Used in the field of industrial refrigeration, the refrigerant circulates inside the tubes (sometimes with improved geometry) to improve transfer performance and increase the compactness of the heat exchangers. In the case of dry expansion, it is supplied by a thermostatic expansion valve, allowing it to regulate the overheat. Shell and tube dry expansion and thermosyphon evaporators work with the fluid to be evaporated circulating inside the tubes.
The type, arrangement, material and dimensions of the tubes are carefully chosen to allow the fluid to transfer heat very well. These are made up of a set of closely spaced tubes, arranged in parallel (called a tube bundle) and grouped together in the same cylindrical body (called a shell). The evaporator is a heat exchanger working with a fluid whose pressure and temperature conditions allow it to pass from the liquid state to the gaseous state.Īs a specialist in the design and manufacture of shell and tube heat exchangers, Quiri develops tubular evaporators.
Integrated in cooling equipment, it is through the evaporation of the refrigerant that heat is withdrawn from the fluid that one wishes to cool or from the air of an enclosure that one wants to maintain at a low or negative temperature. When an evaporator is used in a cogeneration plant to produce primary or secondary steam, it is a steam generator. When used neither in steam production, nor as part of a distillation process, it is rather identified as a vaporizer. If it is used in a process at the bottom of a distillation column, whether the steam is water or not, it is called a reboiler. If it is used to convert water or an aqueous solution from the liquid state to the vapor state, it is generally referred to as an evaporator.
#QUIRI FIELD CODE#
The code uses the INSTANCEOF operator to query for those records.An evaporator is a heat exchanger that converts the sensible or latent heat of one fluid into the latent heat of vaporization of another. For example, to search for configuration items (cmdb_ci table) you many want to retrieve all configuration items that are have are classified as computers. Retrieves only records of a specified class for tables which are extended. The example shown on the right will get all records where the short_description field does not contain the text 'Error' anywhere in the field.ĪddQuery('short_description', 'DOES NOT CONTAIN', 'Error') įield must contain the value supplied anywhere in the string provided.ĪddQuery('sys_id', 'IN', '0331ddb40a0a3c0e40c83e9f7520f860,032ebb5a0a0a3c0e2e2204a495526dce')
The example shown on the right will get all records where the short_description field contains the text 'Error' anywhere in the field.ĪddQuery('short_description', 'CONTAINS', 'Error') įield must not contain the value supplied anywhere in the field. The example shown on the right will get all records where the short_description field ends with text 'Error'.ĪddQuery('short_description', 'ENDSWITH', 'Error') įield must contain the value supplied anywhere in the field. The example shown on the right will get all records where the short_description field starts with the text 'Error'.ĪddQuery('short_description', 'STARTSWITH', 'Error') įield must end with the value supplied. The following operators can be used in addition to the standard field/value query searching shown above…įield value must be equal to the value supplied.įield must be greater than the value supplied.įield must be equal to or greater than the value supplied.įield must be equal to or less than the value supplied.įield must start with the value supplied.
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