Mohammad ghaheri - Department of Chemical Engineering, sirjan Branch, Islamic Azad University, sirjan, Iran.
Seyedeh media jadbaba - Department of Chemical Engineering, Tehran North Branch, Islamic Azad University, Tehran, Iran.
Hamed zarenezhad - Department of Chemical Engineering, sirjan Branch, Islamic Azad University, sirjan, Iran.
Sayed mohammadali musavi - Department of Chemical Engineering, sirjan Branch, Islamic Azad University, sirjan, Iran.

Heat transfer in anticipation of the heat transfer between two objects because of the temperature difference arises deals.Nano fluids are a class of heat transfer fluids which are created by dispersing solid nanoparticles in traditional heat transfer fluids. This work describe an empirical design and a numerical method to illustrate the forced convective heat transfer using traditional fluid and Zinc Oxide/Water Nano fluid in double-pipe heat exchanger utilizing commerciallyavailable equipment. The test results are shown that the heat transfer rate and heat transfer coefficients of the Nano fluid is higher than thatof the base liquid (i.e., water). Increasing in the overall heat transfer coefficient is more forcible at high cold flow rate for a given hot fluidflow rate. The heat transfer rate and heat transfer coefficients, finally increase with increase in mass flow rates of hot and cold streams.

Convective heat transfer-Heat exchanger-Nano fluid