heat2power in the power generation market


Power generation costs have strongly increased over the last couple of years due to increasing fuel prices. Though the engines in power generation are already very efficient (43% or around 200 g/kWh) they still have a waste heat power flow that can be exploited to achieve better fuel economy. Modern powerplants already make use of the waste heat in so called Combined Heat and Power (CHP). That means that the heat is used as it is in other processes and applications such as hot water supply in large buildings and residential areas, warm water supply to fish farms or tropical greenhouses, drying processes etc. This use of waste heat is the easiest and usually cheapest way of using waste heat.

waste heat regeneration for power generation
A power generation unit with combustion engine on the right and electric generator on the left :
Well suited for receiving a heat2power unit.

Central power stations do not always or hardly ever make use of waste heat and are therefor using cooling towers or nearby rivers to evacuate the waste heat. Though once considered the normal way of doing, this is of course a very inefficient way of generating electricity. Fortunately we see a significant increase in decentralised power generation that enables effective usage of waste heat and increasing the overall efficiency of power generation. Building traditional central power stations in response to the increasing power demand is thus illogic and should even be avoided.

heat2power proposes decentralized power generation with increased efficiency for even higher percentage of electricity output.

Power generation sets exist in many different sizes and flavours. There are piston engines that run on Diesel, natural gas or even Biodiesel and there are also gas turbines. Many of these devices run around 8000 hours per year and every little bit of efficiency improvement results in substantial financial benefits and less CO2 emissions as well. These generator sets also often run at relatively high load, around 75% of full load at 1500 RPM (1500 RPM easily gets electricity at 50Hz). They have temperatures in the exhaust of around 570-600ºC. Gas turbine exhaust gas normally also has temperatures around 600ºC. The exhaust powerflow at 600ºC can become the source of energy for a heat2power module that is then fitted next to the combustion engine. The heat2power unit would generate additional torque on the crankshaft which translates in higher electrical output. The gains that have been calculated for improved powergen unit are around 11%. heat2power is currently working on the design and implementation of an installation based on a 500 kW diesel engine. Its current monthly fuel consumption is around 60.000 liters. The expected fuel savings then are around 6000 litres per month or more than 70.000 litres per year. The final specific fuel consumption is calculated at 180 g/kWh (electric kWh). This is without taking into consideration the useful use of waste heat of the cooling water at 90ºC.

heat2power now proposes its technology to all companies that make or use power generators.