Proper operation and maintenance
Studies in Sweden Prakesh (2006) allows to evaluate the potential for energy efficiency in existing facilities. More than 150 systems of various types were analyzed below is a list of major errors, frequency of occurrence, which contributes to the excessive power consumption:
- Incorrect system of charge of mainly low prices, which leads to a low boiling point.
- Improper adjustment of the expansion valve.
- Secondary flow problems.
This after a visit to the obvious facts, such as dirt, filters, heat exchangers, fans, etc. Only 13% of systems were functioning in an optimized manner, and it was estimated that an average of 10% energy savings can be achieved, if all operating systems installed correctly. This study confirms the widely held belief that there is a large number of plants operating in the field of energy efficiency is below the desirable level and practically achievable level.
Historically, low price is often the only interest from equipment buyers/owners and are still often the most important factor that makes it difficult to sell on claims of long-term savings.
An additional problem is that after installation there is rarely any measures, to see if the plant installed gave productivity is estimated in the calculations. There is little risk of exaggerating performance in quotes, for example, excluding accessory power or not to accept the actual operating conditions into account. On-site measurement of the consumed electric power, kW * h, during the period, is relatively simple, but the climate and options for the use of a template, you can easily mask the fall of productivity of equipment.
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Air-Conditioning