Modelling of Cooling Tower Splash Pack

A phase change calcium looping thermochemical energy storage system based on CaCO3/CaO-CaCl2

Direct contact air conditioning systems, in which heat and mass are transferred directly between air and water droplets, have many advantages over conventional indirect contact systems. The purpose of this research is to investigate the cooling and heating performances of direct contact air conditioning system for various inlet parameters such as air velocity, air temperature, water flow rate and water temperature. The experimental apparatus comprises a wind tunnel, water spray system, scrubber, demister, heater, refrigerator, flow and temperature controller, and data acquisition system. The inlet and outlet conditions of air and water are measured when the air contacts directly with water droplets as a counter flow in the spray section of the wind tunnel, and the heat and mass transfer rates between air and water are calculated. The droplet size of the water sprays is also measured using a Malvern Particle Analyzer. In the cooling conditions, the outlet air temperature and humidity ratio decrease as the water flow rate increases and as the water temperature, air velocity and temperature decrease. On the contrary, the outlet air temperature and humidity ratio increase in the heating conditions as the water flow rate and temperature increase and as the air velocity decreases.

An Experimental Study on the Performance of Air/Water Direct Contact Air Conditioning System

The Viking-75 mission environments and lander interface requirements which influence the design of the RTG (radioisotope thermoelectric generator), as well as RTG-related constraints are discussed. The baseline RTG design evolved from these considerations is presented with particular emphasis on the design features which make the Viking RTG unique. These features include a gas management system employing a separate gas reservoir to maintain the RTG hot junction and heat source temperatures within a desired range throughout the various mission phases, as well as a specially profiled housing/radiator assembly which facilitates both ground cooling of the RTGs prior to launch and thermal control of the lander after landing. Also presented is the expected RTG electrical performance when subjected to the various mission environments/requirements, such as 'power-up' operations in Mars orbit just prior to the entry, and thermal cycling on the Martian surface after landing.

SNAP 19 Viking RTG flight configuration and integration testing. [Radioisotope Thermoelectric Generator]

Oddziaływanie strumienia kropel i powietrza na powierzchnię ciała stałego

Analyse, a l'aide d'un modele de simulation sur ordinateur, des performances d'un echangeur de chaleur a ecoulement a contrecourant a contact direct direct entre l'air et des goutelettes d'eau de dimensions uniformes

R.L. Mussulman

Papers

Analysis of a liquid/gas direct contact heat exchanger concept

Comment on "Transient Heat Conduction from Buried Underground Radioactive Waste"