The conservation policies and Rational Use of Energy (RUE) developed until the present, had their origin in the search of a smaller energetic consumption in order to reduce economic costs in a growing prices market of the fuels. Consequently methodologies were developed for the energy saving dimensionment for the residential sector with energetic supply nets.

A dynamic greenhouse climate model was used to simulate the effect of condensation and evaporation on the auxiliary heating requirements, on the inside air humidity and temperature and on the vegetation temperature in greenhouses covered with 12 different cladding materials. Condensation was shown to increase the auxiliary heating requirements for materials having a far infrared radiation transmittance lower than 0.18, while it reduces them for all other materials. Savings ranged between +25 % for PP and -17 % for standard glass.

Room thermal analysis with furniture will generally result in differing heat load values and varying indoor temperatures compared to the same calculation without furniture. This is due to several factors concerning room configuration and its effect on the modes of heat exchange occurring within the indoor environment. The influence of furniture on indoor radiation heat transfer, specifically when computing the peak load of an intermittent heating system, was investigated in this study. The peak load value generally determines the required maximum output capacity of a heating system.

Recent information on CFC's and their impact on the environment has created shockwaves of concern for those who are relying on these products in various applications and a thermal energy storage system can be considered as a useful tool to reduce the initial refrigerant charge by means of minimising the number of refrigeration machinery. A conventional HVAC stand alone ice storage installation may yield capital cost savings through a reduction in refrigeration capacity and possible inherent environmental benefits to be gained from load shifting of electrical energy.

For its new building in Mons, the RTBF (Radio and Television organism of the Belgian French Community) decided, with the help of the Walloon Region, to design several equipments with special techniques characterised by a rational and economical use of energy : primary and noble (electricity) energies and reduced use of CFC.

Modern refrigeration technology including absorption refrigeration has coexisted with the more standard type of vapour compression systems ever since the beginning of refrigeration. Absorption refrigeration mainly requires a heat source to drive its cooling cycle. Only in the USA and Japan is absorption refrigeration widespread in the market, a market tendency of the last decades. Concerns regarding the Global Warming Potential and the more recently defined Thermal Equivalent Warming Impact (TEWI) is an opportunity to further explore the applications of absorption refrigeration.

The following notes were produced "on line", during the conference. A minimum of corrections and additions were a posteriori introduced, in order to make the text readable. But no attempt was made to "soften" the comments. Such a report should , in no case, be considered as exhaustive, neither reflecting any consensus. It is nothing more than a set of subjective impressions collected by the author, along the nine previous technical sessions, after having read the corresponding reports (references 1 to 9).