Thermal Design of Ammonia Desuperheater-Condenser and Comparative Study with HTRI

Condensers are widely used in chemical industry, refrigeration, air-conditioning and power generation systems. In this paper, the thermal design of a desuperheater-condenser has been carried out manually as well as using HTRI software. The paper provides information about the types and classification of condensers. The primary objective of this study is to design a desuperheater-condenser for Ammonia-Water system. Ammonia-Water system is widely used in the refrigeration industry. The manual calculations are based on standard co-relations available in various literatures. The results have been compared with HTRI. After comparative analysis the reasons for variation have been identified, critically reviewed and discussed. It has been observed that manual calculations often become lengthy and iterative. HTRI has a rigorous and integral approach which gives more accurate results as well. HTRI is the most widely used software in the industry. But it is also important to verify the results with manual calculations. Likewise, manual design should also be verified with industrial software like HTRI. It may happen sometimes that due to human error, manual design results may come out to be somewhat inaccurate. So in order to have a good and optimized design, manual and software based calculations should be carried out simultaneously and verified with each other.