Building Management System Case Study

The Buda Castle marks the place where Budapest was founded. As the most prominent building in Hungary’s capital city, it dominates the skyline. Today it is a World Heritage site and the home to a number of museums and art galleries including the Ludwig Museum, the Hungarian National Gallery and the Budapest Natural History Museum.

Castle curators tread a fine line between conserving their country’s heritage and using modern automation control technology to get the best results. How to protect and present the ancient buildings and the priceless collections within them, yet bring the building management and security systems into the 21st century? This was one such dilemma. They wanted to improve energy efficiency, comfort and security, even though it meant renewing mechanical equipment and installation of structured network cabling. They also wanted to cut operating costs.

The Solution

Honeywell's solution spanned the southern part of the Castle complex - the six buildings that form part of the former Royal Palace now functioning as museums, libraries and theatres. The Ludwig Collection, The National Gallery, Budapest Historical Museum, Széchenyi National Library, and Castle Theatre are all housed in this area.

Honeywell faced big, somewhat unusual challenges in delivering the project. As a listed World Heritage site, all works had to be undertaken in accordance with strict regulations. Unusually thick walls, large distances, protected archaeological sites and historical buildings added to the problem. In some cases international specialists were employed.

For example, Austrian drilling technology was used to bore a cable duct into a wall more than 6m thick. At other times, Honeywell used alpine techniques for the cabling works.

In order to preserve the fabric of the buildings yet bring about improved energy efficiency, only those mechanical parts critical to reliable and efficient operation were renewed. This meant pipelines, actuators and heat meters being installed or replaced on-site. To further reduce the operating costs, the operation and maintenance of the heating, ventilation and air conditioning (HVAC) substations were automated to run at low-cost periods.

The Customer Benefit

A spokesperson for Budai Vargondnoksag Kht said, "We didn't find any operational errors during a year-long trial period. During this time we took the opportunity to compare the performance of the Honeywell building management system with competitive offerings. This exercise only served to underline our choice - that we had chosen the right company - the right technology and the right people - for the job."

Castle staff engineers also liked the Honeywell solution which is based on an integrated building management platform. After minimal training from Honeywell they were able to customize the system to their own needs.

Plans are in progress for Honeywell to extend the Castle's security system to include photo identity, access control, time and attendance monitoring and fire & alarm. A maintenance contract has been signed and a separate cooling mechanism has been integrated in to the building management system.

For more information on Honeywell Building Management Systems, visit http://www.honeywell.com/sites/acs/buildingsolutions.htm

Building automation and control systems (BACs) allow plants in buildings to be controlled and managed, thus increasing the users' comfort and reducing the operation and maintenance costs. As far as the lighting services are concerned, control systems offer an important opportunity of managing lighting systems and reducing energy consumption, due to the use of integration strategies between daylight and electric lighting and strategies based on the occupancy of spaces. The results of an experimental case study of ten offices in Torino (Italy), in which a custom-design building automation and control system has been designed to control both the lighting plants and the air conditioning system, are presented in this paper. The study was carried out in order to evaluate the energy efficiency of the lighting control system and to analyse the environmental luminous conditions obtained through the application of this technology to a real case. The environmental and energy performances, together with the degree of users' satisfaction and acceptance of this control system, were analysed after a year of activity to verify the potentiality and operation of this lighting control system. The obtained results regarding the potential energy savings (from 17% to 32%) were evaluated taking into account both the monitored annual electric energy consumption (for operation) and the parasitic energy consumption due to the installed devices (luminaire ballasts, sensors and controllers), and were compared with the estimated energy consumption calculated applying the method proposed in the European standard EN 15193:2007.

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