Micro Cogeneration – Hydronic Type – Natural Gas or Propane

This system uses the fluids, water or water/glycol, as a means of transferring the heat or cold to the area requiring the heating or cooling.

A refrigerant such as R134a or R409a is used in a conventional manner to cool/heat the water or water/glycol.

It can be more efficient and simpler to install a system using fluid circulate in small one inch diameter pipes to move heat or cold in place of using 14 inch diameter air ducts.

The Micro cogeneration hydronic system is comprised of the following subsystems:

· Kawasaki Model 620D Engine converted for Gas operation.

· Automatic oil makeup with 2 quart capacity.

· Model 6200 Alternator – 6 kW at 24 Vdc.

· 34,000 Btu/hr heat pump.

· 30,000 Btu/hr Model 30 exhaust heat exchanger for heating hot water or swimming pools and hot tubs.

· Sound attenuated enclosure producing only 68 dBA at 21 feet (similar noise level as a central air-conditioning condenser).

· Microprocessor based control system regulating battery charging, air and hot water temperatures, and safety functions.

To complete the system requires:

· Propane fuel tank or connection to natural gas line (local propane or Gas Company).

· Hydronic fluid to air heat exchangers (Polar or others) or radiant floor system (provided by others).

· Hydronic water pump, plumbing, reservoir, and valves (local stores such as grangers or home depot).

· Hot water pump (local stores such as grangers or home depot).

· Concrete mounting pad.

· Electrical connections to the battery/inverter system (Polar or others).

· Some systems may require a heat dump heat exchanger on the exhaust hot water system (Polar). Some systems may not make use of all the heat produced by the exhaust heat exchangers, therefore a heat exchanger is required to dump the excess heat.

· Hydronic heating/cooling heat exchangers are bid by requirement. Some systems will incorporate a central heat exchanger and others will use heat exchangers in each room.

Micro Cogeneration – Central Air Type– Natural Gas or Propane.

Instead of using fluid to transport heating and cooling air is used in a fashion identical a unitary (or central) heat pump. Two air ducts move the air to and from the micro cogeneration unit. The exhaust heat exchanger provides a source for hot water.