Basic information about heat pumps

16 Dec 2022 By LÍBI ELEKTRO

Their principle

  • Heat pumps take away heat from the surrounding environment and transfer it to a higher temperature level. The obtained heat can then be used for heating and heating domestic hot water or, for example, a swimming pool.
  • The principle of operation of the heat pump is simple. By pressing in the compressor the refrigerant vapors will heat up and this heat is transferred to the heating water in the condenser. This cools and condenses the vapors. The liquid returns to the expansion valve. This is where it gets violent pressure drop. The team evaporation of the liquid will occur and for significant cooling. The obtained vapors have a very low temperature and therefore in the evaporator they heat up the surrounding air and thus gain heat from it.. They are then fed to the compressor and the cycle repeats.
  • For the operation of the heat pump, electrical energy must be supplied to drive the compressor and other components. The amount of this energy depends on the heating factor, in other words the efficiency, i.e. the share of power and input of the heat pump. In practice, the value of the heating factor ranges from 2 to 4. This means that for 3 kW of electricity consumed energy with the compressor, we get 6 to 12 kW of thermal energy. This will save approximately 2/3 of the heating costs.
  • In order to achieve the highest efficiency of the heat pump, it is necessary that all components are optimally adapted to each other. In the case of monoblock heat pumps, this is already ensured in principle by the fact that suitable components are used in production and the refrigerant circuit is not interfered with in any way during installation. A very important component is the expansion valve. All our heat pumps use an electronic expansion valve. This ensures that the correct amount of refrigerant always enters the evaporator depending on the outside temperature. The evaporator options are optimally used and at the same time the overheating of the vapors at the compressor outlet has been reduced. The result is a reduction in the pressure at the compressor outlet and thus an extension of its service life.

Why a heat pump

1. The heat pump is a universal and multifunctional solution

The heat pump above all belongs to the universal solution where you don't have to limit yourself with regard to the type of building. Whether you have a first-republic villa, a family house, an apartment building or a low-energy building, there is always a suitable heat pump with the required output that can heat or cool the house as needed, and also always ensure hot water in the bathroom.

2. State-subsidized ecological method of heating

However, nothing is free, so of course the important question is how much will it cost? Heat pump systems are generally among the more expensive in terms of acquisition costs. However, these are highly energy-efficient solutions that have a minimal ecological burden on the environment, and they are also very inexpensive to operate. Thanks to this combination, it is one of the state-supported heating sources, and various subsidy programs can be used to purchase a heat pump system (e.g. Green Savings, boiler subsidy, etc.). "In the Czech Republic, air/water heat pumps are the most used for heating due to their ideal performance/price ratio. Water/water and ground/water systems are used to a limited extent due to the need to dig a well or lay an underground collector, which logically increases the procurement"

3. Low operating costs

Low operating costs are of course based on the heat pump principle, where the outdoor unit takes energy from the surrounding air and transfers it to the house via a hydraulic module. Achieving savings is based on the fact that the heat pump, which is driven by electricity, can extract energy from the outdoor environment in x times the supplied electricity. How efficient the heat pump is in this respect is indicated by the so-called COP. "This efficiency is calculated based on the output of the unit divided by the input. COP 3 therefore means that the system produces 3 times more heat than the amount of electricity required to operate it - i.e. for 1 kW of electricity, the pump supplies 3 kW,” depending on the ambient temperature.

NORDline heat pumps

NODRline heat pumps have been on the Czech market for 15 years and already serve thousands of users without any problems.

There are currently 2 basic types of air-water monobloc pumps on offer

1- NB – inventory heat pumps

What exactly is this frequency controlled compressor technology?
It is called inverter because the compressor is controlled and powered by an inverter, which is actually a frequency converter that controls the speed of the compressor and thus the power of the compressor. Inverter = frequency converter. Using control based on frequency converter the heat pump makes it possible smooth regulation heating/cooling performance.

VERY simply, one could say that the faucet detects, thanks to several sensors, that you have an open window and are filling a hot bath. First, it switches on to minimum power, checks whether everything is in order in its heating circuit and increases the power so that you have enough heat and hot water. But it knows when to reduce its performance again so that you maintain your thermal comfort but at the same time save energy.

Inventor pumps can save up to 30% of consumed energy compared to ON / OFF pumps

Their advantage is the possibility of remote access, when it is possible to remotely diagnose any problem and change the settings for a more efficient function of the heat pump.

2- WWBA – heat pumps ON / OFF

Traditional compressor technology is based on a start and stop system - ON / OFF. This means that the heat pump works either at full power (100%) or not at all (0%).
We can compare it with the function of a classic refrigerator or light. This is either on or off and a conventional compressor heat pump without a frequency converter switches between these modes. In practice, this means that the heat pump must switch on its full output

These pumps are cheaper to purchase and have cheaper service costs.

Oda types of heat pumps are registered in subsidy programs