• Melker

Melker, Västerås, Sweden

The modernisation of the Sweden's first "glass building" was made with a cost-effective combination of reuse and the latest technology.

The weather station steers the displacement of the temperature curve by measuring the solar irradiance, W/m², which varies considerably over a year. Using these values, the temperature is lowered well in time before it gets too hot," explains Jerry Johansson, Service Manager at Caverion in Sala.

Melker, Västerås, Sweden

Upon its completion in 1960, the Melker office building in Västerås became Sweden's first "glass building". With its many groundbreaking technological features, the building came to be a pioneer for office houses in Sweden for many years.

The whole building is made of one-meter modules and a great number of prefabricated components. Only the exterior walls, the supporting pillars and the stairwells are fixed – all inner walls are movable. The offices were built for the former General Swedish Electric Company, whose construction operations were undergoing quick growth at the time.

These operations required considerable drawing by hand, and the width of the house between the corridor and the exterior walls was thus adapted to fit the most modern drawing furniture of the time. The building was also equipped with a drawing elevator, a pneumatic tube transport system, and paternoster elevators (elevator with a system of open compartments where passengers step on and off while the elevator is moving).

Service Areas

  • Technical Maintenance
  • Project Execution

Disciplines

  • Heating & Sanitation
  • Ventilation & Air Conditioning
  • Cooling
  • Automation

Client Segments

  • Real Estate Investors and Developers

Types

  • Office
Challenge

The Melker office building was completed in 1960. The spectacular building made of glass and concrete featured many groundbreaking new technologies.

Before the rebuilding of the climate control, heating, air conditioning and ventilation were steered by three separate systems. Today there is only one overall intelligent system steering all functions. To keep the costs of the modernisation low, many of the old installations were retained and essentially only the "brains" of the facilities were replaced. The new steering system was planned, installed and programmed by Caverion.

"We have among other things updated the installed four gateways that receive the signals from the existing systems, and we have installed a completely new superordinate brain (PLC) that steers the whole facility," explains Jerry Johansson, Service Manager at Caverion in Sala.

Solution

To secure the operations, the superordinate PLC has what is called a redundancy, that is, there are two identical steering computers, which have been placed in different locations in the building. If one computer faces any errors, the other one takes over.

"We have also installed wireless temperature sensors on every floor. Data sent by them displaces the temperature curve, which increases or decreases the temperature accordingly," says Jerry Johansson.

When the sun is shining, the temperature of a building with this much glass rises fast. An advanced weather station has thus been installed on the roof. Besides temperature, humidity and wind speed, it measures also solar irradiance, an important part of climate control in Melker.

"The weather station steers the displacement of the temperature curve by measuring the solar irradiance, W/m², which varies considerably over a year. Using these values, the temperature is lowered well in time before it gets too hot. The weather station affects the temperature curves mainly during spring and fall, when the solar irradiance can be strong despite the low temperatures outside," says Jerry.

The centralized climate control eliminates the risk of heating and air conditioning working against each other. The building is air conditioned by four AC shunts on each floor, which all provide the office spaces and server rooms with comfort and server air conditioning. Any acute alarms relating to the operations are sent by SMS to on-duty and operations personnel.

Spectacular office building was completed in 1960

Combination of reuse and the latest technology