Översyn av uppvärmning

Sammanfattning

The heating of companies premises is today functional with electrical heating and heating of

fossil fuel. The energy cost for these kinds of heating in buildings has heavily increased during

the last years and the influence on the environment has become more visual. This leads to that

enterprises today become more anxious to render energy more effective and find alternative

solutions to their ancient heating systems. This is something that Skandinaviska kraftprodukter

AB in Halmstad has become aware of.

The purpose with this examination is to find the most cost-efficient and environmental measures

for the office and workshop premises of SKP AB. Where one of the bigger things is to find a

good alternative for their current oil furnace, which was heating the workshop. Another big thing

was to take forward suggestions for measures of rendering energy more effective for the

buildings. By taking contact with people in the business and by inspecting the premises and the

heating system, we got an idea about the measures that could be of current interest. We analysed

these measures to see if they could last financially and environmentally. At the financial analysis

we used LCC-method which means that you calculate the cost of the investment during its life.

With the heating system this means, among other things, running, maintenance and initial costs.

To examine the affect on the environment from the different heating alternatives we chose to

make a easier LCA, which we based on the local conditions.

In an existing building it is the simple measures of rendering energy that dominates financially,

the bigger investments don’t create financial expectations high enough with the energy prices of

today. In the workshop it was foremost a number of industrial gates that led to great heating

losses, which would best be taken care off by PVC-stripes curtain or automatic shutoff of the

heating system when the gates are open. Another alternative would be to invest in aircurtain. This

would reduce the heating losses a lot, but because of the large investment cost is this not an

option. The most cost-efficient measure is to increase the awareness of the employees, about how

their behaviour is affecting the use of energy and to make sure that heat and ventilation doesn’t

run unnecessarily.

While going through possible heating alternatives for the workshop, three alternatives seemed the

most interesting, air-to-air heat pump district heating and pellets. When it came to the financial

aspects where there no great difference between the three alternatives, when you looked at a

calculation period over 30 years. Environmentally heat pump was the best choice because the

electricity of HEM is water produced. The district heating had the highest affect on the

environment because it partially comes from waste burning, which leads to large emissions. From

comfort and maintenance point of view we think that the district heating is the best alternative for

the enterprise, foremost because you don’t have to maintain the system and it can heat the

premises even during the coldest days. The downside with pellets is that it brings a curtain

amount of maintenance and that pellets storage takes a lot of place. The downside of heat pump is

that it doesn’t have enough effect to cope with the coldest days.

Our recommendation of heating system is district heating. It is true it has the biggest influence on

the environment but because it can handle the need for heat during all parts of the year and that it

is free of maintenance ways up for its influence on the environment.