saving energy on coldroom

[young gun]

Has anyone every tested or experienced the energy savings on a coldroom by running 2 setpoints, a daytime setpoint and a night time/low load setpoint. Just say 1-3 degrees C during day and 3-5C at night.
Has anyone tried it and measured power savings?
Do you think it would add any power savings??
Would the compressor running time really end up much less?, even though at night its not lowering it as much, would the running time from cycling it between 1-3, and 3-5 would make much of a difference.....????

Anyones thoughts or experiences would be much appreciated...... thankyou

[install monkey]

air curtain, led lights on a pir , trimming the defrost duration would reduce costs- also inverter drive or soft start kit on the compressor, dc fans would help too

[The Viking]

Queensland?
Haven't you got different electricity tariffs day/night?
If so, which is the cheaper one?

[RANGER1]

Cool room need to know if temp swing effects product, like milk.
power is cheaper at night so you need to understand your power bill & tariff.
Usually run colder at night tariff as power is cheaper.
let temp float up during the day.

That what big cold stores do if they can, but in freezer example with ice cream they like temp stable so not to affect quality.
On larger jobs VSD on evap & compressor, run temp low as you can at night.

[FreezerGeezer]

Maybe it's worth considering an ice bank? Build it on cheap power & use it to reduce the cooling load in the day time.

[RANGER1]

How big is this cool room, or is it just a general question?

[young gun]

approximately 8 x 10m....... great point about the cheaper electricity at night guys

[Peter_1]

Try to condens as much as possible and to evaporate as high as possible. This will give you the biggest savings.
ECM fans as someone suggested.
The only saving duing night is the lower DT over the panels, so smaller losses but very marginal. This will be not noticable at all in the total energy bill.
It will be just the opposite I think: compressor will have to run at more expensive rates during the day to cool down the load again in the coldroom.
Is a higher setpoint allowed for the products

[jonjon]

Don't use it

[NewmanRef]

Link out the meter for 4 hours a day.

[dominicblake]

Any energy efficiency initiative dealing with refrigeration
should start by reviewing the heat gains on your system.
If you understand the nature of these gains, you’ll be able
to manage the amount of cooling that needs to be done
and make energy savings. Heat gains include warm air
entering the cabinet or cold room and heat produced by
electrical equipment within the cooled space. This guide
covers in detail two opportunities to reduce heat gains:
reducing cold air changes using strip curtains, and using
EC (electronically commutated) replacement motors
for evaporator fans.

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