Air conditioning: What is the royal way

2017-07-06 14:28:39

Between sitting in the dark and sitting in a glass house, there is still something in between.

This reminds me of an anecdote told by an acquaintance who was traveling in Texas on behalf of McKinsey. Scorching heat outside, in the client’s company headquarters it was ice-cold air-conditioned, and in the conference room of the executive floor the large fireplace was then lit.
It’s all possible, but it deprives the participants of any intelligence.

We are planning with geothermal energy, where passive cooling is an option. I hope to set the cold lakes on the ground, which are supposedly occurring, in motion through controlled residential ventilation. Otherwise, of course shading and masonry (sand-lime brick with mineral wool – more mass is hardly possible), which keeps the heat away for a long time. I also consider this the right approach: keeping cold/heat inside, instead of actively heating/cooling against it.

2017-07-10 19:59:55

Exactly, a compact device with an integrated hot water tank. I wanted to keep the system as simple as possible on purpose; I installed neither a buffer tank nor mixers, and no ERR either. However, preparations for these are located in the rooms and distributors. The heat pump cost €8,000 plus installation, the deep drilling including all pipes, shaft, and expert cost €13,000. Unfortunately, these are/were very expensive in our area. The running costs consist only of consumption, which in recent years has been between 3,100 and 3,500 kWh for 185 sqm heated living space including hot water. We also have a small photovoltaic system on the roof that covers part of the consumption.

The controlled residential ventilation has its own brine ground heat exchanger, consisting of a 100-meter brine line laid around the house during the basement embankment, a pump, and a heat exchanger. Purchase cost approx. €2,000 Consumption of ground heat exchanger: 242 kWh per year Consumption of controlled residential ventilation: 570 kWh The supply air temperature at 30°C outside temperature is approx. 20°C.

If a heat pump is planned anyway, you can test without a large financial risk; if the cooling capacity is not sufficient, you can always retrofit an air conditioning unit.

Interesting. I could imagine it like that as well. Possibly instead of the probe with solar collectors or groundwater if the soil conditions allow it.

Have you made a comparative calculation? How much electricity and heating costs do you save per year? What are the actual annual costs? And then compared to the initial investment?

2017-07-10 20:03:56

I would simply choose the method for which the installer also guarantees, even at 40 degrees room temperature and 40 degrees outside temperature, that the room cools down to a comfortable 22 degrees within an hour.

That also seems a bit oversized to me. You just shouldn't let it get that hot inside in the first place, so turn on the air conditioning in time when the first hot days come. Then you don’t have to cool down from a hot 40 degrees by almost 20 degrees.

2017-07-26 18:51:30

To get back to the topic: We want a multi split with 2 indoor units. That will cost us about 3k to 3.5k €, with Mitsubishi devices. I'm fed up with lack of sleep in summer...

2017-07-28 10:14:07

If it doesn't have to be Mitsubishi, then it can be done much cheaper...

I'm fed up with lack of sleep in the summer...

I totally agree with you...

Air conditioning: What is the royal way

Alex85

Hausbauer1

Hausbauer1

matte

Mycraft