Hi,

I imagine at 200 C ther are a lot of scope for energy recovery. The easiest is for space heating. With a little more investment, air conditioning is possible - using heat pump method. I had recently reviewed a paper on using waste heat in ships for ballast water heating to neutralise foreign/migrating species in the ballst water. 

Wan Zaidi

Thank you, Wan.

The main goal  is to convert the residual heat în electricity,  that is subsidiesed with Green Certificates.  

Dear sir

Some examples attached..

Dear sir 

Your answer is precious for me.  

Thanks!

Gabriel 

Dear Gabriel,

The range of the flue gases temperature you mentioned is very appropriate to generate electricity using ORC technology. Here are some article using low-grade WHR as a heat source of ORCs. The first article contains a list of installed ORC plants around the world powered by WHR. 

B. F. Tchanche et al. "Low-grade heat conversion into power using organic Rankine cycles – A review of various applications," Renewable and Sustainable Energy Reviews, vol. 15, pp. 3963-3979, 10// 2011.

U. Muhammad et al. "Design and experimental investigation of a 1kW organic Rankine cycle system using R245fa as working fluid for low-grade waste heat recovery from steam," Energy Conversion and Management, vol. 103, pp. 1089-1100, 2015.

N. Zhou et al. "Experimental study on Organic Rankine Cycle for waste heat recovery from low-temperature flue gas," Energy, vol. 55, pp. 216-225, 2013.

F. Cataldo et al. "Fluid selection of Organic Rankine Cycle for low-temperature waste heat recovery based on thermal optimization," Energy, vol. 72, pp. 159-167, 8/1/ 2014.

Also, the followings are website for some companies providing ORC systems operating with low-grade waste heat:

http://www.infinityturbine.com/it10.html 

http://www.enogia.com/product.html

http://www.eneftech.com/en/waste_heat_recovery.php

http://www.vdg.no/index.php?menuid=16

Regards

Thanks to all for their contribution to my knowledge.. Regards