BEYOND Cogeneration and Trigeneration
-- A brief description
-- A YouTube video
Now, why should the heat be rejected from the condenser, in the first place?
The cycle requires that the steam be condensed back into water so that it could be recycled back to the boiler to generate a continuous flow of steam. This can happen only if the heat content of the steam is removed. Way back in Physics, we said that we are removing the latent heat of condensation.
Of course, you really do not have to condense the steam back into water if you have an abundant supply of high quality, mineral-free water. But you will not realize the vacuum that is developed at the condenser. And your efficiency is severely affected adversely.
- Some send the steam to heat exchangers that send hot water to provide space heating for buildings.
- In addition, some send the steam to provide heating to a manufacturing process.
- Many engineers, these days, use the heat from the steam to "heat pumps."
The application of the heat pump that I am talking about uses the WASTE ENERGY as an input to heat pumps. This energy is FREE! All you need to do is put up the investment to recover this energy, and for the heat pumps, and, there you have it!
Wait a minute, you might say. We are paying for the investment. Yes, the investment costs money, but this cost has a PAYBACK, or an Internal Rate of Return (IRR). In time, it pays for itself, and everything from then on is "gravy", not like electricity that is simply an entry in the expense stream of the profit-and-loss statement.
I want to repeat what the author Rajaratnam Shanthini said ". . . for each MW of electric power generation there is at least about 1.5 MW of power is wasted" to the condenser
I spearheaded a project and led a the team that developed a project to use this WASTE energy to drive a system of heat pumps. I have described the concepts that apply, in the succeeding sections.
NOTE: I am still working on this blog. I will be adding more details in the days and weeks to come. In the meantime - - - ENJOY!