Topic hub · Spring and summer
Summer heat and cooling
Hot-weather placement, cooling and dehumidification, and the heat that shortens working windows and stresses equipment.
Calculators for this work
Concrete
Protective coatings and blasting
Blast the steel to the right SSPC/NACE standard and profile, keep it above the dew point, build the film thickness, stripe the edges, and inspect for holidays, because the prep, not the paint, decides whether the coating holds.
Concrete
Hot weather concreting
Beat the evaporation rate, keep the concrete cool and wet from the truck through curing, and stop the surface from cracking before it can set.
Concrete
Mass concrete thermal control
What makes a placement mass concrete, the two temperature limits that govern it, and how the crew holds them with the mix, precooling, insulation, and monitoring.
Concrete
Evaporation rate and plastic cracking
Figure the surface evaporation rate, hold it under the ACI 305 threshold, and protect a fresh slab before it tears while it is still plastic.
HVAC
Natatorium HVAC field guide
Remove the evaporation load and hold the dew point below the cold surfaces, keep the room negative and exhaust the chloramines at the deck, and build it all from corrosion-resistant materials behind a warm-side vapor barrier.
HVAC
Healthcare HVAC ventilation field guide
Hold the room pressure relationship, deliver the air changes and filtration each space needs, keep humidity in range, and monitor and validate it all to a clinical standard.
HVAC
Economizer fault detection field guide
Find the broken economizer that runs mechanical cooling unseen: stuck dampers, dead actuators, bad sensors, the wrong changeover, the FDD logic, and the functional test that proves it.
HVAC
Waterside economizer free cooling
How the cooling tower makes chilled water with the chiller off when the wet-bulb drops, the plate heat exchanger that keeps the loop clean, integrated control, and the freeze protection that keeps it from killing the plant in winter.
HVAC
Refrigeration cycle field guide
Cooling moves heat, it does not make cold. Read the four-part loop, the phase change that carries the load, the high and low side, and the saturation numbers that tell you what the system is doing.
HVAC
Psychrometric chart
How to read the psychrometric chart in the field: dry-bulb, wet-bulb, dew point, humidity ratio, enthalpy, and the process lines that explain what a coil is doing.
Datacenter
Data center airflow management
Getting cold air to the inlets and hot air back without mixing: hot-aisle/cold-aisle discipline, bypass and recirculation, blanking panels, containment, tile tuning, and the airflow commissioning that buys back stranded capacity.
Datacenter
Stranded capacity and power utilization
Why a data hall with open floor and open rack units can be completely full, how power and cooling get trapped, and how to find and reclaim the capacity you already paid to build.
Datacenter
Liquid cooling concurrent maintainability
Service any cooling component with the GPUs running: redundant CDUs and pumps, isolation valves and dripless quick-disconnects, dual paths, and a failover fast enough for a rack that overheats in seconds.
Datacenter
Liquid cooling loop chemistry
The coolant that runs through a GPU cold plate is a precision system, not just water. Hold the pH, conductivity, inhibitor, biocide, and cleanliness in spec or the microchannels foul and the chip starves.
Datacenter
Delta-T and return temperature
Read the air-side delta-T, find the bypass it exposes, and raise and match the rise across the IT and the cooling units to free the capacity already on the floor.
Datacenter
Data center waste heat reuse
Turning the heat a data center throws away into a product: low-grade heat, why liquid cooling makes it usable, the heat pump that upgrades the temperature, the offtaker, district heating, and the ERF that scores it.