Forced Circulation Solar Water Heating Research Articles

Modelling and analysis of the dynamic behavior of a forced circulation solar water heating system with storage tanks in series

A generalized model for a forced circulation solar water heating system with storage tanks in series is presented in which the loss of heat through an insulation lagging is considered, and the periodic time variation of the intensity of solar radiation, as well as both the ambient air temperature and the temperature of cold water entering the first main tank, is taken into account. Using the Laplace transformation, an exact solution is presented which, under certain conditions, reduces to an approximate solution. The conditions for convergence to the approximate solution are discussed, and figures are presented comparing it with the exact solution for several different sets of conditions. In this communication, the effect of the number of storage tanks on the outlet temperature of the hot water and the effect of various water heating system parameters on its performance have been analytically investigated. Numerical calculations have been made for a typical cold day.

Transient analysis of parallel plate forced circulation solar water heating system

In this paper, a transient analysis of a forced circulation solar water heating system with and without heat exchangers in the collector loop and storage tank has been presented for a parallel flat plate collector. The effect of various water heating system parameters on its performance have been studied. Numerical calculations have been made for a typical cold day viz. 26 January 1980 in Delhi.

Transient analysis of forced circulation solar water heating system with collectors in series

This communication presents an analysis of the thermal performance of a hot water system consisting of N collectors in series with a storage tank; forced circulation and withdrawal of hot water by displacement with cold water are built into the thermal model. Two modes of withdrawal of hot water, viz. (i) constant flow rate and, (ii) constant hot water temperature (during the day), have been considered. For a quantitative appreciation of the results, numerical calculations have been made for the two modes of hot water withdrawal corresponding to a typical cold day (26 January, 1980) in Delhi.

Performance ofn forced circulation water heating systems in series

This paper presents an analytical investigation of the thermal performance of a forced circulation solar water heating system in which n water heating systems are connected in series. Numerical calculations have been made for a typical cold day (26 January 1980) in Delhi, India, and some interesting conclusions have been presented.

Transient analysis of forced circulation solar water heating system

This paper presents a transient analysis of a solar water heating system with forced circulation. Two modes of hot water retrieval have been taken into account viz direct from the tank and through a heat exchanger placed in the tank. Analysis has been presented both for constant flow and constant collection temperature modes. Effects of heat exchanger length and time of starting hot water retrieval on the system performance have also been studied. Numerical calculations have been made for a typical cold day (26 January, 1980) at Delhi.

Transient analysis of closed loop solar water heating system

This paper presents a simplified transient analysis of a forced-circulation solar water heating system with a heat exchanger in the collector loop. Besides two modes of hot water withdrawal viz constant flow and constant collection temperature; the paper also studies the effectiveness of the flow through the heat exchanger and its length. The system performance has been further studied by considering different timings of starting hot water withdrawal. Calculations have been made for a typical cold day (26 January 1980) in New Delhi.