DE102005028088A1 - Cooling system for power generating module especially for domestic application has air cooling circuit linked to underfloor heating - Google Patents

Abstract

A cooling system for a power generating module, especially for domestic applications, has the engine and generator mounted in an enclosed housing (5) and with forced air flow providing a warm air supply for an underfloor heating system (12 to 14) and with the hot exhaust gasses linked to a heat exchanger for a hot water supply, e.g. for a shower. The system dispenses with costly water cooling for the engine and generator. The warm air duct is provided with thermal and acoustic cladding.

Description

The Invention relates to the heat exchange for the most part smaller combined heat and power plants equipped with a generator whose internal combustion engine is air-cooled and not water-cooled.

Of the heat exchange should the waste heat the internal combustion engine for heating and hot water supply e.g. allow a single family home.

at water-cooled Combined heat and power plants heated the cooling water of the internal combustion engine via a heat exchangers the hot water tank and in addition is mostly over an exhaust gas heat exchanger the remaining waste heat for the Heating circuit exploited.

Now is available on the market (especially for generators up to 20 kW) very reasonably priced Offers of air-cooled Power generators. These have the more complex and therefore more expensive water cooling of the Drive motor saved.

Of the specified in claim 1 invention, the object is based an equivalent heat exchange as with the water-cooled combined heat and power plants with cooling water and exhaust gas heat exchanger to achieve, since exhaust gas heat exchanger and water cooling considerably more complex procedures for the principle combined heat and power plant are.

This Problem is solved by the features listed in claim 1 solved.

The particular advantages of the invention are that in the present heat exchange the usual ones Cooling water- and exhaust gas heat exchanger can fall away, instead an air tube with integrated fan and a heated air floor heating be used, which is not so expensive to manufacture and Price is as usual solution (State of the art).

One embodiment The invention is illustrated in the drawing 1 and will be described in more detail below.

It demonstrate:

1 internal combustion engine

2 power generator

3 Fresh air supply with filter

4 Exhaust pipe from the combustion engine

5 Sound and heat insulated container

6 Hot water storage

7 Copper pipe winding of the exhaust pipe for heat transfer to the hot water circuit

8th Shower and others

9 Cold water supply

10 Muffler for exhaust air from the container ( 5 )

11 Exhaust pipe from the container ( 5 )

12 Screed boards (substructure for floor)

13 Intermediate spaces in which the waste heat from the container ( 5 ) flows

14 floor

15 Ventilation unit with fan

16 Air inlet with integrated silencer

17 Air outflow opening into the basement

The object of the invention, as can be seen from drawing 1, achieved in that the power generator ( 1 . 2 ) into a sufficiently large sound and heat-insulated container ( 5 ) is made of sheet metal or stone.

The internal combustion engine ( 1 ) is supplied from the outside with fresh air through an air filter ( 3 ) provided.

A soft copper tube ( 7 ), about 6 mm in diameter, is wound around the exhaust pipe of the internal combustion engine, thereby heat exchange takes place from the exhaust pipe to the copper pipe. The otherwise thermally insulated copper pipe ( 7 ) conducts the heat into the hot water tank ( 6 ) with cold water inlet ( 9 ), which in turn supplies showers, baths, etc. ( 8th ).

Through a second air tube ( 10 ) with a diameter of about 30cm, the remaining waste heat in the container ( 5 ) by a ventilation device with fan ( 15 ) in a floor heating in Wohnbe rich ( 12 . 13 . 14 ). The air openings 16 . 17 provide the necessary return of the air. The silencer ( 10 ) made of stacked metal plates with spacers ensures the insulation of the sound.

The underfloor heating is simply placed on existing floor coverings so that screed boards ( 12 ) with spaces ( 13 ) and then a layer of insulation boards without or with laminate / linoleum / tiles / parquet is laid.

Through the spaces ( 13 ) is by means of the air pipe connection ( 11 ) the warm air from the container ( 5 ) and heated so the floor, whereby the erfindungsmäßig wanted heat exchange comes about.

An air outlet opening ( 17 ) from the floor heating ( 12 . 13 . 14 ) lets the cooled air flow back into the basement, where it flows through the air inlet ( 16 ) in the container ( 5 ) is sucked in.

Claims (1)

Process for heat exchange for air-cooled cogeneration plants, characterized in that 1st waste heat of the drive motor is passed directly, without a heat exchanger, in a hot air floor heating by means of a soundproof pipe of appropriate size. 2. The container in which the generator is, including a Lufteinströmöffnung and an air outlet opening with vent fan has. By the latter, the forming in the container during operation of the generator warm air is forced into the hot air floor heating, whereby the desired heat exchange takes place. 3. The exhaust gas heat exchanger used is not so effective compared to the prior art, but is designed less expensive and meets the requirements, since "lost" waste heat is absorbed by the waste heat to the floor heating system again.