Sunday, July 22, 2018
  • Green Investment Facility is offered to SMEs in three industrial sectors: the food industry, the brick industry and the ceramics industry

  • GIF applies to loans between 400 million to 4 billion VN

  • 50% bank guarantee for bank loan in energy investments

  • Fund 110 billion VND from Denmark

  • #GIF can be applied for projects with a minimum energy savings potential of 20%

  • The SME will be awarded a rebate on the loan of up to 30% if achieved 50% on energy savings

  • The SME will be awarded a rebate on the loan of up to 30% if achieved 50% on energy savings

Correct pressure level

Cooling capacity is an expensive resource, and the lower the temperature, the more expensive it gets. It is therefore of major importance that the refrigeration plant delivers cooling at correct temperature, and not lower than necessary.

Cooling capacity is an expensive resource, and the lower the temperature, the more expensive it gets. It is therefore of major importance that the refrigeration plant delivers cooling at correct temperature, and not lower than necessary.

If there are cooling demands at different pressure level, they should be provided with cooling capacity from different pressure levels to avoid expensive and inefficient use of compressors. This will normally require installation of new pipes.

A typical situation is that air conditioning in production areas (above 0 ºC) is supplied with cooling capacity from the same plant as cold stores (below -18 ºC).

The two main reasons for this situation are:

- The cooling demand has changed since the construction of the facility. Either the production has expanded or changed.

- The design of the refrigeration plant has been poorly made from the beginning.

Energy saving potential:

The saving potential can be between 10-50% of total electricity used be the compressors, of that share of cooling delivered to the units operated at a to low temperature.

The situation and solution opportunities vary greatly from refrigeration plant to refrigeration plant.

Diagnosis of situation:

The process to determine if there is an energy saving potential or not can take some time, but it is easy to perform.

1. Investigate which pressure levels that are used by all the different compressors at the site, and convert these data to temperature levels (suction pressures of the compressors)

2. Determine which compressors that provide refrigerant for which users.

3. Compare the operating temperature of the compressor with the temperature needed by the cooling unit.

4. If there are a temperature difference there are greater than 4 K, there are a potential for improvements.

Payback time:

For a project like this, the normal payback time will be medium.

How to proceed: First step is to determine if there is potential. This can be done as described above, but it can also be necessary get assistance from a specialist in the field.

If it is possible to reconfigure some of the refrigeration system, a supplier should help with this work.