Causes and Solutions of Air Source Heat Pump Frost

During the operation of the air source heat pump in winter, when the air passes through the outdoor heat exchanger coil, water will condense on the surface of the coil, and then form ice or frost. The ice or frost on the coil will not only reduce heat exchange area, and will reduce the air volume that can pass. With the continuous increase of frost, it will affect the heat exchange effect between the air and the coil. Therefore, defrost is a unique phenomenon of air source heat pumps in winter.

2020-07-23

The Role And Characteristics Of Evaporator In Refrigeration System

The four major components of the refrigeration system are the compressor, evaporator, condenser and throttling device. The role of the evaporator is to evaporate (boiling) the refrigerant and absorb the heat of the refrigerant to achieve the purpose of refrigeration. There are many types of evaporator, we will mainly introduce the working principle and structural characteristics of several common evaporators as following:

2020-07-16

Why cold storage need defrost? What are the ways to defrost?

The frost on the surface of the evaporator in the cold storage hinders the conduction and distribution of the cooling capacity of the refrigeration evaporator (pipe), which ultimately affects the cooling effect. When the thickness of the frost layer (ice layer) on the surface of the evaporator reaches a certain level, the refrigeration efficiency even drops below 30%, resulting in a large waste of electrical energy and shortening the service life of the refrigeration system. Therefore, it is necessary to carry out the defrosting operation of the cold storage in an appropriate cycle.

2020-06-26

A Knowledge of Fan Coil Unit

A fan coil unit (FCU), also known as a Terminal Unit, is a simple device consisting of a heating and/or cooling heat exchanger or 'coil' and fan. It is part of an HVAC system found in residential, commercial, and industrial buildings. A fan coil unit is a diverse device sometimes using ductwork, and is used to control the temperature in the space where it is installed, or serve multiple spaces. It is controlled either by a manual on/off switch or by a thermostat, which controls the throughput of water to the heat exchanger using a control valve and/or the fan speed.

2020-06-10

Advantages of Evaporative Condenser

1. The evaporative condenser chiller or condensing unit can save the operating cost of the middle cooling water circulation pump. If it is a traditional chiller, it needs to be equipped with a cooling water pump. Assuming that the cooling circulation pump is designed according to 37KW, the annual operating time is calculated according to 270 days (37KW * 24 hours * 270 days = 239760KW), each year can save 240,000 kilowatts of electricity;

2020-05-22

Water-Cooled VS. Air-Cooled Chillers

Two main types of industrial chillers exist: water-cooled and air-cooled. Though both chiller types cool industrial process fluids, how the system rejects the extracted heat differs. The needs of the overall refrigeration system therefore determine the best chiller model. Understanding these various strengths makes choosing a proper system design easier.

2020-05-12

How To Choose The Correct Water Chiller？

Heat is a single common by-product of today‘s manufacturing machines that include the advanced automation technology required for both high speed operation and high precision. Components such as spindle motors, variable frequency drives, laser and x-ray sources all require cooling to operate properly and reliably – most often in the very adverse manufacturing environments.

2020-05-04