Electric cars, photovoltaics, heat pumps – these are topics that, in the broadly understood utility of consciousness, operate on a daily basis. Everyone has an opinion on them, including breakfast TV presenters and politicians. On two topics I will not stand out, but on heat pumps that I have the right and competence. Fortunately, one principle of physics that requires cutting short the polemic.
Heat pumps (PC) are actually a very good source of inexpensive heat and are mainly used in the context of underfloor heating, most often in small houses. However, it is a solution with great potential on a much larger scale – on the scale of district heating networks. We are talking about PC with a capacity of 1 or 2, or even 15 MW. What technology should be used is not entirely determined by personal preferences.
The list of issues defining technology is extremely short, because it contains two questions.
Question 1: What are the characteristics of the lower and upper heat sources?
For relatively low upstream temperatures (say below 75°C) we can consider all three of the most popular technologies: F-gas, R744 and NH3. For higher temperatures, we are talking rather only about R744 and NH3, with the note that CO2 – to be profitable – will require low return temperatures, below 25 ° C.
Question 2: What is the required power?
F-gases are great at low to medium power. In my career, I encountered one reasonable, small (5kW), to medium-sized – around 2 or 3 MW. Devices that will actually support urban networks will usually be only ammonia.
PCs offered by MAN break out with a big bang from the above. The manufacturer provides extraordinary advanced CO2 devices that can operate at high return temperatures, can give heat at temperatures up to 150°C and exist in powers up to 80MW! you don’t believe? Type in the search engine.
It’s good when the refrigeration works – we can provide that and it doesn’t use a lot of energy unnecessarily – we’re really good at that. It’s probably not modest. Refrigeration is important to us. We believe… we know that a well-designed and executed cooling system in the plastics processing industry can make all the […]
Electric cars, photovoltaics, heat pumps – these are topics that, in the broadly understood utility of consciousness, operate on a daily basis. Everyone has an opinion on them, including breakfast TV presenters and politicians. On two topics I will not stand out, but on heat pumps that I have the right and competence. Fortunately, one […]
A sailing ship needs wind to move towards its destination. The stronger it is, the faster the boat moves forward. However, when the wind is too strong, it jerks the sails and raises waves that can sink an entire ship. The situation of companies in our industry is similar. He laughs himself at how […]