![\"Technician](\"http:\/\/www.oc-epc.com\/wp-content\/uploads\/2026\/10\/03-loaded-drying-room-temperature-map.webp\")
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Validate airflow and temperature uniformity in a lost foam drying room with two linked studies: an airflow map and a multipoint temperature map. Run both with a documented room configuration and a representative load. The controller display alone cannot prove uniform conditions around every EPS pattern. A useful test must identify the qualified working zone, capture warm-up and steady operation, challenge likely hot and cold locations, and confirm that the same load reaches the foundry’s defined release condition.<\/p>\n
Start with the process requirement, not a generic temperature tolerance. Record the target air-temperature range, permitted variation between measurement points, stabilization rule, recovery time after a door opening, humidity or dehumidification requirement, and the condition that allows a pattern or coated cluster to leave the room. These limits depend on the EPS grade, pattern geometry, coating system, loading method, and the next operation.<\/p>\n
Separate control accuracy from spatial uniformity. A control sensor may remain close to its setpoint while corners, upper racks, or positions near the door behave differently. Ouchen’s pengering udara dalam ruangan<\/u><\/strong><\/a>\u00a0page describes intelligent temperature control and customized temperature, humidity, and wind-field solutions. Project acceptance should still verify the complete working zone under the intended duty.<\/p>\n Document the supply and return arrangement, fan settings, damper positions, door condition, rack layout, sensor locations, and data-logging interval. Then select a load that represents production. Include the normal rack population and the largest or most airflow-restrictive pattern family. If an empty-room test is used for commissioning, follow it with a loaded test because racks and closely spaced patterns can redirect circulation.<\/p>\n Use a suitable calibrated air-velocity instrument to measure a defined grid at the supply face, return face, and representative load planes. Record velocity and direction, not only an average. A high average can hide a fast channel beside a stagnant zone. Repeat measurements after the room reaches its normal fan condition and with the production load in place.<\/p>\n Check for short-circuiting from supply to return, weak circulation behind racks, obstruction by large patterns, and strong jets directed at one surface. Where visual confirmation is useful, use a clean, supplier-approved airflow visualization method that will not contaminate EPS or coating. Treat the airflow map as diagnostic evidence; it explains why a temperature location is slow to heat or slow to recover.<\/p>\n Place independent data loggers or thermocouples throughout the qualified working zone. At minimum, cover upper and lower levels, corners, the center, positions close to supply and return air, the door area, and locations shielded by the load. Add sensors on or beside representative patterns when the process needs evidence of what the load experiences rather than room air alone. Do not use a universal sensor count; scale the grid to the room, rack arrangement, and risk.<\/p>\n Log the complete cycle: startup, approach to setpoint, stabilization, steady operation, a defined door-opening challenge when relevant, and recovery. Compare every channel over the agreed evaluation period. Report the hottest point, coldest point, point-to-point spread, time to stabilization, and recovery time. One snapshot is insufficient because a location may cycle above and below the limit at different times.<\/p>\n Mount sensors so they do not touch walls, ductwork, racks, or other surfaces unless a surface temperature is intentionally being measured. Protect lead wires from door gaps and direct supply jets. Run a repeat cycle without changing the setup when the first result is close to the limit or contains an unexplained excursion. Agreement between runs strengthens the conclusion; a different pattern suggests an unstable operating condition, a moved sensor, or an intermittent airflow restriction that needs investigation.<\/p>\n Uniform air temperature does not by itself prove uniform drying. Record relative humidity or the project’s approved dehumidification indicator, and verify patterns with the agreed release method. Depending on the process, that may be a stable weight trend, a coating or handling condition, or another validated plant test. The related guide to selecting an air source heat pump drying unit<\/u><\/strong><\/a>\u00a0explains why the release condition must be defined around the actual pattern and coating system.<\/p>\nFix the Test Configuration and Representative Load<\/b><\/strong><\/h2>\n
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Map Airflow Before Interpreting Temperature<\/b><\/strong><\/h2>\n
Run the Loaded Temperature Mapping Test<\/b><\/strong><\/h2>\n
![\"Technician](\"http:\/\/www.oc-epc.com\/wp-content\/uploads\/2026\/10\/04-temperature-probe-placement.webp\")
<\/p>\nConnect Room Conditions to Pattern Release<\/b><\/strong><\/h2>\n
Diagnose Nonuniform Results Systematically<\/b><\/strong><\/h2>\n