment in Nor-Ray-Vac continuous radiant tube heating from Nortek Global HVAC, under the Reznor brand. The depot at Hull Botanical Gardens is 99x16m and has two train tracks running the length of the shed, with roof heights of 7m and 11m. It now benefits from the Nor-Ray- Vac system of 19 burners with ducted fresh air supply due to the diesel fumes from the engines, arranged in six temperature zones with just four discharge fans, to give the client economic flexibility of working.
Suspended from the roof, the heaters emit infra-red rays that warm only objects and people in their path. They do not waste fuel heating the volume of air in the building. This ensures that heating costs are kept to a minimum. The entrance and exit doors often occupy the full width of rail shed buildings and may be left open for many hours a day. When doors are open at both ends, a wind tunnel effect is created and cold air at high velocity is drawn into the shed. The problem of keeping the shed warm enough for personnel to work comfortably is compounded by the north-south alignment of the tracks, which is a severe problem at night when temperatures drop. The Nor-Ray-Vac system provides even heat coverage throughout the building, with rapid warm up time and low noise operation.
Economy and effectiveness are the key criteria when selecting a heating system for rail maintenance sheds. Finding a solution to both in a single heating system can be challenging. However, Nor-Ray-Vac radiant tube heating is ideally suited to this cold and often inhospitable working environment.
Low operating costs are achieved by concentrating the heat at low level, where it is most needed, without heating the volume of air in the building. Rapid response times reduce running costs further. Such flexibility means that warmth is felt by people in the building within minutes of
start-up and fuel is not wasted bringing the air to a comfortable temperature. Since the Reznor radiant system burns fuel at point of use, there are no distribution losses. Emeg successfully removed the redundant system and installed the Reznor Nor-Ray-Vac system producing a comfortable environment for operatives, especially those on the night shift.
uNetwork Link invested in a Nor-Ray-Vac continuous radiant tube heating system uNight shifts and large open doors demanded efficient heating systems uThe heaters, suspended from the roof, emit infra-red rays that warm only objects and people in their path
uLow operating costs are achieved by concentrating the heat at low level
uArea: 99 x 16m (2 rail track shed) uHeight: 7m and 11m uVolume: 14,500 cu m uHeaters: 19 NRV burners
Seven Priva UK BMS control panels are now overseeing heang and venlaon for 120 rooms at a secure children’s home in Nonghamshire.
Priva UK BMS brings comfort and savings to children’s home
After looking to replace a pair of air-handling units that were found to be inefficient in energy usage and individual room control, a secure children’s home in Nottinghamshire is benefiting from the latest building management system (BMS) technology from Priva UK. As part of a five-phase BMS project managed by Heatherose, seven Priva BMS control panels have introduced high levels of climate control and energy efficiency, while maintenance savings are also anticipated.
As the building is owned by the county council, energy efficiency is a priority. The lack of individual room control and general inefficiency in the previous system, prompted Clayfields House to seek a more comprehensive BMS offering better control, easier access for staff, energy-saving potential and the ability to control and monitor the entire site from one location.
“The site was being extended to accommodate more occupants, and existing buildings were being refurbished due to their poor state and the fact that
equipment was failing on a daily basis,” explains Chris Burton, Control Systems Manager at Heatherose. As the building is occupied around the clock, the works had to be completed with minimal disruption. Here, the use of Priva BMS technology proved useful, as the system could be commissioned without the need for Heatherose to be on site.
“There are seven BMS control panels situated around the facility, communicating on a site-wide network,” says Mr Burton. “Touch screens are fitted at locations convenient for staff, allowing them to inspect the system locally. The BMS has site-wide control over all heating, cooling, ventilation, hot water, room window blinds, automated roof lights, storm pumps, foul water pumps and metering. As a result, staff can monitor the BMS data and make changes to all the associated equipment from a single system, including preventive maintenance.”
Eco strategies play key role in regeneraon
uGilberts’ BMS controlled actuated dampers have been fied within the façade of the new £mulmillion Central Library & Archives in Halifax.
Calderdale Council’s BREEAM ‘Excellent’ building utilises sustainable strategies to reduce its carbon footprint and thanks to engineering innovation from Blackpool-based Gilberts, the edifice is self- ventilating. This is achieved by using BMS controlled actuated dampers within the facade and at roof level. Gilberts’ Technical Director, Roy Jones, said: “We needed to design solutions that would discreetly blend with the architecture, yet ensure adequate fresh air inside for people using the building, adequate removal of moisture to protect the contents as well as expel all the excess heat from the IT suites.”
As the solution, 65 Mistrale 75 glazed natural ventilation units fitted with acoustic attenuation, and LTHW heat coils to warm incoming air, have been built into the façade, drawing fresh air into the library. With the main atrium acting as a passive stack, the warm, used air is drawn through and vented through the roof, via eight purpose-designed and constructed
36 BUILDING SERVICES & ENVIRONMENTAL ENGINEER JUNE 2018
penthouse roof terminals. The seven main penthouse terminals also incorporate Gilberts’ Mistrale 75 natural ventilation control dampers to insulate and further optimise extraction. A further giant T shaped penthouse terminal was designed to cover three separate shafts in one unit.
Gilberts’ Mistrale ventilation dampers – used in the façade and most of the roof penthouses* – deliver the best combined performance for U-values and air leakage of its type, surpassing current and medium- term future regulatory requirements. They are proven to deliver a smooth stable and accurate airflow. GRAHAM Construction also commissioned Gilberts to design and fabricate louvre screening to protect and visually hide the roof level plant equipment. *The roof penthouses use a combination of Mistrale VN75 and VN100 damper cassettes. For product information, visit:
VISIT OUR WEBSITE: www.bsee.co.uk
uNetwork Rail’s depot at Hull Botanical Gardens now has an ecient heang system, with low operang costs, thanks to NorRayVac connuous radiant tube heang.
uThe new Priva UK BMS oers beer control, easier access for sta, energysaving potenal and the ability to control and monitor the enre site from one locaon.
‘Northern Powerhouse’ is being given a whole new meaning with the opening of Calderdale’s new £mulmillion Central Library & Archives in Halifax.
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