Development of tool for implementation of energy-economic cooling system with natural coolants

Measurements were made of three cooling system for supermarkets and measurement on one cooling system for cooling offices and server rooms. The cooling systems are selected so that they cover various system types and sizes that you expect to see in the future. The measurements are then compared with simulations.

The results of the simulations for cooling systems for supermarkets shows that calculating the annual energy consumption it can be made with a reasonably high according to the measurement results. The accuracy of the calculation depends primarily on user input - and time. In most cases, a very accurate calculation cannot be necessary as the relative accuracy of the consequences of making various savings initiatives are far greater - and probably more interesting.

The results of the simulations on the air-conditioning system shows that the accuracy of measurements and simulations are relatively low. Inputs used to determine the cooling load and the climatic out door conditions have a very significant impact on the calculation result. Simulation will primarily be useful to calculate the consequences of making various cost-cutting measures, and make a relative comparison between different types of systems. In practice, one can hardly expect to be able to create a simulation that very accurately reproduce reality.

The simulations and measurements show in addition to the primary studies that cooling demand cooling server per year is far greater than the cooling load for cooling of office space. This is enhanced extremely, if the facility is not equipped with possobilities for free cooling of server during winter.