In this paper the changes in the heat capacity of cooling towers has been investigated as a result of injecting combustion products of boilers. In the tower, the air is re-heated through mixing with hot flue gas after passing through the heat exchangers. As a result of this process, the draft of the cooling tower is increased. The additional produced draft depends on the ambient temperature and...

In this paper the changes in the heat capacity of cooling towers has been investigated as a result of injecting combustion products of boilers. In the tower, the air is re-heated through mixing with hot flue gas after passing through the heat exchangers. As a result of this process, the draft of the cooling tower is increased. The additional produced draft depends on the ambient temperature and...

In this paper solar assisted heating and absorption cooling system and domestic hot water needs for a hotel having fifty rooms in Antalya have been investigated. First of all, solar radiation and meteorological data for Antalya and heating and cooling loads of the hotel building are given. For the heating cycle, active systems using liquid as the working fluid; and for the cooling cycle, solar-...

The use of phase-changing materials (PCMs) is a practical and powerful way buffering thermal fluctuations maintaining the isothermal nature storage process. In this study, melamine formaldehyde microcapsules with paraffin cores were used as PCMs; pullulan films PCMs prepared by film-casting method; composite analysed regard to their chemical structure, properties, stability, recyclability. Unif...

Although the numerous advantages of polymer optical fibers have been exploited in the fields of sensors and telecommunications, such fibers still experience a critical problem: the temperature dependency. Therefore, we explored the temperature-independent operation of a polymer fiber-optic evanescent wave sensor immersed in distilled water. We investigated variations in the surface morphology, ...

Abstract Phase change material (PCM) experiencing supercooling and phase hysteresis are widely reported in the literature. However, only few studies model analytically such PCM, they mostly focus on either or hysteresis, but rarely both phenomena. Moreover, partial cycles, with an incomplete melting solidification, considered even if these processes occur frequently latent heat thermal energy s...

In the present study, thermo-economic analysis of a combined solid oxide fuel cell (SOFC) with a gas turbine, a generator-absorber heat exchanger (GAX) and heating process heat exchanger for heating, cooling and power production as a tri-generation system is conducted. Also, an external steam reformer is applied to convert methanol as oxygenated fuel to hydrogen for the electrochemical process ...

Courtyard geometry plays an important role in the amount of received solar radiation, also heating and cooling energy consumption of buildings. Considering this geometry for finding its proper proportion and orientation is significant to increase indoor thermal comfort, and as a result reduce the amount of energy consumption. This paper mainly focuses on a dormitory courtyard in Yazd and invest...

In this paper, dynamic transient method and conventional degree-hours method (static) have been compared to estimate heating and cooling loads of building’s wall. All main wall surfaces of various orientations, i.e.South, West, East, North, and horizontal are considered in the climate of Tehran, Iran. In this study, a conventional wall structure, which is comprisedconcrete as main wall material...