Reasons and Solutions for High Power Consumption of Constant Temperature Cold Storage
There are several common reasons for the high power consumption of constant temperature cold storage:
1. The choice of innovation, second-hand equipment, and second-hand boards leads to higher power consumption.
Reason: The internal structure of second-hand equipment is worn, and it is not as stable as new equipment. Just like used equipment, it has a long lifespan. Then innovate, the interior has been used for a long time, and many parts are worn out, resulting in higher electricity bills.
Reason: Second-hand boards and constant temperature cold storage boards are generally used for about 10 years and have a long service life. After two disassembly and assembly, many seals were partially damaged, and the thermal insulation performance of the polyurethane inside the warehouse board decreased, resulting in loss of cooling capacity, poor thermal insulation effect, prolonged working hours of the unit, and high electricity bills.
Solution: Choose the constant temperature cold storage unit equipped by the regular company, and choose the second-hand equipment as little as possible.
2. If you don't pay attention during use, and the entry and exit time is not controlled, it will lead to higher electricity bills.
Reason: When the constant temperature cold storage is in use, the door is not closed, the light is not turned off, the heat enters, the lamp in the storage is turned on for a long time, the temperature in the storage rises, and the unit starts to work.
Reason: The constant temperature cold storage chooses to enter and exit at noon. The high outdoor temperature at noon caused the temperature to enter the warehouse. The high heat of other cargo will also cause the unit to work for a long time.
Solution: If the demand for goods is frequent and the time of the goods cannot be controlled, an air curtain can be installed at the door of the warehouse, so that the air curtain can isolate the heat outside the warehouse, reduce the loss of cooling energy in the warehouse, and naturally reduce the working time of the unit. .
3. Failure to maintain constant temperature cold storage panels, compressors, air curtains, and defrosting of exhaust pipes leads to increased equipment power.
Reason: Plates and equipment, like cars, also need to be maintained on time. Therefore, we should be clear that the plates in the constant temperature cold storage are used for a long time, the silica gel simply falls off, the plates are simply bumped, and the sealing effect is not good.
Reason: There are materials in the unit that need to be replaced on time, such as refrigeration oil. If it is not replaced for a long time, just like the transmission oil and oil of the car, it will become dark and thick, affecting the working effect.
Solution: Maintain the constant temperature cold storage on time, check the sealing effect in the warehouse, see if there is black colloid under the warehouse door, whether there is air flowing out, and close the door tightly. Then, use the lighter on the bottom to test if the fire will go out. If there is a cold phenomenon, you can tell the maintenance team to make adjustments. After all, they are all mechanical parts, and they will loosen over time.
4. Improper design of cold storage, insufficient thermal insulation thickness or unreasonable equipment configuration;
If the large power consumption of the cold storage is caused by improper installation design, the cold storage can be retrofitted to save energy; by transforming the refrigeration system, thermal insulation structure or equipment configuration, the working efficiency of the cold storage can be improved and the cooling loss can be reduced, so as to achieve the purpose of reducing operating power consumption.
Design energy saving:
(1) Reasonably determine the design parameters. Reduce the temperature difference between the refrigerant evaporation temperature and the temperature in the cold storage. According to estimates, when the evaporation temperature decreases by 1 °C, it will consume 3%-4% more electricity. In addition, reducing the temperature difference value is also extremely beneficial to reduce the dry consumption of the stored food in the warehouse.
(2) Reasonably set the cooling capacity, the cooling capacity of the compressor and the actual cooling capacity of the cold storage. After the calculation and summary of the cooling consumption of the cold storage, it is not possible to blindly increase the insurance factor and provide more cooling capacity.
Note: Some customers may feel that the cost of cold storage renovation is not cheap, and hope to solve it through other simpler methods. In fact, the economic value of energy saving of cold storage is very high. It must be known that the service life of the cold storage can reach more than ten years. It is not cost-effective to retrofit in the later stage, but the retrofit in the early and mid-term can greatly improve the working efficiency and operating cost of the cold storage, which is worth spending money on. .
5. The management is extensive, and the operators have no professional training or weak safety awareness.
Manage energy conservation:
(1) Reasonably start the machine to reduce the power consumption of the compressor. At present, most cold storages still use manual operation to adjust the startup, and the phenomenon of blind startup is common. In order to improve the rationality and economy of the compressor, the research results show that three principles can be followed. First, correctly estimate the change in the actual cooling capacity of the cold storage. Second, on the premise of ensuring that the cooling load is met, the number of startup units should be reduced as much as possible to improve the operating efficiency of the compressor. Third, adjust the boot time. Through the remote intelligent adjustment of "Yunzhi Cooling" APP, on the premise of not affecting the refrigerated quality of the refrigerated objects, the "valley price" operation at night can be used to reduce the "peak price" operation time during the day, avoid peak electricity consumption periods, and reduce operating costs. .
(2) Quickly locate high-energy-consuming equipment, find and solve problems in a timely and accurate manner. On the "Yunzhi Cooling" APP, you can flexibly see the monthly overall power consumption and each cold storage project, and the detailed power consumption of each refrigeration system in each time period, such as the current real-time power, the current day Electricity consumption, historical energy consumption trends, etc. Carry out detailed investigation on other parameters of equipment with high power consumption, and then carry out equipment maintenance and management in a targeted manner to achieve the purpose of energy saving.
