Recuperation and heat pumps – application

29 April 2021 maius

Recuperation and heat pumps – application. Heat pumps are the most developed and the most effective solution for heating, air conditioning and domestic hot water production in residential or commercial buildings. The heat pump allows you to simultaneously work on the collection of heat energy and the production of cold. Thanks to the built-in heat recuperator, it is possible to obtain thermal energy during summer air conditioning of rooms. Recuperation and heat pumps are the perfect duo for hard times of struggle with high efficiency, efficiency and a successful economic balance.

Recuperators – tasks

Until recently, supply and exhaust ventilation with an air recuperator was rarely used, until specialists concluded that such a system was a necessity. The operation of ventilation is based on the principle of recovery. This is the name of the process in which some heat is returned from the extract air. On leaving the room, the warm air partially heats the incoming cold stream in the heat exchanger. Thus, completely used air enters the street and not only fresh, but already heated air enters the room.

Thanks to the invention of a new technology, the moisture that settles on the walls of the heat exchanger on the exhaust air side begins to be absorbed in them and switches to the supply air side, humidifying it. In this way, almost all the moisture from the removed air returns to the room. How is this process possible? Engineers achieved this effect by creating hygroscopic cellulose cassettes.

The use of mechanical ventilation ensures optimal air exchange in the building, recovery and reuse of energy from the exhaust air. These types of air exchange systems work differently from their gravity counterparts. First of all, they are independent of the natural air movement and allow any increase or decrease in the amount of air supplied to the building.

Thanks to this, there is no situation when it is stuffy and unpleasant inside, and if necessary, quick ventilation is possible. The most important element of the ventilation system with heat recovery is the recuperator, which generates air exchange between the internal and external parts, retains all contamination, keeps the inlet air fresh and restores heat from the exhaust air.

Recuperation and heat pumps – air heat pumps with full heat recovery for hot water supply

A heat pump with full heat recovery consists of outdoor and indoor units. The indoor unit includes an inverter compressor, heat exchanger system, hydraulic kits, distribution panel, microprocessor control and all other components of the cooling circuit. They are all housed in an external universal unit with heat exchangers and electric fans.

Placing the heat pump indoor unit indoors has a significant advantage, all the hydraulic circuits are inside the building and there is no need to protect the system from the risk of freezing. There is no need for heating elements to protect the electronic components and there is no need to protect the hydraulic circuit by adding glycol. Thanks to this design of the heat pump, there is no need for additional protection.

To optimize the heat transfer efficiency of the heat pump, each operating mode has been optimized with a check valve on the water side, so that the water flow is always opposite to the refrigerant flow, thus increasing the operating range of the unit. In full heat recovery (recuperation) mode, the heat pump directs all the heat obtained from cooling the rooms to heat the hot water supply (showers, swimming pools, etc.) If the heat is excessive, then some of the unclaimed heat is removed to the outside by the outdoor unit. This mode is especially popular and effective in summer. In general, energy consumption and, accordingly, the payback period of heat recovery heat pumps are halved.

Heat pump recuperator – summary

Recuperation and heat pumps is recovery by an integrated heat pump. The recuperator is designed to provide ventilation with high heat recovery efficiency and comfortable heating and cooling by the air supplied to the room. A heat pump with a recuperator, for example, extracts hot, humid air. kitchen, bathroom and utility room remove dust, moisture and odors from the house at the same time. In addition, the energy from the extract air is used to heat or cool the incoming air.

The system can be equipped with additional heating elements that can be connected to the electric or central heating system. A heat pump with a recuperator provides a comfortable temperature of the inlet air, even on the coldest winter days. First of all, the price of a recuperator depends on the efficiency of the entire ventilation system. A professional designer will be able to develop a competent project that will accurately meet the conditions and requirements, the quality of which will determine not only the performance of the entire system, but also the further costs of its maintenance.