LT2008083A - Air ventilation and conditioning system having a function of electric power generation - Google Patents

Abstract

The goal of the invention - hybrid ventilation and conditioning system, especially intended to be used for high-rise buildings, with an electric energy generation feature. Ventilation and conditioning in the system are accomplished by utilizing cooler and cleaner air from the higher atmospheric strata, while the induced draught is used for generation of electric energy. The draught in the system is ensured by installing the system according to one or several following criteria: the air circulation channel is made as tight as possible, the elevation difference of the tops of air channels (1,2) is made as big as possible, and the air is warmed as much as possible while circulating in the system.

Description

AIR VENTILATION AND AIR CONDITIONING SYSTEM WITH ELECTRICAL ENERGY GENERATION FUNCTION

FIELD OF THE INVENTION The present invention relates to indoor ventilation and air conditioning systems, in particular ventilation and air conditioning systems for high-rise buildings. The present invention also relates to methods of generating electricity using airflows.

TECHNICAL LEVEL

The ventilation of the premises is usually realized by using the air outside the building, which is fed into the premises, and the exhaled air, which is warmer than the supplied, is automatically and exerted by the pull and is pulled outwards, usually through the exhaust ducts on the roof of the building.

There are also hybrid systems called "fresh air conditioning" where the outside air from the building is fed directly into the room and, if necessary, passes through the heat exchanger heat exchanger that is additionally cooled and dehumidified.

There is a known Korean patent no. KR20050005337, published 2005. January 13 This patent describes a hybrid "fresh air conditioning" system operating on the principle described above. Such a system works somewhat more economically than the other, separate air conditioning and ventilation systems, as the use of ventilated air is used and there is no need to create the additional air circulation required for conditioning in conventional air conditioning systems. However, in the case of large outdoor heat, the majority of the energy consumption is directly attributable to the heat pump.

Also, an international patent application no. PCT / IB2008 / 052143, which describes a hybrid ventilation and air conditioning system consisting of at least two substantially vertical ducts, one for supplying 2 cooler air to premises from cooler atmospheric layers at the top of a very high building, and another for exhalation. and for exhausted air. These two ducts are interconnected through the indoor circulation duct so that the air from the first duct is fed into the rooms to be ventilated and subsequently removed through the second duct. Ideally, these ducts are arranged so that the upper end of the first duct is below the upper end of the second duct, thereby providing natural air circulation throughout the system due to the difference in temperature. The air circulating in the system warms up, exposed to the heat of the human and animal heat, the external blocks of the conditioning equipment (heat exchangers) and other heat sources installed in the buildings. BACKGROUND OF THE INVENTION The present invention aims to improve the hybrid air conditioning and conditioning system described in International Patent Application No. PCT / IB2008 / 052143 so as to also provide an energy generation function using natural air currents generated in the system.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 - Principal scheme of ventilation and air conditioning system

THE BEST IMPLEMENTATION OPTIONS

FIG. Figure 1 illustrates a preferred embodiment of the present invention, a hybrid air ventilation and conditioning system for very high power generation. This system shall include at least: - air supply channel (1), - indoor circulation channel (3); - air exhaust duct (2) and - power generating turbines (8) installed in air ducts (1,2) and ducts (4,5). 3

The air supply and exhaust ducts (1, 2) are essentially vertical and are raised to the top of the building or above in order to pick up cooler atmospheric air above the top of the building. Ideally, the upper end of the exhaust channel (2) is higher than the upper end of the feed channel (1), as the greater the difference, the stronger the natural thrust is created in said ventilation and conditioning system. Typically, said height difference should be such that a constant air circulation occurs throughout the system.

The indoor circulation channel (3) is a duct (4.5), indoor and ventilation duct system that delivers clean, cooler air to the premises and breathes the breath. These ducts (4,5) are interconnected to form the closest possible air circulation circuit, starting at the air supply channel (1) and ending at the air outlet (2). Hence, the premises themselves must be well insulated from the outside of the building, only in such a way as to ensure natural traction and good air circulation throughout the ventilation-conditioning system.

If the air temperature at the top of the building is not low enough for people in the building to feel comfortable, air conditioners with indoor heat exchangers (7), heat pipe (9) and heat pumps (6) can be installed to cool down the supply air. mounted so as to extract heat from the air supply duct (1) during the operating cycle, in other words, to cool the duct and to heat it to the warmer air passing through the exhaust duct (2) and / or to heat the indoor heat exchangers (9) and this heat delivered to the exhaust air in the exhaust duct (2). In this way, the air fed into the air supply channel (1) is cooled to the selected base temperature, for example 24-25 ° C, and the air at such temperature is fed into the circulation channel (3). Indoor heat exchangers (7) can additionally cool the air to the desired temperature. This combined air cooling method ensures efficient air cooling using already cooler high altitude air and allows you to set the temperature for each individual room, individual building floor, and so on. 4

Air velocity or thrust in the system depends on three main factors: - indoor tightness - the tighter the indoor circulation channel (3) in relation to the exterior of the building, the better the air circulation and thrust in the system; - the difference in the height of the upper ends of the air ducts (1,2) - the greater the difference between the upper ends of these ducts (1,2), the greater the temperature difference between the air entering and leaving the system and the better the traction in the system; - Inside the circulating air heating system - the more the air warms up, the stronger the traction in the system.

The power generation function in the system is implemented by the use of turbines (8), which can be installed both in the main vertical air ducts (1,2) and in the smaller ducts of the air ducts (4,5), by which the air is transported to the premises. the main air supply duct (1) or removed from the main air duct (2). The arrangement of the turbines (8), their design is chosen specifically for each building, depending on the configuration and dimensions of the air channel system.

Ideally, the turbines (8) used in the system have impellers whose rotation axis coincides with the imaginary axis of the duct (4,5) or the air channel (1,2) and permanent magnets are fixed at the ends of the wings. This type of wing acts as a generator rotor. The generator windings are located in the pipe walls of the duct (4,5) or air channel (1,2) in the rotor area, leaving as little space as possible between the rotating magnets and the duct (4,5) or air channel (1,2) the pipe walls are fitted with strings.

Claims (5)

5 DEFINITION DEFINITION 1. A room ventilation and conditioning system comprising at least an air supply channel (1), an indoor circulation channel (3), and an air outlet channel (2), in which the air used for room ventilation is taken from cooler atmospheric layers at the top of the building characterized in that the system comprises an electric generating device mounted at least in one of the air ducts (1, 2) and / or the duct (4, 5) which converts the air flow energy into electrical energy. 2. An indoor ventilation and conditioning system according to claim 1, characterized in that the power generating equipment comprises turbines (8). 3. An indoor ventilation and air conditioning system according to claim 2, characterized in that the turbine (8) in the impeller is adapted to act as a generator rotor, and the walls of the air channels (1, 2) in the impeller area are adapted to act as a generator stator. 4. Room ventilation and conditioning system according to any one of the preceding claims, characterized in that the system is adapted to change the supply air temperature to the premises in two stages: - by cooling the air in the air supply channel (1) to a predetermined base temperature; - cooling of the temperature of the base temperature distributed to the premises to the temperature selected in this room as the desired temperature, where the cooling of the air to the base temperature is carried out by heat exchangers of the heat pumps installed in the general air supply duct (1), and cooling to the temperature selected in the room is carried out by heat pump heat exchangers (7) installed in the indoor circulation channel (3). 6 5. An indoor ventilation and conditioning system according to any one of the preceding claims, characterized in that at least one of the following heat sources installed inside the building is used to heat the air entering the exhaust channel (2): - heat pumps (6) used in air conditioners, refrigerators and freezers condenser; - computer and telecommunications equipment; - heating installations such as fuel-fired boilers, industrial heating or heating equipment.