Low charge series chiller and free cooling

A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system, comprising:

• a process fluid loop configured to receive a process fluid;
• an internal fluid cooling loop configured to receive a cooling fluid;
• an air cooled heat exchanger configured to cool the cooling fluid;
• a vapor compression assembly comprising a vapor compression loop configured to circulate a working fluid through a compressor, a condenser, an evaporator, and an expansion valve, wherein the condenser is configured to place the working fluid and the cooling fluid in a first heat exchange relationship;
• a heat exchanger configured to place the cooling fluid and the process fluid in a second heat exchange relationship, wherein the heat exchanger and the condenser are disposed in series relative to a flow of the cooling fluid through the internal fluid cooling loop;
• a pump configured to bias the cooling fluid through the internal fluid cooling loop;
• a first bypass valve disposed on the internal fluid cooling loop adjacent to the heat exchanger;
• a second bypass valve disposed on the internal fluid cooling loop adjacent to the condenser;
• and
• at least one controller configured to:
• control the first bypass valve between a first open position and a first closed position based on an ambient condition, or any operating condition of the HVAC&R system, or both;
• and
• control the second bypass valve between a second open position and a second closed position based on the ambient condition, the operating condition, or both.

A heating, ventilation, air conditioning, and/or refrigeration (HVAC&R) system comprising:

• a sensor system comprising one or more sensors, wherein the sensor system is configured to detect an ambient condition, or an operating condition of the HVAC&R system, or both;
• and
• a control system comprising one or more controllers, wherein the control system is configured to:
• receive, from the sensor system, data indicative of the ambient condition, or the operating condition, or both;
• and
• control, based on the data, a first pump speed of a first pump configured to bias a cooling fluid through an internal fluid cooling loop comprising an air cooled heat exchanger and extending between a condenser of a vapor compression assembly of the HVAC&R system and a heat exchanger of the HVAC&R system;
• and
• control, based on the data, a second pump speed of a second pump configured to bias a process fluid through a process fluid loop comprising a load conditioned by the process fluid and extending between an evaporator of the vapor compression assembly and the heat exchanger.